50f 15 (0 complete) This C This Question: 1 pt else changes.) State whether each

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50f 15 (0 complete) This C This Question: 1 pt else changes.) State whether each of the following changes would make a confidence interval wider or narrower. (Assume that nothing Changing from a 95% confidence level to a 90% confidence level. b. Changing from a sample size of 300 to a sample size of 25. c. Changing from a standard deviation of 15 pounds to a standard deviation of 25 pounds Click the icon to view the t-table. a. How will changing frorm a 95% confidence level to a 90% confidence level affect the width of the confidence interval? O A. The interval will become wider. B. The interval will become narrower. ° C. This change will not affect the width of the interval. b. How will changing from a sample size of 300 to a sample size of 25 affect the width of the confidence interval? O A. The interval will become wider. O B. The interval will become narrower C. This change will not affect the width of the interval. c. How will changing from a standard deviation of 15 pounds to a standard deviation of 25 pounds affect the width of the confidence intervai? 0 A. The interval will become narrower. OR The intanral will herome widor Click to select your answer. 29

Explanation / Answer

1. B is the right answer. higher the confidence, more the width of interval

2. A, more the sample size, smaller the interval

3. B, more than standard deviation, more the width

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