Use this data for questions 1720 population average 100 Sam

Use this data for questions 17-20:

population average = 1.00,  

Sample standard deviation \"s\" = .15   

Mean of X = .85  

N = 17

Which statistical test would tell if the Mean of X were significantly higher than mu?

Question 17 options:

Z-test

t-test

Beta Test

Central Limit Theorem

Question 18 (1 point)

Alpha is set at .05 for this One-Tailed test. What are the degrees of freedom?

Question 18 options:

28

15

16

18

Question 19 (1 point)

What is the tabled, or critical value for this test? Hint See page 284 (2nd edition) and 415-416 (3rd edition), and df (degrees of freedom) is N-1.

Question 19 options:

1.740

1.746

1.701

1.703

Question 20 (1 point)

Is this difference between the mean of X and mu statistically significant? (Hint, is the calculated t larger than the tabled t value? If yes, it is significant.

Question 20 options:

Yes

No

Can\'t tell from the data given

	Z-test
	t-test
	Beta Test
	Central Limit Theorem

Solution

population average = 1.00,  

Sample standard deviation \"s\" = .15   

Mean of X = .85  

N = 17

Question 17)

Option b . t-test

Because sample size is too small (<30).

Question 18)

Option c . 16

Degrees of freedom = N-1 = 17-1 =16

Question 19)

Option b . 1.746

dF =16

alpha =0.05

From t table for one tail , critical value = 1.746

Question 20)

Option b . No

t = (X-bar - 1)/(SD/sqrt(17))

= (0.85 - 1)/(0.15/sqrt(17))

= -4.12 < 1.746

Hence Not Significant