Question3: If the researcher in Question 1 increases the sample size to 64, calculate the 90% CI for the average GPA of college students with the new sample size.What is the standard error?What is the critical z or t score?What is the CI?Interpret the 90% CI. meInsertDrawDesignLayoutReferencesMailingsReviewView Tell meShareTimes New... 12-A AAa v ABIU ab x, x A v Avaste三 E 三▼Styles StylesPaneDictateQuestion 1: Calculate a 90% CI for the average GPA of college students from a sample of 49students with a mean GPA of 2.7 and a standard deviation of 0.1.1) What is the standard error? (Hint: SE ==)2) What is the critical z or t score? (Hint: use z table or t table)3) What is 90% CI? (Hint: CI = x±t * SE )4) If it is known that the population SD of students' GPA is 0.2, what is the 90% CI?(Hint: CI = x+Z* SE ).Question 2: If the researcher in Question 1 increases the confidence level to 95%, calculate the95% CI for the average GPA of college students1) What is the standard error?2) What is the critical z or t score?3) What is the 95% CI?4) Interpret the 95% CI.Question3: If the researcher in Question 1 increases the sample size to 64, calculate the 90% CIfor the average GPA of college students with the new sample size.1) What is the standard error?2) What is the critical z or t score?3) What is the CI?4) Interpret the 90% CI.153 FocusPage 1 of 1199 wordsEnglish (United States)

Answered: Question3: If the researcher in…

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Question3: If the researcher in Question 1 increases the sample size to 64, calculate the 90% CI for the average GPA of college students with the new sample size.

What is the standard error?
What is the critical z or t score?
What is the CI?
Interpret the 90% CI.

me
Insert
Draw
Design
Layout
References
Mailings
Review
View Tell me
Share
Times New... 12
-A A
Aa v A
BIU ab x, x A v Av
aste
三 E 三▼
Styles Styles
Pane
Dictate
Question 1: Calculate a 90% CI for the average GPA of college students from a sample of 49
students with a mean GPA of 2.7 and a standard deviation of 0.1.
1) What is the standard error? (Hint: SE ==)
2) What is the critical z or t score? (Hint: use z table or t table)
3) What is 90% CI? (Hint: CI = x±t * SE )
4) If it is known that the population SD of students' GPA is 0.2, what is the 90% CI?
(Hint: CI = x+Z* SE ).
Question 2: If the researcher in Question 1 increases the confidence level to 95%, calculate the
95% CI for the average GPA of college students
1) What is the standard error?
2) What is the critical z or t score?
3) What is the 95% CI?
4) Interpret the 95% CI.
Question3: If the researcher in Question 1 increases the sample size to 64, calculate the 90% CI
for the average GPA of college students with the new sample size.
1) What is the standard error?
2) What is the critical z or t score?
3) What is the CI?
4) Interpret the 90% CI.
15
3 Focus
Page 1 of 1
199 words
English (United States)

Expert Solution

Step 1

Given information

Sample size(n) = 64

Sample mean = 2.7

Sample standard deviation = 0.1

Significance level(α) = 1-0.90 = 0.1

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