Mixed Practice B

Strengthen connected data and modeling reasoning.

This set uses more layered decisions about units, correlation, residuals, model choice, and prediction limits.

How to use this set

When choices feel close, attach units and ask whether the statement matches the data range and context.

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Set Focus

Deeper mixed data review

These items build stamina with context-heavy EOC-style data questions.

Units

Interpret slope and residuals using the units from the problem.

Prediction limits

Treat far extrapolation with caution.

Two-way tables

Use conditional percentages to support conclusions.

Fit

Choose models that match the shape of the data.

Practice Questions

Mixed Review B

Check your answer first, then reveal the explanation when you want the model.

Question 1

Model prediction

A restaurant uses y=1.8x+22 to model daily sales y, in hundreds of dollars, from temperature x, in degrees. What is the predicted sales when x=70?

Question 2

Interpret slope

For y=1.8x+22, what does the slope mean in context?

Question 3

Residual

The restaurant model predicts 148 hundred dollars in sales, but actual sales are 152 hundred dollars. What is the residual?

Question 4

Model appropriateness

A scatterplot shows points that rise quickly at first and then level off. Which model choice is most reasonable?

Question 5

Correlation coefficient

Which correlation coefficient best matches a weak negative linear relationship?

Question 6

Two-way table

The table shows transportation and on-time arrival. What percent of bus riders arrived on time?

Transportation and arrival

Transportation	On time	Late	Total
Bus	42	18	60
Car	36	4	40
Total	78	22	100

Question 7

Categorical association

Using the transportation table, which conclusion is best?

Transportation and arrival

Transportation	On time	Late	Total
Bus	42	18	60
Car	36	4	40
Total	78	22	100

Question 8

Extrapolation caution

A data set models phone battery percent for the first 8 hours after charging. Which prediction should be treated with the most caution?

Question 9

Residual interpretation

A residual for a house price model is -12000. What does this mean?

Question 10

Best fit visual

Which line of best fit is usually best for a scatterplot with a positive linear trend?

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