Bundle > Sophia __ Intro to Stats Unit 1, 2,3, 4, and 5 Milestones Questions and Answers Latest Updated Already Passed
You passed this Milestone 22 questions were answered correctly. 2 questions were answered incorrectly. 1 Mrs. Pellegrin has weighed 5 packages of cheese and recorded the weights as 10.2 oz, 10.5 o... z, 9.3 oz, 9.8 oz, and 10.0 oz. She calculated the standard deviation to be 0.45 oz. Select the 95% confidence interval for Mrs. Pellegrin's set of data. 9.4 to 10.52 9.53 to 10.39 9.34 to 10.44 9.48 to 10.44 RATIONALE In order to get the 95% CI , we first need to find the critical t-score. Using a t-table, we need to find (n-1) degrees of freedom, or (5-1) = 4 df and the corresponding CI Using the 95% CI in the bottom row and 4 df on the far left column, we get a t-critical score of 2.776. We also need to calculate the mean: So we use the formula to find the confidence interval: The lower bound is: 9.96 -0.56 = 9.40 The upper bound is: 9.96+0.56 = 10.52 CONCEPT Confidence Intervals Using the T-Distribution 2 A school is gathering some data on its sports teams because it was believed that the distribution of boys and girls were evenly distributed across all the sports. This table lists the number of boys and girls participating in each sport. Boys Girls Tennis 18 30 Soccer 42 15 Swimming 12 18 Select the observed and expected frequencies for the boys participating in soccer. Observed: 42 Expected: 24 Observed: 42 Expected: 22.5 Observed: 57 Expected: 22.5 Observed: 57 Expected: 24 RATIONALE If we simply go to the chart then we can directly see the observed frequency for boys participating in soccer is 42. To find the expected frequency, we nee [Show More]
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Statistics> QUESTIONS & ANSWERS > Sophia __ Intro to Stats Unit 2 Milestone 2 Latest Update Already Passed (All)
24 questions were answered correctly. 2 questions were answered incorrectly. 1 In which of these cases should the median be used? When the data has small variance When data has no outliers When...
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Statistics> QUESTIONS & ANSWERS > Sophia __ Intro to Stats Unit 1 Milestone 1 Questions and Answers Already Passed (All)
24 questions were answered correctly. 5 questions were answered incorrectly. 1 A hunter is practicing his aim using a practice target. He takes 5 shots. All 5 shots hit the target, but they do not...
By Nutmegs
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Statistics> QUESTIONS & ANSWERS > Sophia __ Intro to Stats Unit 4 Milestone 4 Latest Updated Already Passed (All)
16 questions were answered correctly. 2 questions were answered incorrectly. 1 For ten students, a teacher records the following scores of two assessments, Quiz 1 and Test. Quiz 1 (x) Test (y) 15...
By Nutmegs
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Statistics> QUESTIONS & ANSWERS > Sophia __ Intro to Stats Unit 5 Milestone 5 Questions and Answers Already Passed (All)
You passed this Milestone 21 questions were answered correctly. 3 questions were answered incorrectly. 1 What value of z* should be used to construct a 97% confidence interval of a population mean...
By Nutmegs
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Statistics> QUESTIONS & ANSWERS > Sophia __ Intro to Stats Unit 3 Milestone 3 Latest Updated and Graded A (All)
You passed this Milestone 21 questions were answered correctly. 6 questions were answered incorrectly. 1 Which of the following is a property of binomial distributions? All of the observations ma...
By Nutmegs
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Uploaded On
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