Exercise 4.37

[1] 1

Exercise 4.41

b
[1] 0.104
c
[1] 2.12
[1] 1.54
d
[1] 3.33
[1] NA
e

When p is smaller the event is rarer, and the standard deviation is higher.

Exercise 7.47

[1] 2.37
[1] 0.668
[1] 1.23
[1] 0.784
[1] 0.116

Patients in the distracted eating group ate more food.

Exercise 7.50

a

The point estimate is 13.65 and the median is 14.

b

The standard deviation is 1.91 and the IQR is 2.

c
[1] 1.23
[1] 2.28
d

No, becuase those students take more credits.

e

The mean is found by dividing the cumulative hours taken by the students sampled.

[1] 1420

Exercise 7.51

a

sampling distribution

b

The distribution will be symmetric.

c
[1] 2.71
d

the mean will be more variable with a smaller sample size.

Exercise 7.54

a

Yes, the ANOVA method can be used.

b

The Independence hypothesis would suit the data.

c

The Acetone/AFT shows a difference.

d

WD-40 will have a difference because of the different values.

Exercise 7.57

The hypothesis should test the population mean. The null hypothesis should have a equal sign.

Exercise 7.58

The data would need to be more up to date and the standard deviation would need to be higher.