Author Question: Recently, an automobile insurance company performed a study of a random sample of 15 of its ... (Read 79 times)

sdfghj · **on:** Jun 24, 2018

Recently, an automobile insurance company performed a study of a random sample of 15 of its customers to determine if there is a positive relationship between the number of miles driven and the age of the driver.

The sample correlation coefficient is r = .38. Given this information, and assuming that the test is to be performed at the .05 level of significance, which of the following is the correct test statistic?A) t = 1.4812
B) t = 1.7709
C) z = 2.114
D) t = 1.74

Question 2

The owners of Hal's Cookie Company have collected sales data for the past 8 months. These data are shown as follows:

Month Sales
1 100
2 130
3 90
4 120
5 100
6 80
7 120
8 90

Using a smoothing constant equal to 0.20 and starting forecast in period 1 of 100, the forecast value for period 9 is approximately 104.2.
Indicate whether the statement is true or false