Homework Answers
7. Solution :
=> Answer :- 14
Given that n = 25 , μ = 14 and σ = 2
=> the mean of the sampling distribution of the mean is μm = μ
= 14
8. Solution :
=> Answer :- 0.0938
Given that n = 64 , μ = 12 and σ = 0.75
=> the standard deviation of the sampling distribution of the mean is σm = σ/sqrt(n)
= 0.75/sqrt(64)
= 0.0938
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#7 and #8
0.4 pts Question 7 In a normal distribution with μ for samples of...
7) In a normal distribution with μ=14 and σ=2, find the mean of the distribution of...
7) In a normal distribution with μ=14 and σ=2, find the mean of the distribution of sample means for samples of size 25. 8) In a normal distribution with μ=12 and σ=0.75, find the standard deviation of the distribution of sample means for samples of size 64. (Round to the nearest ten-thousandth.) 11)Your company manufactures hot water heaters. The life spans of your product are known to be normally distributed with a mean of 13 years and a standard deviation...
#5-7 Question 5 0.4 pts What is the z-score representing the fifteenth percentile, P15. (Round to...
#5-7
Question 5 0.4 pts What is the z-score representing the fifteenth percentile, P15. (Round to the nearest hundredth.); 0.4 pts D Question 6 Let x be the normal distribution with 52.1 and ơ-75. What is the x-value representing the twelfth percentile, P12. (Round to the nearest hundredth.): 0.4 pts D Question 7 In a normal distribution with μ"14 and σ-2, find the mean of the distribution of sample means for samples of size 25.
1) Random samples of size n were selected from populations with the means and variances given...
1) Random samples of size n were selected from populations with the means and variances given here. Find the mean and standard deviation of the sampling distribution of the sample mean in each case. (Round your answers to four decimal places.) (a) n = 16, μ = 14, σ2 = 9 μ=σ= (b) n = 100, μ = 9, σ2 = 4 μ=σ= (c) n = 10, μ = 118, σ2 = 1 μ=σ= 3) A random sample of size...
1. A normal distribution has a mean of μ = 60 and a standard deviation of...
1. A normal distribution has a mean of μ = 60 and a standard deviation of σ = 12. For each of the following samples, compute the z-score for the sample mean and determine whether the sample mean is a typical, representative value or an extreme value for a sample of this size. a. M = 53 for n = 4 scores σ/ √n= 12/√4 =6 z=(53-60)/6 = -1.17 b. M = 53 for n = 9 scores σ/ √n=...
A population of values has a normal distribution with μ=121.3μ=121.3 and σ=57.2σ=57.2. You intend to draw...
A population of values has a normal distribution with
μ=121.3μ=121.3 and σ=57.2σ=57.2. You intend to draw a random sample
of size n=27n=27.
What is the mean of the distribution of sample means?
μ¯x=μx¯=
What is the standard deviation of the distribution of sample
means?
(Report answer accurate to 2 decimal places.)
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ule 7 The Central Limit Theorem Due in 6 hours, 52 A population of values has a normal distribution with y = 121.3 ando = 57.2. You intend...
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A population of values has a normal distribution with μ=39.5 and σ=37.4. You intend to draw...
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Questions 23-30: A normal population has a mean μ = 50 and a standard deviation σ = 8. That is, ?~?(50,8). Circle your final answer for each question below. 26. If samples of size 25 are drawn from the population, what is the mean of the sampling distribution of ?̅? 27. If samples of size 25 are drawn from the population, what is the standard deviation of the sampling distribution of ?̅?
A population of values has a normal distribution with μ = 134.3 and σ = 62.4 . You intend to draw a random sample of size n = 137 . What is the mean of the distribution of sample means? μ ¯ x = What is the standard deviation of the distrib
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A population of values has a normal distribution with μ=148 and σ=5.4. You intend to draw...
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#5-7
Question 5 0.4 pts What is the z-score representing the fifteenth percentile, P15. (Round to the nearest hundredth.); 0.4 pts D Question 6 Let x be the normal distribution with 52.1 and ơ-75. What is the x-value representing the twelfth percentile, P12. (Round to the nearest hundredth.): 0.4 pts D Question 7 In a normal distribution with μ"14 and σ-2, find the mean of the distribution of sample means for samples of size 25.
A population of values has a normal distribution with
μ=121.3μ=121.3 and σ=57.2σ=57.2. You intend to draw a random sample
of size n=27n=27.
What is the mean of the distribution of sample means?
μ¯x=μx¯=
What is the standard deviation of the distribution of sample
means?
(Report answer accurate to 2 decimal places.)
σ¯x=σx¯=
ule 7 The Central Limit Theorem Due in 6 hours, 52 A population of values has a normal distribution with y = 121.3 ando = 57.2. You intend...
Question 2 1 pts The distribution of cholesterol levels in teenage boys is approximately normal with mean of 170 and standard deviation 25 (Source: U.S. National Center for Health Statistics). Find the mean of the sample means when using random samples of size 25. 5 170 97.5 6.8 34 None of these
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