A random sample is selected from a normal population with a mean of µ = 30and a standard deviation of o = 8 . After a treatment is administered to the individuals in the sample, the sample mean is found to be M = 33 . a. If the sample consists ofn = 16 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with a = .05. b. If the sample consists of n = 64 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with a = .05. c. Comparing your answers for parts a and b, explain how the size of the sample influences the outcome of a hypothesis test.

Q: A population has a mean u = 155 and a standard deviation o =21. Find the mean and standard deviation…

A: Given : μ = 155 , σ= 21 and n= 50

Q: A given distribution has a population mean, μ, of 127 and a population standard deviation, σ, of 11.…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 127 and…

Q: For a population with u = 34, a score of X = 31 corresponds to z = -1.00. The standard deviation for…

A:

Q: A given distribution has a population mean, μ, of 144 and a population standard deviation, σ, of 6.…

A:

Q: What z-score would be associated with the value x = 124?

A: Given that Mean = 133 SD = 6 And the value is X = 124

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A:

Q: What z-score would be associated with the value x = 143?

A: Given that Mean = 137 SD = 15 And the value X = 143

Q: A given distribution has a population mean, μ, of 118 and a population standard deviation, σ, of 8.…

A: Solution: Let X be the random variable with mean µ and standard deviation is σ. Then, the Z-score…

Q: Let mu be the population mean. In a test of H0:  mu = 3 against HA:  mu not equal to 3, the sample…

A:

Q: Find a 95% confidence interval for a mean, µ, where n = 324, x̄ = 2.7, s = .91, and se = .06.

A: Given: n = 324, x̄ = 2.7, s = .91, se = .06.

Q: A population has a mean μ=90 and a standard deviation σ=22. Find the mean and standard deviation of…

A:

Q: A given distribution has a population mean, μ, of 131 and a population standard deviation, σ, of 14.…

A: Given information Mean = 131 Standard deviation = 14

Q: A given distribution has a population mean, μ, of 114 and a population standard deviation, σ, of 12.…

A:

Q: A given distribution has a population mean, μ, of 116 and a population standard deviation, σ, of 8.…

A: From the provided information,

Q: A given distribution has a population mean, μ, of 113 and a population standard deviation, σ, of 6.…

A: A given distribution has; a population mean(μ)=113 and a population standard deviation(σ)=6 find…

Q: A given distribution has a population mean, μ, of 106 and a population standard deviation, σ, of 8.…

A:

Q: A given distribution has a population mean, μ, of 125 and a population standard deviation, σ, of 14.…

A:

Q: During rush hour, the traffic speed on a busy highway is found to have mean 42 mph and standard…

A:

Q: A given distribution has a population mean, μ, of 150 and a population standard deviation, σ, of 6.…

A: Distributions are of 2 types, discrete and continuous. A normal distribution is a continuous…

Q: A given distribution has a population mean, μ, of 132 and a po

A: Given information: μ= 132   σ= 12 x=174

Q: A given distribution has a population mean, μ, of 133 and a population standard deviation, σ, of 15.…

A: A given distribution has a population mean, μ, of 133 and a population standard deviation, σ, of 15.

Q: A given distribution has a population mean, μ, of 117 and a population standard deviation, σ, of 6.…

A: Given data, Mean (μ)=117 sd(σ)=6 If x=172 z=?

Q: For a population with a standard deviation of σ = 5, what is the z-score corresponding to a score…

A: We have to find z score..

Q: A data obtained from a random sample has mean 68 and standard deviation 35. The value whose Z-score…

A:

Q: A given distribution has a population mean, μ, of 147 and a population standard deviation, σ, of 8.…

A: Given information Mean (µ) = 147 Standard Deviation(σ) = 8 X = 130 z-score

Q: A random variable Y has a normal distribution with mean µ and variance o. Given that 10% of the…

A: Given that Y~Nμ,σ2 Given that 10% of the values of Y exceed 17.24 That is,…

Q: A population of N = 6 scores has ΣX = 42. What is the population mean?

A: Given ,Population of N=6 scoresand Σx =42

Q: A given distribution has a population mean, μ, of 101 and a population standard deviation, σ, of 15.…

A: Z-score for any Raw score X is given by, Z Score=(X-mu)/sigma Where mu is mean and sigma is standard…

Q: A given distribution has a population mean, μ, of 147 and a population standard deviation, σ, of 7.…

A:

Q: If a sample of n = 4 scores is obtained from a normal population with µ = 70 and σ = 12, what is the…

A:

Q: To evaluate the effect of a treatment, a sample is obtained from a population with an estimated mean…

A:

Q: Determine if the population mean is different from 26 at the α=0.01 level of significance.   P VALUE

A: It is given that  Population mean = 26 Sample mean = 31.8 Sample standard deviation = 6.3 Sample…

Q: A given distribution has a population mean, μ, of 108 and a population standard deviation, σ, of 12.…

A:

Q: What z-score would be associated with the value x = 172?

A: Given that Mean = 112 SD = 10 And value X = 172

Q: The average American gets a haircut every 35 days. Is the average smaller for college students? The…

A: In this case, a test is conducted by an agency to see whether the average is less than 35. Here, the…

Q: A given distribution has a population mean, μ, of 100 and a population standard deviation, σ, of 9.…

A: From the provided information, Mean (µ) = 100 Standard deviation (σ) = 9 X~N (100, 9)

Q: For a population with a mean of μ = 75 and a standard deviation of σ = 7, find the z-score…

A: Population mean μ=75, standard deviations σ=7, M=84, n=6

Q: A given distribution has a population mean, μ, of 101 and a population standard deviation, σ, of 8.…

A:

Q: Consider a large population with?=67 and ?=6. Assuming ?/?≤0.05, find the mean and standard…

A: GivenMean(μ)=67standard deviation(σ)=6

Q: A given distribution has a population mean, μ, of 106 and a population standard deviation, σ, of 11.…

A: Mean = 106 Standard deviation = 11 Raw score = 104

Q: A given distribution has a population mean, μ, of 137 and a population standard deviation, σ, of 15.…

A: Given, μ=137 σ=15 x = 110 z=?

Q: A random sample is obtained from a normal population with a mean of u=95 and a standard deviation of…

A: Introduction: Denote μ as the true population mean. It is given that, the sample size is, n = 16…