A Study of Negative Suggestion (Douglas, Grebert, Webb, 2014). This group were interested in the effects of negative suggestion on members of the public. They placed a sign with the words “do not look up” in a highly visible area at the northern end of the Goodwill Bridge, and recorded whether or not people looked at the sign, and if so, for how long they looked up. They also recorded other variables such as gender, age group, attire, activity and time of day (am/pm). Following are some descriptive statistics of their analysis, for only the 109 people who looked up. The variable LogTime is the logarithm to base 10 of the time they looked up for.

What is the value of in this confidence interval?

Question 2

Question 3

What is the value of b in the confidence interval from Question 1?

Question 4

What is the value of c in the confidence interval from Question 1?

Question 5

What is the value of d in the confidence interval from Question 1?

Question 6

Question 7

If e > f, what is the value of e in the confidence interval from Question 6?

Question 8

If e > f, what is the value of f in the confidence interval from Question 6?

Question 9

Question 10

What is the value of g in the confidence interval from Question 6?

Question 11

If ℎ corresponds with e, what is the value of ℎ in the confidence interval from Question 6?

Question 12

If i corresponds with f, what is the value of i in the confidence interval from Question 6?

Question 13

If ℎ corresponds with e, what is the value of j in the confidence interval from Question 6?

Question 14

If i corresponds with f, what is the value of k in the confidence interval from Question 6?

Question 15

What is the value of l in the confidence interval from Question 6?

Question 16

Question 17

The group were interested in whether the time of day (am or pm) made a significant difference to the mean lookup time. Following is a summary with regards to this variable,

Question 18

Is the statistical test from Question 17 a one-sided test or a two-sided test?

(a) one-sided test

(b) two-sided test

Question 19

When calculating the test statistic for the statistical test from Question 17, what is the value of the pooled sample standard deviation, S_p?

Question 20

What is the (positive) test statistic for the statistical test from Question 17?

Question 21

Question 22

Question 23

The group were also interested in constructing a 95% tolerance interval for 90% of log lookup times for bikers only.

What is the value of u in this tolerance interval?

Question 24

What is the value of v in the tolerance interval from Question 23?

Question 25

What is the value of w in the tolerance interval from Question 23?

Question 26

Question 27

Question 28

Question 29

What is the value of r in the confidence interval from Question 28?

Question 30

What is the value of s in the confidence interval from Question 28?

Question 31

Question 32

Question 33

Transcribed Image Text:

Descriptive Statistics: Log Time Total Variable Activity Count LogTime Bike Jog Walk Mean 17 -0.2536 8 0.105 84 0.0437 St Dev 0.2747 0.460 0.3512 Assuming that the log lookup time is normally distributed, a 90% confidence interval for the mean log lookup time for bike riders is given by, (a_b_₁a+b) where b is a percentage point from a distribution table. Descriptive Statistics: Log Time Total Variable Activity Count LogTime Bike Jog Walk Mean 17 -0.2536 8 0.105 84 0.0437 St Dev 0.2747 0.460 0.3512 Assuming that the log lookup time is normally distributed, a 90% confidence interval for the mean log lookup time for bike riders is given by, (a_b_₁a+b) where b is a percentage point from a distribution table.