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Karen wants to advertise how many chocolate chips are in each Big Chip cookie at her...

Karen wants to advertise how many chocolate chips are in each Big Chip cookie at her bakery. She randomly selects a sample of 65 cookies and finds that the number of chocolate chips per cookie in the sample has a mean of 16.3 and a standard deviation of 3.8. What is the 90% confidence interval for the number of chocolate chips per cookie for Big Chip cookies? Enter your answers accurate to 4 decimal places. [ , ] (Report and round to 4 decimal places)

Test the claim that the proportion of people who own cats is smaller than 50% at the 0.10 significance level. The null and alternative hypothesis would be: H 0 : μ ≥ 0.5 H 1 : μ < 0.5 H 0 : μ = 0.5 H 1 : μ ≠ 0.5 H 0 : p = 0.5 H 1 : p ≠ 0.5 H 0 : p = 0.5 H 1 : p < 0.5 H 0 : p = 0.5 H 1 : p > 0.5 H 0 : μ ≤ 0.5 H 1 : μ > 0.5 The test is: left-tailed two-tailed right-tailed Based on a sample of 200 people, 44% owned cats The test statistic is: (to 3 decimals) The p-value is: (to 4 decimals) Based on this we: Fail to reject the null hypothesis Reject the null hypothesis

We wish to estimate what percent of adult residents in a certain county are parents. Out of 400 adult residents sampled, 92 had kids. Based on this, construct a 95% confidence interval for the proportion p of adult residents who are parents in this county. Give your answers as decimals, to 4 places. Answer = ± (Note this is NOT in interval form, so check your answer carefully)

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