Katy Perry is currently the most popular account on Twitter®with about 100 million followers.
Mr. Starnes wondered what proportion of Katy Perry’s Twitter followers are female, so he selected a random sample of 500 of Katy Perry’s followers. In the sample, 308 are female.
Check if the conditions for constructing a confidence interval for p are met. Select all that are met
Question 2
2.
Explain.
Question 3
3.
Mr. Starnes wondered what proportion of Katy Perry’s Twitter®followers are female, so he selected a random sample of 500 of Katy Perry’s followers. In the sample, 308 are female. Assume the conditions for inference are met.
(a) Determine the critical value z* for a 80% confidence interval for a proportion.
Round to the nearest hundredth
Question 4
4.
What is the point estimate for the proportion of Katy Perry’s Twitter followers that are female?
Round to the nearest Hundredth
Question 5
5.
What is the standard error of the statistic?
Round to the nearest hundredth
Question 6
6.
(b) Construct a 80% confidence interval for the proportion of all of Katy Perry’s Twitter followers who are female.
(_______ ,_______ )
Round to the nearest hundredth
Question 7
7.
(c) Interpret the interval from part (b).
Question 8
8.
Select each condition that is met.
Question 9
9.
Explain
Question 10
10.
Select each condition that is met.
Question 11
11.
Explain
Question 12
12.
Round to the nearest Hundredth
Question 13
13.
Determine the point estimate for the confidence interval
Round to the nearest Hundredth
Question 14
14.
Determine the standard error for the confidence interval
Round to the nearest Hundredth
Question 15
15.
(_______ ,_______ )
Round to the nearest Hundredth
Question 16
16.
Question 17
17.
Determine the critical z* value for a 90% confidence interval
Round to the nearest hundredth
Question 18
18.
Determine the point estimate
Round to the nearest hundredth
Question 19
19.
Determine the standard error
Round to the nearest hundredth
Question 20
20.
Find the 90% confidence interval
(_______ ,_______ )
Round to the nearest hundredth
Question 21
21.
Interpret the interval in context
Question 22
22.
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