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Confidence interval estimate of the proportion of adults

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Reference no: EM132198043

1.) A survey showed that 850 of the 1600 adult respondents who live in a household without landline phones.

(a) Construct a 95% confidence interval estimate of the proportion of adults living in a household without landline phones. Show all work. Include description of how confidence interval was constructed.

(b) Describe the confidence interval in everyday language.

2.) A random sample of 900 SAT scores has a sample mean of 1100. Assume that SAT scores have a population standard deviation of 300.

(a) Construct a 95% confidence interval estimate of the mean SAT scores. Show all work. Include description of how confidence interval was constructed.

(b) Describe the confidence interval in everyday language.

Reference no: EM132198043

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