Mathematics, 11.05.2021 17:40 lkelsey
A survey asked American adults cell phone owners if they browse the internet almost exclusively on their phone rather
than a computer or other device. Of 1150 respondents ages 35 and above, 12% answered yes. Of 1025 respondents ages
22 to 34, 18% answered yes.
(a) Calculate a 98% confidence interval for the difference in proportion who access the internet almost exclusively on their
cell phones for the two groups of Amerian adults. State all necessary conditions.
(b) Provide an interpretation of the interval in context. Is there evidence in support of a difference? Explain.
Answers: 3
Mathematics, 21.06.2019 16:30
The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?
Answers: 3
Mathematics, 21.06.2019 21:40
Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.
Answers: 3
A survey asked American adults cell phone owners if they browse the internet almost exclusively on t...
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