Data Analysis — Test Answers

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The median boiling temperature of the tap water is 100 degrees mathrm cap c The median boiling temperature of the salt water is 102 degrees mathrm cap c Which statement about the means is most likely true?

The mean of the tap water boiling temperatures is about 4 degrees less than the mean of the saltwater boiling temperatures.

The mean of the tap water boiling temperatures is about 2 degrees less than the mean of the saltwater boiling temperatures.

The mean of the tap water boiling temperatures is about 3 degrees less than the mean of the saltwater boiling temperatures.

The mean of the tap water boiling temperatures is about 1 degree greater than the mean of the saltwater boiling temperatures.

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Which statements are true about the data used to create the histogram? Choose three correct answers.

The mean is the best comparison of the measures of center.

A histogram is the best way to show that both distributions are nearly symmetric.

The interquartile range is the best comparison of the measure of variability.

The medians of both data sets are equal.

The juniors tended to have higher essay scores than the sophomores.

Which model best represents the data?

y is equal to 27 x minus 4

y is equal to 34 times 1 point 2 0 4 to the x th power

y is equal to 47 times 1 point 1 9 1 to the x th power

y is equal to 26 point 9 x minus 1 point 3

How many rain gauges recorded rainfall?

Which phrases describe the relationship between heart rate and daily intake of caffeine? Choose two correct answers.

increasing heart rate

constant correlation

decreasing heart rate

negative correlation

positive correlation

What statement is true about the mean of the sums of the two spinners?

The mean is 16.

The mean is the same as the median.

The mean is the same as the range.

The mean is 12.

What measure of center can be determined and compared in the box plots?

IQR

range

mean

median

Which values are correct? Choose three correct answers.

A is equal to 15

b is equal to 18

e is equal to 31

d is equal to 35

c is equal to 23

How does the word count of an essay relate to its score in the contest?

Word count tends to remain constant as the score decreases.

Word count tends to decrease as the score decreases.

Word count tends to increase as the score decreases.

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

When x is equal to 4 , what is the residual?

negative 1

negative 3

Which are the missing residual values?

g is equal to 2 and h is equal to negative 1

g is equal to negative 2 and h is equal to 1

g is equal to negative 28 and h is equal to negative 39

g is equal to 28 and h is equal to 39

What is the correlation coefficient for the data shown in the table?

Which statement best describes the shape of the graph?

The graph is perfectly symmetrical.

The graph is skewed right.

The graph is nearly symmetrical.

The graph is skewed left.

What is the variance of the data?

What is the variance of the data set? Round to the nearest hundredths.

0 point 4 0

1 point 1 5

2 point 1 4

0 point 7 2

Which range of time values describes the entire interval over which she would be interpolating?

0 to 30 minutes

18 to 30 minutes

0 to 18 minutes

0 to 5 minutes

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

1 point 5

2 point 5

Which could be a conditional relative frequency table?

Table with 4 columns and 4 rows.Row 1: Column 1, empty; Column 2, 'cap A'; Column 3, 'cap b'; Column 4, 'Total' Row 2: Column 1, 'cap c'; Column 2, '0 point 2 5'; Column 3, '0 point 7 5'; Column 4, '1 point 0' Row 3: Column 1, 'cap d'; Column 2, '0 point 3 5'; Column 3, '0 point 6 5'; Column 4, '1 point 0' Row 4: Column 1, 'Total'; Column 2, '0 point 3 0'; Column 3, '0 point 7 0'; Column 4, '1 point 0'

Table with 4 columns and 4 rows.Row 1: Column 1, empty; Column 2, 'cap A'; Column 3, 'cap b'; Column 4, 'Total' Row 2: Column 1, 'cap c'; Column 2, '0 point 6 5'; Column 3, '0 point 3 5'; Column 4, '1 point 0' Row 3: Column 1, 'cap d'; Column 2, '0 point 3 5'; Column 3, '0 point 6 5'; Column 4, '1 point 0' Row 4: Column 1, 'Total'; Column 2, '1 point 0'; Column 3, '1 point 0'; Column 4, '1 point 0'

Table with 4 columns and 4 rows.Row 1: Column 1, empty; Column 2, 'cap A'; Column 3, 'cap b'; Column 4, 'Total' Row 2: Column 1, 'cap c'; Column 2, '0 point 7 5'; Column 3, '0 point 2 5'; Column 4, '0 point 5 0' Row 3: Column 1, 'cap d'; Column 2, '0 point 2 5'; Column 3, '0 point 7 5'; Column 4, '0 point 5 0' Row 4: Column 1, 'Total'; Column 2, '0 point 5 0'; Column 3, '0 point 5 0'; Column 4, '1 point 0'

Table with 4 columns and 4 rows.Row 1: Column 1, empty; Column 2, 'cap A'; Column 3, 'cap b'; Column 4, 'Total' Row 2: Column 1, 'cap c'; Column 2, '0 point 2 5'; Column 3, '0 point 2 5'; Column 4, '0 point 5 0' Row 3: Column 1, 'cap d'; Column 2, '0 point 2 5'; Column 3, '0 point 2 5'; Column 4, '0 point 5 0' Row 4: Column 1, 'Total'; Column 2, '0 point 5 0'; Column 3, '0 point 5 0'; Column 4, '1 point 0'

The frequency table shows the results of a survey comparing the number of beach towels sold for full price and at a discount during each of the three summer months. Beach Towel Sales Full Price Discounted Total Month 1 49 1 50 Month 2 120 5 125 Month 3 101 24 125 Total 270 30 300 The store owner converts the frequency table to a conditional relative frequency table by row. Beach Towel Sales Full Price Discounted Total Month 1 0 point 9 8 0 point 0 2 1 point 0 Month 2 0 point 9 6 0 point 0 4 1 point 0 Month 3 0 point 8 0 8 0 point 1 9 2 1 point 0 Total cap x cap y 1 point 0 Which value should he use for cap x ? Round to the nearest hundredth.

0 point 8 9

0 point 9 6

0 point 9 2

0 point 9 0

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, 12 Which box plot correctly represents the data?

Image with description A solid number line with a box-and-whisker plot. The number line is labeled from 0 to 16 in increments of 2. The left whisker extends from 3 to 4. The box spans from 4 to 12, with a vertical line inside the box at 7. The right whisker extends from 12 to 13.

Image with description A solid number line with a box-and-whisker plot. The number line is labeled from 0 to 16 in increments of 2. The left whisker extends from 2 to 4. The box spans from 4 to 12, with a vertical line inside the box at 8. The right whisker extends from 12 to 14.

Image with description A solid number line with a box-and-whisker plot. The number line is labeled from 0 to 16 in increments of 2. The left whisker extends from 4 to 6. The box spans from 6 to 12, with a vertical line inside the box at 8. The right whisker extends from 12 to 14.

Image with description A solid number line with a box-and-whisker plot. The number line is labeled from 0 to 16 in increments of 2. The left whisker extends from 3 to 5. The box spans from 5 to 12, with a vertical line inside the box at 7. The right whisker extends from 12 to 13.

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