1 1 point A simple random sample of four young American wome

1. (1 point) A simple random sample of four young American women is selected and their heights measured. The four heights, in inches, are: 63 69 62 66. a. Suppose the heights of young American women, in inches, are Normally distributed with unknown mean and it is known that the population standard deviation is = 2.4. Based on the data above, compute the test statistic you would use to perform the significance test versus . b. Suppose the heights of young American women, in inches, are Normally distributed with unknown mean and the standard deviation of the population is not known. Based on the data above, compute the test statistic you would use to perform the significance test versus .

Solution

a) The mean height of the womens in the sample is 65.

Since the population standrad deviation is given so the test static f the normal test is to be used

b) As the population standrad devaition is not given, So use t- test