Smartphone: Among 240 smartphone owners aged 18-24 surveyed, 108 said their phone was an Android phone. Part 1 of 3 (a) Find a point estimate for the proportion of smartphone owners aged 18-24 who have an Android phone. Round the answer to at least three decimal places. The point estimate for the proportion of smartphone owners aged 18-24 who have an Android phone is [45]

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Assume that an advertisement claimed that 38% of smartphone owners aged 18-24 have an Android phone. Does the confidence interval contradict this claim? ANSWER PT 3
Smartphone: Among 240 smartphone owners aged 18-24 surveyed, 108 said
their phone was an Android phone.
Part 1 of 3
(a) Find a point estimate for the proportion of smartphone owners aged
18-24 who have an Android phone. Round the answer to at least three
decimal places.
The point estimate for the proportion of smartphone owners aged 18-24
who have an Android phone is [45]
Alternate Answer:
The point estimate for the proportion of smartphone owners aged 18-
24 who have an Android phone is 0.450.
Part 2 of 3
(b) Construct a 90% confidence interval for the proportion of smartphone
owners aged 18-24 who have an Android phone. Round the answers to at
least three decimal places.
A 90% confidence interval for the proportion of smartphone owners aged
18-24 who have an Android phone is 397 <p<.503
Alternate Answer:
A 90% confidence interval for the proportion of smartphone owners
aged 18-24 who have an Android phone is 0.397<p<0.503.
Part: 2/3
Part 3 of 3
(c) Assume that an advertisement claimed that 38% of smartphone
owners aged 18-24 have an Android phone. Does the confidence interval
contradict this claim?
The confidence interval (Choose one) contradict the claim, because 0.38
(Choose one)
contained in the confidence interval.
Transcribed Image Text:Smartphone: Among 240 smartphone owners aged 18-24 surveyed, 108 said their phone was an Android phone. Part 1 of 3 (a) Find a point estimate for the proportion of smartphone owners aged 18-24 who have an Android phone. Round the answer to at least three decimal places. The point estimate for the proportion of smartphone owners aged 18-24 who have an Android phone is [45] Alternate Answer: The point estimate for the proportion of smartphone owners aged 18- 24 who have an Android phone is 0.450. Part 2 of 3 (b) Construct a 90% confidence interval for the proportion of smartphone owners aged 18-24 who have an Android phone. Round the answers to at least three decimal places. A 90% confidence interval for the proportion of smartphone owners aged 18-24 who have an Android phone is 397 <p<.503 Alternate Answer: A 90% confidence interval for the proportion of smartphone owners aged 18-24 who have an Android phone is 0.397<p<0.503. Part: 2/3 Part 3 of 3 (c) Assume that an advertisement claimed that 38% of smartphone owners aged 18-24 have an Android phone. Does the confidence interval contradict this claim? The confidence interval (Choose one) contradict the claim, because 0.38 (Choose one) contained in the confidence interval.
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