# 1.Subtract 20

from each item in the given sample, and compute the mean and standard deviation of the new sample.

30,26,37,38,45,42,30

The mean of the new sample is 15.43 (correct)

The standard deviation of the new sample is ____

(Simplify your answer. Typean integer or decimal rounded to the nearest hundredth as needed.)

2.Compute the mean and standard deviation for the sample below, rounding each to the nearest hundredth.

11, 14, 18, 19, 21, 23, 26

The mean of the sample is 18.86 (correct).

The standard deviation of the sample is ________.

(Typean integer or a decimal. Round to two decimal places as needed.)

3.Find (a) the range, and (b) the standard deviation for the given sample.

84.89,84.55,85.11,84.82,85.22,84.79,85.92,85.77,84.13

(a) Find the range of the given sample.

Range=1.79(correct)

(b) Find the standard deviation of the given sample.

s=_______

(Simplify your answer. Typean integer or decimal rounded to the nearest hundredth as needed.)

3.Find the range and standard deviation of the set of data.

2, 7, 9, 4, 7, 8, 5

The range is 7.

The standard deviation is ______.

(Round to the nearest thousandth as needed.)

4.Find the range and standard deviation of the set of data.

41, 32, 36, 35, 35, 38, 35

The range is ______.

5.For the given list of data, calculate the following.

(a) the mean (b) the median (c) the mode or modes (if any)

129, 130, 137, 120, 133, 120, 129, 126

(a) The mean is ____.

(Simplify your answer. Typean integer or a decimal.)

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