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.)