Can someone answer question 2 Assume the average number of times that a typical
ID: 2908837 • Letter: C
Question
Can someone answer question 2
Assume the average number of times that a typical American say a word that is considered to be profane is 4 times per day with a standard deviation of 5.6. A sample of 15 students from your university is found to vocalize 3.4 profane words per day. Assume that we expect the students at your university to vocalize fewer profane words. Conduct directional (left-tailed) hypothesis test to determine if there is a difference between you university's population and the general population. What is the z-observed value for the test?
.11
-.11
-0.41
0.41
2 points
QUESTION 2
Based on your calculation from the above example, what would your conclusion be regarding the null hypothesis?
I fail to reject the null hypothesis; there is NOT a statistically significant difference between the means.
I reject the null hypothesis; there is a significant difference between the means.
I fail to reject the null hypothesis; there is a significant difference between the means.
I reject the null hypothesis, there is NOT a significant difference between the means.
.11
-.11
-0.41
0.41
Explanation / Answer
Ans:
1)
z=(3.4-4)/(5.6/SQRT(15))
z=-0.41
2)
As,z statistic does not fall in critical rejection region,we fail to reject the null hypothesis.
(if alpha=0.05,then rejection region is: z<-1.645)
Correct option is:
I fail to reject the null hypothesis; there is NOT a statistically significant difference between the means.