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Smart phone: Among 240 cell phone owners aged 18-24 surveyed, 108 said their phone was an Android phone. Perform the following.
Part 1 of 3 (a) Find a point estimate for the proportion of cell phone 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 cell phone owners aged $18-24$ who have android phone is 0.450 .
Part 2 of 3 (b) Construct a $90 \%$ confidence interval for the proportion of cell phone owners aged 18-24 who have an Android phone. Round the answer to at least three decimal places.
A $90 \%$ confidence interval for the proportion of cell phone 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 cell phone owners aged 18-24 have an Android phone. Does the confidence interval contradict this claim? claim?
The confidence interval $\square$ (Choose one) contradict the claim, because 0.38 (Choose one) contained in the confidence interval. Skip Part Check Save For Later Submit Assignm ( 2024 MaGraw Hill LLC. All Rights Reserved. Terms of Use I Privacy Center I Acces: