Week 12 — Homes, Families, and Later Weddings: Reading the 1975 and 2025 Household Figures

Assignment 11 of the term — read the Census Bureau's household figures for 1975 and 2025, work out what they say, and explain to someone outside sociology why fewer married-couple households is not the same as fewer families.

This adaptive assignment uses a coaching dialogue to help you turn a first attempt into a clear, evidence-based report. You remain the author. The coach asks questions, checks the reasoning you show, and waits for you to revise before it produces the required report. In Week 2 you learned to read any statistic four ways and to keep percentage points separate from percent; this week you use those habits on fifty years of household change, and you add the Census Bureau's line between a household and a family. This week's lecture tutorial, quiz, discussion, and Sociology in Action Workshop practice the same ideas from other angles; this assignment is where you put them together.

The task

You will use these figures, all from this week's chapter, plus one illustrative scenario:

• The Census Bureau's 2025 Families and Living Arrangements release: married-couple households were 47% of U.S. households in 2025, against 66% in 1975. One-person households were 29% of households in 2025, which was 39.7 million households, against 20% in 1975. The shares are shares of households, not of people.
• The same release: the median age at first marriage was 30.8 for men and 28.4 for women in 2025, against 23.5 and 21.1 in 1975.
• An illustrative apartment complex (invented for this assignment): it holds 80 households, of which 22 are one person living alone and 10 are unrelated roommates sharing a unit; every other household is people living with at least one relative.

Work these four problems, showing your arithmetic:

1. Married-couple households were 66% of U.S. households in 1975 and 47% in 2025. By how many percentage points did the share fall?
2. The median age at first marriage for men was 23.5 in 1975 and 30.8 in 2025. By how many years did it rise?
3. One-person households were 20% of U.S. households in 1975 and 29% in 2025. By what percent did that share grow, measured against its 1975 level?
4. An illustrative apartment complex holds 80 households; 22 are one person living alone and 10 are unrelated roommates sharing a unit. How many of its households are family households?

Beside each answer, add one brief interpretation of what that value shows and one limit of it. For problem 1, say what the share counts and whom it describes, and explain why the drop does not mean there are fewer families. For problem 2, say what a median age at first marriage measures, explain why a later median does not show that people no longer marry, and say whether the figure shows a correlation, a cause, or neither. For problem 3, explain the difference between the 9-point change and the percent you found, and say what the rise cannot tell you about why more people live alone. For problem 4, use the Census Bureau's definitions to explain why the one-person and roommate households are households but not families, and why a family household need not hold a married couple.

Explain it to a non-expert

Your aunt has never studied sociology and reads a headline: "The American family is disappearing: fewer than half of homes are married couples." She lives alone since her children moved out, and asks whether that makes her part of the problem. Write a 3–5 sentence message to your aunt that explains in everyday words the difference between a household and a family, says what the 47% figure counts and what it does not, mentions that people are marrying later rather than not at all, notes that sociologists read the same trend as decline or as change, and names one limit of the figures. Explain any technical term in everyday words. More than one accurate message can be defensible.

For a different, ungraded example, imagine a friend who hears that a town library issued fewer library cards this year and asks whether people in the town have stopped reading. Model answer: "Not necessarily. A library card count tells you how many people signed up at that library, not how many people read. Some readers may borrow e-books on a phone app, share one card in a household, or buy books instead. The limit is that the count cannot tell you why sign-ups fell, only that they did."

Use that pattern for your message to your aunt, with your own explanation and evidence.

Part 1 — Student instructions

1. Draft all four answers, the four brief interpretations, and your message to your aunt before opening a chatbot.
2. Open any course-approved chatbot. Copy the entire Coach Prompt box, including its first and last marker lines, and paste it as one message. The coach will ask for your draft and then work one question at a time.
3. Answer in your own words. Show calculations when asked. Use the coach's feedback to revise at least one calculation or explanation, even if your first attempt was correct.
4. Continue until the prompt's exit condition is met.
5. Save the chat's share link and copy the final report exactly as the coach gives it.

The chatbot is a coach, not a ghostwriter. It must draw out your reasoning rather than write the report for you.

Coach Prompt

COPY EVERYTHING BELOW THIS LINE
ROLE: You are a careful learning coach. Draw out and challenge MY thinking about the Census Bureau's 1975 and 2025 household figures and the difference between a household and a family, including shares of households, percentage points versus percent, a median age at first marriage, and correlation versus cause. Do not write my assignment for me and do not invent work I did not show.

ASSIGNMENT: Work through these four problems in order, one at a time. Do not invent, replace, or reorder a problem. The data: the Census Bureau's 2025 Families and Living Arrangements release: married-couple households were 47% of U.S. households in 2025, against 66% in 1975; one-person households were 29% of households in 2025, which was 39.7 million households, against 20% in 1975; the shares are shares of households, not of people. The median age at first marriage was 30.8 for men and 28.4 for women in 2025, against 23.5 and 21.1 in 1975. An illustrative apartment complex holds 80 households, of which 22 are one person living alone and 10 are unrelated roommates sharing a unit; every other household is people living with at least one relative.
PROBLEM P1: Married-couple households were 66% of U.S. households in 1975 and 47% in 2025. By how many percentage points did the share fall?
PROBLEM P2: The median age at first marriage for men was 23.5 in 1975 and 30.8 in 2025. By how many years did it rise?
PROBLEM P3: One-person households were 20% of U.S. households in 1975 and 29% in 2025. By what percent did that share grow, measured against its 1975 level?
PROBLEM P4: An illustrative apartment complex holds 80 households; 22 are one person living alone and 10 are unrelated roommates sharing a unit. How many of its households are family households?
After the four results, I must briefly interpret each one: what that value shows and one limit of it; for P1, what the share counts, whom it describes, and why the drop does not mean fewer families; for P2, what a median age at first marriage measures, why a later median does not show that people no longer marry, and whether the figure shows a correlation, a cause, or neither; for P3, the difference between the 9-point change and the percent I found, and what the rise cannot tell me about why more people live alone; for P4, why the one-person and roommate households are households but not families, and why a family household need not hold a married couple. I must then write a 3-5 sentence message to my aunt, who is new to sociology, lives alone, and asks whether a headline saying the family is disappearing means she is part of the problem, explaining household versus family in everyday words, saying what the 47% figure counts and does not, mentioning that people marry later rather than not at all, noting that sociologists read the trend as decline or as change, and naming one limit. I must explain technical terms in everyday words.

SCORING CRITERIA: Score only evidence I supply: correct computations from the data (40 points), concept and interpretation reasoning (32 points), clarity for a non-expert reader (16 points), and showing work so it can be checked (12 points). For each of P1-P4, give 2, 1, or 0 evidence units per criterion; one unit is worth 5 computation points, 4 reasoning points, 2 clarity points, or 1.5 showing-work points. Sum all four problems within each criterion. Count my final message only with P4, not again with P1-P3.
COMPUTATION UNITS: A correct difference, percent, or count = 2; the right values and operation with only an arithmetic slip = 1; a missing result or the wrong values or operation = 0. Do not penalize an alternative valid method or equivalent correct notation.
REASONING UNITS: For P1-P3 separately, an accurate account of what that value shows plus a limit or a correlation-or-cause reading tied to that figure = 2; exactly one of the two = 1; neither = 0. For P1, reading the 19-point drop as "fewer families" does not count. For P3, calling the 9-point change a 9 percent rise does not count. For P4, BOTH an explanation, using the Census definitions, of why one-person and roommate households are not families and why a family household need not hold a married couple AND a final message that explains household versus family, says what the 47% counts, says people marry later rather than not at all, notes the decline and change readings, and names a limit = 2. If full P4 evidence is absent but at least one accurate substantive part appears, give 1. No accurate reasoning = 0. An arithmetic slip alone is not a reasoning error.
CLARITY UNITS: For each problem, labeled evidence understandable to someone new to sociology, with technical terms explained = 2; intelligible evidence that needs rereading because of ambiguity or jargon = 1; absent or unintelligible evidence = 0. Include the final message with P4 if submitted. Missing reasoning alone does not lower clarity for otherwise clear submitted work.
SHOWING-WORK UNITS: For each problem, checkable values and steps = 2; a relevant but incomplete value or step = 1; a result alone or no method = 0. A visible method stays checkable despite an arithmetic slip.

Do NOT invent grading rules.

DIALOGUE RULES: Ask exactly one question per message and wait for my reply. Start by asking for my complete first attempt. Build each next question from my exact words. Probe an unsupported claim and ask me to examine its evidence. Keep the conversation focused on questions rather than completed work.

ENGAGEMENT GUARDS: A greeting, copied prompt, yes/no reply, or one-word reply is not a substantive exchange. Do not flatter or accept agreement as evidence. Praise only a concrete move I made. If evidence is missing, say what is missing and ask for it. Require a real revision plus a short reflection on why the revision is better. Do not issue the report early.

EXIT CONDITION: Continue until at least five substantive exchanges have occurred AND I have supplied all four results and their brief interpretations AND written my message to my aunt AND revised at least one calculation or explanation AND reflected on the revision. Stop only after whichever requirement happens last.

REPORT: After the exit condition is satisfied, output exactly these labelled lines in this order. Replace X with the exact earned score; it may end in .5 and must not be rounded to a whole number. Base every line only on evidence in this chat; write "Not supplied" for missing evidence and never raise the score for polished chatbot prose.
STUDENT'S SCORE: X/100
EVIDENCE FOR THE SCORE: [specific evidence from my calculations and reasoning]
REVISION MADE: [what I changed and why]
STRENGTH: [one earned strength]
NEXT STEP: [one concrete improvement]
Then tell me to submit this report, my revised data-reading report, and the share link.
COPY EVERYTHING ABOVE THIS LINE

Deliverables

Submit these three items in the assignment entry:

• your revised data-reading report with all four answers, their brief interpretations, and your message to your aunt — written, or recorded as audio or video with a transcript, or as a labelled diagram of the household figures with a short note; every form is graded by the same scoring criteria;
• the coach's five-line report; and
• the conversation share link.

Submit in any accessible file type or as a link; a recorded response may be submitted as audio or video with a transcript, or as text.

Equivalent route (no AI required)

This route assesses the same Week 12 skills — reading a share of households for what it does and does not count, writing a change between two percentages in percentage points and in percent, reading a median age at first marriage as timing rather than a verdict, telling a household from a family the way the Census Bureau does, and deciding whether a figure shows a correlation or a cause — for comparable time and effort, about 60 to 90 minutes, the same as the coached route. Complete the same four problems, the four brief interpretations, and the message to your aunt. Then audit your own first draft against the attached scoring criteria, criterion by criterion, and write a second draft. Add a 150–200 word revision memo that names one calculation or explanation you changed, the evidence that prompted the change, and one question you still have. Submit the revised data-reading report, your completed criteria checklist, and the revision memo in the assignment entry; together they replace the share link and the coach's report. This route uses the same scoring criteria and the same points, with no penalty for choosing it.

How you'll be graded

The full analytic rubric is attached to this assignment in Canvas.

Academic integrity and AI use

The calculations, reasoning, revision, and final report must be your own. Do not ask the chatbot to create the assignment or add evidence you did not produce. Submit an honest share link from your own dialogue. The equivalent route keeps the same workload and evidence and requires no AI account.

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