PART ONE

Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval for a sample of size 176 with 35.2% successes. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places. 99% C.I. = (0.352,0.093)Incorrect Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.

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Assume that a sample is used to estimate a population proportion p. Find the 95% confidence interval for a sample of size 391 with 70.1% successes. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places. 95% C.I. = (0.656,0.746)Incorrect Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.

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You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures:

37.8

71.2

63.9

49.3

72.8

80.6

Find the 98% confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places (because the sample data are reported accurate to one decimal place). 98% C.I. = Answer should be obtained without any preliminary rounding.

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Assume that a sample is used to estimate a population proportion . Find the margin of error M.E. that corresponds to a sample of size 498 with a mean of 38.3 and a standard deviation of 10.9 at a confidence level of 99.8%. Report ME accurate to one decimal place because the sample statistics are presented with this accuracy. M.E. = 3.1 Incorrect Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.

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You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures:

82.3

81.9

57.9

86

56.1

53.3

55.9

53.2

Find the 98% confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places (because the sample data are reported accurate to one decimal place). 98% C.I. = Answer should be obtained without any preliminary rounding.

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Assume that a sample is used to estimate a population mean . Find the 99% confidence interval for a sample of size 42 with a mean of 68.8 and a standard deviation of 12.8. Enter your answer as an open-interval (i.e., parentheses) accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). 99% C.I. = Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.