Regression Models — Cumulative exam

Question 1

The histogram represents boiling temperatures, in degrees Celsius, of tap water and of a saltwater mix.The median boiling temperature of the tap water is 100°C. The median boiling temperature of the salt water is 102°C. Which statement about the means is most likely true?

Revolt · Accepted Answer

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

Question 2

Which statements are true about the data used to create the histogram? Select three options.

Revolt · Accepted Answer

The mean is the best comparison of the measures of center.; The juniors tended to have higher essay scores than the sophomores.; A histogram is the best way to show that both distributions are nearly symmetric.

Question 3

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

Revolt · Accepted Answer

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

Question 4

The table shows the wavelength of the sound produced by keys on a piano x keys away from the A above middle C.

Revolt · Accepted Answer

49.44 cm

Question 5

Janna is making a prediction of the frequency of a key that is 12 keys from middle C.

Revolt · Accepted Answer

extrapolation, because a key that is 12 keys from middle C is outside the data set

Regression Models — Cumulative exam Answers

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