The following are the shoe sizes (inches) of 20 female students  What is the mean, variance, standard deviation? What is the z-score of size 8"? How many percent of students have a shoe size between 5” to 6.5”? _____%

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A: given data  normal distributionμ = 64.5 inchesσ = 3.1 inches

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Q: In a sample of 152 people the average score was 74 with a standard deviation of 6. What is the…

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A: Class Frequency 1 - 5 2 6 - 10 5 11 - 15 2 16 - 20 1

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A: Sample size=n=100, mean μ=2.4, standard deviations σ=1 P(a<x̄<b)=60%  Find a and b

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A: Let , X be the lengths of a commercially caught fish with mean μ=25 cm and standard deviation σ=5 cm…

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A: given data μ = 70.8σ = 12.4x = 80z = ?

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A: Test statistic:Denote μ as the claimed mean; μ = 384. In a random sample of n = 79, the sample mean…

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A: The mean is 110 and the standard deviation is 14.

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A: Given Data Population Mean,μ = 100.0 Population Standard Deviation,σ = 15.0

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Q: days in Buffalo, NY: {17, 26, 3, 13, 29, 34, 32, 30, 41} Which of the following values represent the…

A: Given data, 17,26,3,13,29,34,32,30,41   Standard deviation=? Variance =?

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Q: 2. The Assignment 1 marks for several groups have come in and the group sizes, means and standard…

A: Group No.Group sizeMeanSD11075428892312816

Q: The mean deviation of the data(1 * :2,9,9,3,6,9,4 from the mean is 2.23 3.23 O 2.57 O 3.57 O

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Q: standard deviation using the data in the table. No 1 2 3 4 5 6 Number of points 94 95 100 103 92 82

A: Given : No 1 2 3 4 5 6Number of points 94 95 100 103 92 82

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Q: IQ scores have a bell-shaped distribution with a mean of 100 and a standard deviation of 15. a. What…

A: Given DataMean = 100Standard Deviation = 15

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A: 2.3, 1.0, 2.1, 6.5, 2.8, 7.8, 1.7, 2.9, 4.4, 5.1, 2.0

Q: Let's assume that the height of adult women in the United States follows a normal distribution with…

A: Let X be the height of adult women in the United States. The random variable X follows a normal…

Q: the standard deviation of the data in following distribution: 12 13 14 32 15 21 16 15 17 8 13 20

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A: Given Mean=2 x-bar=1.99 Standard deviations=0.3 n=62

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Q: the mean is 146, and standard deviation is 35. A score of 181 is how many z-scores above the mean?

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Q: The average production cost for major movies is 57 million dollars and the standard deviation is 23…

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Q: The average Act score for a class of 33 students is 21.65, with s=2.83. Covert each of the following…

A: According to the provided information,  μ=21.65σ=2.83 i) x = 19 Using z-score formula, z=x-μσ…