PSYCHOLOGY 5 MIDTERM EXAM 2 RAY GRIMM, Ph.D SHOW YOUR WORK and STATCRUNCH TABLES Name: ________________________________________ 1. SHOW YOUR WORK 8. SHOW YOUR WORK 9. SHOW YOUR WORK 10. SHOW YOUR WORK...

PSYCHOLOGY 5
MIDTERM EXAM 2
RAY GRIMM, Ph.D
SHOW YOUR WORK and STATCRUNCH TABLES
Name: ______________________________________
4)
Answer Graph (A)
5)
The standard deviation of the distribution of sample means would be equal to: standard Error of sample mean
Answer (C)
6)
We can use Single Sample t test
Answer (c)
7)
We can use Z for a single score
Answer (A)
Answer: Reject H0
9)
Answer (B)
10SHOW YOUR WORK
11)
Type-II Error: People in small towns are not friendlier than the general population when they are friendlier.
Answer (D)
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12
Significance testing tells researchers if the treatment is likely to be effective; effect sizes tell researchers how effective the treatment is likely to be.
Answer (A),
13)
If you change the sample size from N = 10 to N = 50 does the probability of making a Type I error is decreased
Answer : B
14)
Yes, Z – score (1.71) outside the the critical value region lies between (1.645)
Answer (B)
15)
The babies of young mothers will be significantly lighter than the weight of babies in the general population.
Answer : (A)
16. SHOW YOUR WORK
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17. SHOW YOUR WORK
18. SHOW YOUR WORK
Degrees of freedom(df) = n-1
=121-1
=120
From Stat chrunch Software we find Critical value of T
Critical value of T = 1.97793
19)
We can be 95% confident that the true population mean is between the upper boundary and lower boundary(75.0 , 76.80)
Answer (E)
20)
Smallest p-value = 0.114799 at t – value = -2.01
Answer: (B)
21. ATTACH STATCRUNCH TABLE IN ORDER TO GET CREDIT FOR THIS PROBLEM
We enter the data in stat church data sheet
Then we click Stat option and click T test with summary one sample
We get the output
Answer: D
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22)
The purpose the confidence interval is used to estimate the population parameter value
Answer: B
23)
The shape of the distribution is positively...