Unit Test — Unit test Answers

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The dot plot represents the amount of rain recorded by rain gauges in different locations around a city.

A store manager is looking at past jewelry sales to determine what sizes of rings to keep in stock. The list shows the ring sizes purchased by the last ten jewelry customers.9, 7, 6.5, 7.5, 7, 8, 5, 6, 7.5, 8

0.40

0.72

1.15

2.14

Which values are correct? Select three options.

a = 15

b = 18

c = 23

d = 35

e = 31

Which graph shows data whose r-value is most likely closest to 1?

A graph shows both axes unnumbered. Points show a downward trend.

A graph shows both axes unnumbered. Points show an upward trend.

A graph shows both axes unnumbered. Points show a downward trend.

A graph shows both axes unnumbered. Points are scattered all over the graph.

The two-way frequency table represents data from a survey asking mall visitors whether they like seafood, meat, or both. Which is the joint relative frequency for mall visitors who like seafood and meat?

StartFraction 5 Over 72 EndFraction

StartFraction 16 Over 72 EndFraction

StartFraction 20 Over 72 EndFraction

StartFraction 31 Over 72 EndFraction

Ms. Sutton recorded the word counts and scores of the top ten essays in a timed writing contest. The table shows her data.How does the word count of an essay relate to its score in the contest?

Word count tends to decrease as the score decreases.

Word count tends to increase as the score decreases.

Word count tends to remain constant as the score decreases.

Word count has no apparent relationship to the score of the essay.

The data set represents the total number of people who bought bananas each hour at a grocery store.1, 1, 5, 5, 7, 8, 8, 10, 12Which box plot correctly represents the data?

A number line goes from 0 to 16. The whiskers range from 1 to 12, and the box ranges from 3 to 9. A line divides the box at 7.

A number line goes from 0 to 16. The whiskers range from 1 to 12, and the box ranges from 5 to 9. A line divides the box at 7.

A number line goes from 0 to 16. The whiskers range from 1 to 12, and the box ranges from 5 to 8. A line divides the box at 7.

A number line goes from 0 to 16. The whiskers range from 1 to 12, and the box ranges from 3 to 8. A line divides the box at 7.

The graph represents the distribution of the number of questions answered correctly on a 50-question math test.

Blanca runs 8 laps around the track each day to train for an endurance race. She times each lap to practice her pacing for the race. The table shows the lap times, in seconds, for three days of practice.Which histogram represents Blanca’s lap times for the three days of practice?

A graph shows lap time (seconds) labeled 82 to 98 on the horizontal axis and number of laps on the vertical axis. 1 lap was 82 to 84 seconds. 4 laps were 84 to 86 seconds. 2 laps were 86 to 88 seconds. 4 laps were 88 to 90 seconds. 6 laps were 90 to 92 seconds. 5 laps were 92 to 94 seconds. 2 laps were 94 to 96 seconds. 0 laps were 96 to 98 laps.

A graph shows lap time (seconds) labeled 82 to 98 on the horizontal axis and number of laps on the vertical axis. 1 lap was 82 to 84 seconds. 3 laps were 84 to 86 seconds. 3 laps were 86 to 88 seconds. 5 laps were 88 to 90 seconds. 5 laps were 90 to 92 seconds. 3 laps were 92 to 94 seconds. 3 laps were 94 to 96 seconds. 1 lap was 96 to 98 seconds.

A graph shows lap time (seconds) labeled 82 to 98 on the horizontal axis and number of laps on the vertical axis. 1 lap was 82 to 84 seconds. 3 laps were 84 to 86 seconds. 3 laps were 86 to 88 seconds. 4 laps were 88 to 90 seconds. 6 laps were 90 to 92 seconds. 4 laps were 92 to 94 seconds. 2 laps were 94 to 96 seconds. 1 lap was 96 to 98 laps.

A graph shows lap time (seconds) labeled 82 to 98 on the horizontal axis and number of laps on the vertical axis. 1 lap was 82 to 84 seconds. 4 laps were 84 to 86 seconds. 2 laps were 86 to 88 seconds. 4 laps were 88 to 90 seconds. 6 laps were 90 to 92 seconds. 3 laps were 92 to 94 seconds. 4 laps were 94 to 96 seconds. 0 laps were 96 to 98 laps.

A data set is shown in the table. The line of best fit modeling the data is y = 2.69x – 7.95.

–0.88

–0.12

0.12

0.88

The table shows the estimated number of lines of code written by computer programmers per hour when x people are working.

y = 47(1.191)x

y = 34(1.204)x

y = 26.9x – 1.3

y = 27x – 4

The table shows the number of flowers in four bouquets and the total cost of each bouquet.

–0.57

–0.28

0.28

0.57

The graph shows the best-fit regression model for a set of data comparing the number of hours spent hiking and the number of miles traveled in one day.

Each point in the data set falls on the regression line.

The regression model is an accurate representation of the distance for any number of hours hiked.

Each point in the data set is near the regression line.

The regression model is inaccurate, as it does not begin at (0, 0).

Which phrases describe the relationship between heart rate and daily intake of caffeine? Select two options.

negative correlation

increasing heart rate

constant correlation

positive correlation

decreasing heart rate

Melissa collected the data in the table.

–3

–1

The data set represents the total number of tickets each person purchased for a play.0, 0, 1, 1, 1, 2, 2, 2, 4, 4What is the median of the data?

1.5

2.5

Which value for R in the table would most likely indicate an association between the conditional variables?

0.09

0.10

0.13

0.79

Which could be a conditional relative frequency table?

A 4-column table with 3 rows. The first column has no label with entries C, D, total. The second column is labeled A with entries 0.25, 0.25, 0.50. The third column is labeled B with entries 0.25, 0.25, 0.50. The fourth column is labeled total with entries 0.50, 0.50, 1.0.

A 4-column table with 3 rows. The first column has no label with entries C, D, total. The second column is labeled A with entries 0.25, 0.35, 0.30. The third column is labeled B with entries 0.75, 0.65, 0.70. The fourth column is labeled total with entries 1.0, 1.0, 1.0.

A 4-column table with 3 rows. The first column has no label with entries C, D, total. The second column is labeled A with entries 0.75, 0.25, 0.50. The third column is labeled B with entries 0.25, 0.75, 0.50. The fourth column is labeled total with entries 0.50, 0.50, 1.0.

A 4-column table with 3 rows. The first column has no label with entries C, D, total. The second column is labeled A with entries 0.65, 0.35, 1.0. The third column is labeled B with entries 0.35, 0.65, 1.0. The fourth column is labeled total with entries 1.0, 1.0, 1.0.

The box plots compare the exam scores of Ms. Dobson’s class to the rest of the students who took the test in the district.Which statement is true about the box plots? Select three options.Ms. Dobson’s class has a smaller range of scores.The district has a greater interquartile range.Fifteen is an outlier for the district’s scores.One hundred is an outlier for the district’s scores.In general, the district’s scores were better than those of Ms. Dobson’s class.

Ms. Dobson’s class has a smaller range of scores.

The district has a greater interquartile range.

Fifteen is an outlier for the district’s scores.

One hundred is an outlier for the district’s scores.

In general, the district’s scores were better than those of Ms. Dobson’s class.

The residents of three towns were polled to find the percentage of residents who take a vacation in the summer or in the winter. Which is the joint relative frequency of those in Town 2 who take a summer vacation? Round the answer to the nearest percent.

10%

25%

75%

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Unit Test — Unit test Answers

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