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The test scores of 20 students on a 100-point test were recorded. 72 92 93 84 73 74 85 81 77 55 83 87 68 | 63 70 76 69 66 73 86 (a) Create a stem and leaf plot for the data. (Enter numbers from smallest to largest separated by spaces. Enter NONE for stems with no values.) stem leaf 5. 6. 7 8 9 Can you reasonably assume that these test scores have been selected from a normal population? O Yes, the stem and leaf plot indicates that this is a reasonable assumption. O No, the stem and leaf plot indicates that this is not a reasonable assumption. (b) Calculate the mean and standard deviation of the scores. (Round your standard deviation to three decimal places.) mean standard deviation (c) If these students can be considered a random sample from the population of all students, find a 95% confidence interval for the average test score in the population. (Round your answers to three decimal places.) to

The test scores of 20 students on a 100-point test were recorded. 72 92 93 84 73 74 85 81 77 55 83 87 68 | 63 70 76 69 66 73 86 (a) Create a stem and leaf plot for the data. (Enter numbers from smallest to largest separated by spaces. Enter NONE for stems with no values.) stem leaf 5. 6. 7 8 9 Can you reasonably assume that these test scores have been selected from a normal population? O Yes, the stem and leaf plot indicates that this is a reasonable assumption. O No, the stem and leaf plot indicates that this is not a reasonable assumption. (b) Calculate the mean and standard deviation of the scores. (Round your standard deviation to three decimal places.) mean standard deviation (c) If these students can be considered a random sample from the population of all students, find a 95% confidence interval for the average test score in the population. (Round your answers to three decimal places.) to

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 20PFA
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The test scores of 20 students on a 100-point test were recorded. 72 92 93 84 73 74 85 81 77 55 83 87 68 63 70 76 69 66 73 86 (a) Create a stem and leaf plot for the data. (Enter numbers from smallest to largest separated by spaces. Enter NONE for stems with no values.) stem leaf 5 8 Can you reasonably assume that these test scores have been selected from a normal population? O Yes, the stem and leaf plot indicates that this is a reasonable assumption. O No, the stem and leaf plot indicates that this is not a reasonable assumption. (b) Calculate the mean and standard deviation of the scores. (Round your standard deviation to three decimal places.) mean standard deviation (c) If these students can be considered a random sample from the population of all students, find a 95% confidence interval for the average test score in the population. (Round your answers to three decimal places.) to
Transcribed Image Text:The test scores of 20 students on a 100-point test were recorded. 72 92 93 84 73 74 85 81 77 55 83 87 68 63 70 76 69 66 73 86 (a) Create a stem and leaf plot for the data. (Enter numbers from smallest to largest separated by spaces. Enter NONE for stems with no values.) stem leaf 5 8 Can you reasonably assume that these test scores have been selected from a normal population? O Yes, the stem and leaf plot indicates that this is a reasonable assumption. O No, the stem and leaf plot indicates that this is not a reasonable assumption. (b) Calculate the mean and standard deviation of the scores. (Round your standard deviation to three decimal places.) mean standard deviation (c) If these students can be considered a random sample from the population of all students, find a 95% confidence interval for the average test score in the population. (Round your answers to three decimal places.) to
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