A random sample of n 25 is taken from a normally distributed population with a mean u= 80 and standard deviation o = 5. If X = 78 and s 3.6, is there a significant difference between the means? Use a = 0.05. 2.

Q: We wish to test Ho: u = 50 versus H: u # 50. A random sample of 38 observations yields a mean of 56…

A: Given,sample size(n)=38sample mean(x¯)=56sample standard deviation(s)=21H0:μ=50Ha:μ≠50

Q: A simple random sample of size n=25 is drawn from a population that is normally distributed. The…

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Q: A simple random sample of size n=16 is drawn from a population that is normally distributed. The…

A: Given information : Sample size = n = 16 Sample mean = x = 66 Sample standard deviation = s = 19…

Q: A population has a mean of μ=30 and a standard deviation of σ=8.If the population distribution is…

A: Obtain the standard z-score for the random variable M equals 34 The standard z-score for the random…

Q: A random sample of n = 30 is taken from a normally distributed population with a mean of u = 80 and…

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Q: To evaluate the effect of a treatment, a sample is obtained from a population with a mean of 30, and…

A: A) Use one-sample t-test for the population mean: Since p-value (0.1035) is greater than 0.05, it…

Q: A sample of n=D25 scores has M=20 and s2 =9. What is the sample standard deviation?

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Q: A random sample of n = 25 individuals is selected from a population with μ = 20, and a treatment is…

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Q: A sample of n=25 individuals is randomly selected from a population with a mean of u=65, and a…

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Q: A normal distribution has a mean of u=54 and a standard deviation of o=6, what is the probability of…

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Q: A sample of n = 49 scores with M = 43 is selected from a population with µ = 40 with σ = 21. What is…

A: Mean = 40 Standard deviation = 21 Sample size = 49 Sample mean = 43

Q: A random sample of n = 16 scores is obtained from a normal population with a mean of u = 100 and a…

A: Let us consider the random sample denoted by X which follows a normal population with a mean 100 and…

Q: A random sample of 100 customers were observed to find out if the waiting time for customers in…

A: Given data : sample size, n =100 sample mean, x̄ = 202 sample standard…

Q: A sample of n=25 scores has a mean of 68. Find the z-score for this sample. If it was obtained from…

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Q: A sample of n=20 scores has a mean of M=107. Find the z-score for this sample if it was obtained…

A: Given A sample of n=20 X mean =107 a mean of μ=109  standard deviation of σ=5.

Q: A sample of n=25 individuals is randomly selected from a population with a mean of u=65, and a…

A:

Q: Suppose random samples of n = 47 are collected from an unknown distribution with the properties u =…

A: Givenn=47μ=50σ=4∑x~N(n*μ , n*σ)

Q: A treatment is administered to a sample of n=9 selected from a population with a population =80 and…

A: The sample size n is 9.

Q: A random sample is obtained from a population with a mean of μ = 45. After a treatment is…

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Q: A sample of n = 25 individuals is randomly selected from a population with a mean of µ = 65, and a…

A:

Q: )A random sample of 200 observations from a normal population whose standard deviation is 100…

A: Givensample size(n)=200sample mean (x)=150standard deviation (σ)=100α=0.05

Q: Jumbo shrimp are those that require 10 to 15 shrimp to make a pound. Suppose that the number of…

A:

Q: If a random sample of size n=160 has x¯=105 and s=9.5, find the standard error of the statistic.…

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Q: Suppose the time that it takes a certain large bank to approve a home loan is Normally distributed,…

A: The variable is the time that it takes a certain large bank to approve a home loan. The variable is…

Q: Q5. Consider a population with a known variance, and we are interested in estimating the 95%Cl using…

A: We need to use Formula of margin of error to find population standard deviation. Since population…

Q: The sample mean and standard deviation from a random sample of 29 observations from a normal…

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Q: Let X be a random variable with mean 4 and standard deviation o. What is E[X2]?

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Q: A random sample of n 16 individuals is selected from a population with μ 70, and a treatment is…

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Q: A random sample is selected from a normal population with a mean of m = 40 and a standard deviation…

A: a.   Consider that μ defines the population mean.   Null hypothesis:   H0: μ = 40.   Alternative…

Q: A random sample of size 36 is taken from a population with mean u= 17 and standard deviation o= 6.…

A:

Q: A sample is selected from a population with u = 50. After a treatment is administered to the 16…

A: It is given that Sample size n = 16 Sample mean M = 55 Sample Sd s = 8 Population mean = 50

Q: A random sample of 100,000 credit sales in a department store showed an average sale of $81.25. From…

A: Solution: From the given information, n=100,000 and σ=$10.

Q: A random sample of n = 16 scores is obtained from a  population with a mean of μ = 45. After a…

A: a.It is given that, n= 16 and µ = 45. Also, M= 49.2.The sample standard deviation is s = 8.Since σ…

Q: The average weight of insects for a laboratory experiment is 13.2 g with a standard deviation of 0.8…

A: Given: Mean=13.2g Standard Deviation=0.8g

Q: A sample is selected from a population with A = 150. After a treatment is administered to the…

A: Find null hypothesis

Q: A population of N = 10 scores has a mean of u = 24 with SS = 160, a variance of o?= 16 and a…

A: From the provided information, Population size (N) = 10 Mean (µ) = 24 SS = 160 Variance (σ2) = 16

Q: In a sample of n = 15 selected from an underlying normal distribution, we obtain standard deviation…

A: From the provided information, The sample standard deviation (s) = 10 Sample size (n) = 15

Q: A sample of n = 16 scores is selected from a normal population with σ = 32. If the sample mean of M…

A:

Q: X is a normally distributed random variable with a mean of 5 and a standard deviation of 2. For…

A:

Q: The average weight of insects for a laboratory experiment is 13.2 g with a standard deviation of 0.8…

A: It is given that μ=13.2 and σ=0.8 The insect weighs at most 14 gram is given by:…

Q: A sample of n = 20 scores has a mean of M = 45 and a standard deviation of s = 6.  In this sample,…

A:

Q: By definition jumbo shrimp are those that require Between 10 and 15 shrimp To make a pound. Suppose…

A: Given: The average number of jumbo shrimp In a 1-pound bag is μ=12.5. The standard deviation is…

Q: A random sample is selected from a normal population with a mean of µ = 30and a standard deviation…

A:

Q: A random sample of n = 25 scores is selected from a normal population with a mean of μ = 40. After a…

A: Solution: Given information n=25 Sample size μ=40 Population meanσ=5 Population standard…

Q: Jumbo shrimp are those that require 10 to 15 shrimp to make a pound. Suppose that the number of…

A: From the information, the number of jumbo shrimp in a 1-pound bag averages m = 12.5 witha standard…

Q: In a sample with M = 60 and s = 10 a score of X = 70 corresponds to a z-score of z = +1.00 because…

A:

Q: Q5. A random sample of size n = 10 from a normal population has mean = 5.68 and a standard deviation…

A: Here, α=0.05, n=10, and s=0.29.

Q: A sample of n = 16 scores is selected from a normal population with σ = 32. If the sample mean of M…

A: Given that, Sample size = 16 Standard deviation = 32 Sample mean = 81 Z score = -1.75