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57 23 Another interval estimate of the mean repair cost, using a sample size of 30, yielded the following 95% confidence 58 interval 59 $1,662 $1,906 60 What was the sample standard deviation? 61 $298 62 $307 63 $317 64 $327 65 66 Questions 24-28 are related to the following 67 In a random sample of 650 IUPUI undergraduate students 299 said they live with their parents while attending IUPUI. 68 This sample is used to build an interval estimate, with a 95% confidence level, of the proportion of all IUPUI undergraduate students who live with parents. 70 24 What is the point estimate of the population proportion? 71 0.48 72 0.46 73 0.44 74 0.42 75 76 25 The standard error of the sample proportion is, 77 a 0.0180 78 0.0188 79 0.0195 80 0.0204 81 82 26 The margin of error for the interval estimate is, 83 0.033 84 0.038 85 0.045 86 0.053 87 88 27 The interval estimate is, 89 0.422 0.498 90 0.412 0.508 91 0.400 0.520 92 0.385 0.535