Homework Answers
Solution:-
In general 53% of the values in a data set lie at or above the 47th percentile.
88% of the values in a data set lie at or below the 88th percentile.
If a sample consists of 500 test scores, 440 of them would be at or below the 88th percentile.
If a sample consists of 500 test scores, 265 of them would be at or above the 47th percentile.
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In general, % of the values in a data set lie at or above the 47th...
In general, % of the values in a data set lie at or above the 45th...
In general, % of the values in a data set lie at or above the 45th percentile. % of the values in a data set lie at or below the 77th percentile. If a sample consists of 1500 test scores, of them would be at or below the 77th percentile. If a sample consists of 1500 test scores of them would be at or above the 45th percentile
Suppose you are working with a data set in which the mean = 100, and the...
Suppose you are working with a data set in which the mean = 100,
and the standard deviation = 20.
What is the z-score for Jeff, who has a raw score of 85?
What is the z-score for Ashley, who has a raw score of
125?
What is the raw score for Vale, who has a z-score of
-1.00?
What is the raw score for Michael, who has a z-score of
2.00?
What proportion of scores lie above Jeff’s...
In a symmetric distribution, what is the approximate percentage of data values that lie between two...
In a symmetric distribution, what is the approximate percentage of data values that lie between two standard deviations below the mean and one standard deviation above the mean? a) 84% 9. 10. Using this set of data: (122, 134, 126, 120, 128, 130, 120, 118, 125, 122, 126, 136, 118, 122, 124, 119), what is the percentile rank of 126 rounded to the nearest percent? a)41 11. Find the probability of getting a sum a) 5/18 (S or 6) when...
2. The data set below is a sample of the Mathematics test scores of 10 students:...
2. The data set below is a sample of the Mathematics test scores of 10 students: 56, 96, 78, 67, 60, 69, 85, 90, 89, 72 (a) Find the mean and median of the given test scores. (b) Is there a mode value for these scores? Why or why not? (c) Find the range and standard deviation (nearest hundredth) of these scores. (d) Find the percentile rank of 78 (e) What percent of these scores are within 1 standard deviation...
1) The standard deviation of the data set above is 9.74. How many of the 56 values lie within one-and-a-quarter standar...
1) The standard deviation of the data set above is 9.74. How
many of the 56 values lie within one-and-a-quarter standard
deviations of the mean?
2) In the data set below, what is the percentile rank of 14?
Weekly Exercise Hours 0 3.5 5 10 0 3.5 5 10 0.5 4 6 12 1 4712.5 1.5 4 713.5 2 4713.5 2 4713.5 2 4814 2 4.5 8.5 14 3 5 917.5 3 5 920 3 5 930 3 5 9.5...
C. Approximately 50% of the data lie above this value. D. Approximately 50% of the data lie wit...
C. Approximately 50% of the data lie above this value.
D. Approximately 50% of the data lie within 1 standard
deviation of this value.
The given data represents the results of a study on infant mortality rates (number of infant deaths per 1000 live births) by country. Full data set 85 133 93 91 114 94 93 72 139 94 98 121 72 105 Use the data table to answer the following questions. a. Find the first quartile (Q1) and...
Which of the following is an example of a data set with 5 values for which...
Which of the following is an example of a data set with 5 values for which the standard deviation is zero. a-2,-1,0,1,2 b) 4,4,44,4 )1,2,3,4,5 d -5,-3,0,3,5 Question 5 If the test scores of a class of 35 students have a mean of 71.1 and the test scores of another class of 28 students have a mean of 67.4, then the mean of the combined group is a67.750 b 69.250 c69.456 66.956
Compare the z-scores to decide which of the following x-values lie the greatest distance above the...
Compare the z-scores to decide which of the following x-values lie the greatest distance above the mean and the greatest distance below the mean. a.x:100, μ:50, σ-25 c·xz 0, μ = 200, σ 100 a. The z-score is Type an integer or decimal rounded to two decimal places as needed.) b. The z-score is (Type an integer or decimal rounded to two decimal places as needed.) c. The z-score is Type an integer or decimal rounded to two decimal places...
Consider a data set containing the following values: 67, 94, 82, 80, 97, 99, 78, 91....
Consider a data set containing the following values: 67, 94, 82, 80, 97, 99, 78, 91. The mean of the given value is 86. The squares of the scores are calculated as follows: 4,489, 8,836, 6,724, 6,400, 9,409, 9,801, 6,084, 8,281. If the preceding scores are sample data, the sum of squares are? If the preceding scores are population data, the SS is? If preceding scores in a sample data, the simple standard deviation is? and the sample variance is?...
2119a review 21242-Monday Test MAT 1272 Practice Exercises for testi 1. Use the following 20 values:...
2119a review 21242-Monday Test MAT 1272 Practice Exercises for testi 1. Use the following 20 values: 222, 233, 254, 241, 251, 268, 276, 220, 238, 253,249, 236, 247, 256, 261, 227, 257, 244, 239, 242 to perform the following tasks: a) Construct a frequency distribution table using 6 classes b) Draw a histogram for the frequency distribution in part (a). 2. The data set below is a sample of the Mathematics test scores of 10 students: 56, 96, 78, 67,...
In general, % of the values in a data set lie at or above the 45th percentile. % of the values in a data set lie at or below the 77th percentile. If a sample consists of 1500 test scores, of them would be at or below the 77th percentile. If a sample consists of 1500 test scores of them would be at or above the 45th percentile
Suppose you are working with a data set in which the mean = 100,
and the standard deviation = 20.
What is the z-score for Jeff, who has a raw score of 85?
What is the z-score for Ashley, who has a raw score of
125?
What is the raw score for Vale, who has a z-score of
-1.00?
What is the raw score for Michael, who has a z-score of
2.00?
What proportion of scores lie above Jeff’s...
In a symmetric distribution, what is the approximate percentage of data values that lie between two standard deviations below the mean and one standard deviation above the mean? a) 84% 9. 10. Using this set of data: (122, 134, 126, 120, 128, 130, 120, 118, 125, 122, 126, 136, 118, 122, 124, 119), what is the percentile rank of 126 rounded to the nearest percent? a)41 11. Find the probability of getting a sum a) 5/18 (S or 6) when...
1) The standard deviation of the data set above is 9.74. How
many of the 56 values lie within one-and-a-quarter standard
deviations of the mean?
2) In the data set below, what is the percentile rank of 14?
Weekly Exercise Hours 0 3.5 5 10 0 3.5 5 10 0.5 4 6 12 1 4712.5 1.5 4 713.5 2 4713.5 2 4713.5 2 4814 2 4.5 8.5 14 3 5 917.5 3 5 920 3 5 930 3 5 9.5...
C. Approximately 50% of the data lie above this value.
D. Approximately 50% of the data lie within 1 standard
deviation of this value.
The given data represents the results of a study on infant mortality rates (number of infant deaths per 1000 live births) by country. Full data set 85 133 93 91 114 94 93 72 139 94 98 121 72 105 Use the data table to answer the following questions. a. Find the first quartile (Q1) and...
Which of the following is an example of a data set with 5 values for which the standard deviation is zero. a-2,-1,0,1,2 b) 4,4,44,4 )1,2,3,4,5 d -5,-3,0,3,5 Question 5 If the test scores of a class of 35 students have a mean of 71.1 and the test scores of another class of 28 students have a mean of 67.4, then the mean of the combined group is a67.750 b 69.250 c69.456 66.956
Compare the z-scores to decide which of the following x-values lie the greatest distance above the mean and the greatest distance below the mean. a.x:100, μ:50, σ-25 c·xz 0, μ = 200, σ 100 a. The z-score is Type an integer or decimal rounded to two decimal places as needed.) b. The z-score is (Type an integer or decimal rounded to two decimal places as needed.) c. The z-score is Type an integer or decimal rounded to two decimal places...
2119a review 21242-Monday Test MAT 1272 Practice Exercises for testi 1. Use the following 20 values: 222, 233, 254, 241, 251, 268, 276, 220, 238, 253,249, 236, 247, 256, 261, 227, 257, 244, 239, 242 to perform the following tasks: a) Construct a frequency distribution table using 6 classes b) Draw a histogram for the frequency distribution in part (a). 2. The data set below is a sample of the Mathematics test scores of 10 students: 56, 96, 78, 67,...
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