Question

use data from 12 to solve 13&14

3 points QUESTION 12 Problem 19-25. A study conducted by researchers at Pennsylvania State University investigated whether time perception, an indication of a person's ability to concentrate, Is Impaired during nicotine withdrawal After a 24 hour smoking abstinence, 20 smokers were asked to estimate how much time had lapsed during a 45 second period Researchers wanted to see whether smoking abstinence had a negative impact on time perception, causing elapsed time to be overestimated. Suppose the resulting data on perceived lapsed time (in seconds) were as follows: the sample mean is 59 30.8-984 20 Please set up the problem

Answer 1

Answer:

n= 20, $\bar x$ =59.30, s= 9.84, $\mu$ =45

13)

Formula for test statistics is

- s/n

t = 59.30 – 45 9.84/20

t= 6.49914

t= 6.50

test statistics is = 6.50

14) degrees of freedom = n - 1

degrees of freedom = 20-1

degrees of freedom = 19