In a right-tailed test with known population standard deviation, the sample size was 8. At α = 0.05, the critical value would be     1.960     1.645     1.734     1.895

Q: A random sample of n=4 scores is selected from a population with mu=80 and standard deviation=20. On…

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Q: Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.47 and a…

A: Empirical rule: The probability that the observation under the normal curve lies within 1 standard…

Q: a normal distribution has a mean of 60 with a standard deviation of 8. for this population, which is…

A: Solution

Q: If the population standard deviation of a normal distribution is 2.8, then find the standard…

A: Answer: From the given data, Population standard deviation = 2.8 number of observations = 68

Q: A random sample of n = 4 scores is obtained from a normal population with ? = 20 and ? = 4. What is…

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Q: A random sample of 120 students has a test score average deviation of 11.4 find the margin of error…

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Q: For a sample of 35 items from a population for which the standard deviation is 5 20.5, the sample…

A: Given data is appropriate for z-test for single mean . because it is a large sample test (n>30).…

Q: Consider normally distributed population of scores with a mean μ = 100 and a standard deviation σx =…

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Q: A variable is normally distributed with a hypothesized population mean of 53 and a standard…

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Q: For a population with a mean of 75 and a standard deviation of 12, what proportion of sample means…

A: Given, Mean μ = 75 Standard deviation σ = 12 sample size n = 16

Q: For a population with mean 90 and standard deviation 10, what is the z-score corresponding to X =…

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Q: On a recent quiz, the class mean was 76 with a stanbard deviation of 3.1. Calculate the z score (to…

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Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5 find P(X…

A: Given dataMean = 35Standard deviation = 7.5

Q: sample of n=5 scores has M-20 and s2 =4. What is the sample standard deviation?

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Q: A population has a mean μ=169 and a standard deviation σ=21. Find the mean and standard deviation…

A: Mean()=169standard deviation()=21sample size(n)=46

Q: A random sample of size 25 from a normal population has mean 47.5 and standard deviation 8.4. Does…

A: In order to test the claim that the mean of the population is 42.1, conduct a single mean comparison…

Q: Let the observed value of the mean of a random sample of size n=20 from a normal distribution with…

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

A: Sample size, n = 4 Mean = 70 Standard deviation = 12 Sample mean = 69 (Raw score)

Q: If a normal has a mean of 33.7 and a standard deviation of 10.5, what is the value of the random…

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Q: Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.47 and a…

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Q: What are the mean and the standard deviation for the sampling distribution of the sample proportion?

A: Given that, Sample size (n) = 100 Population proportion (p) = 0.60 q = 1-p = 1-0.60 = 0.40 To find…

Q: Assume the random variable X is normally distributed with a mean of 50 and a standard deviation of…

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Q: Suppose that IQ scores have a bell-shaped distribution with a mean of 103103 and a standard…

A: Solution: Let X be the IQ score. From the given information, X follows normal distribution with mean…

Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5 find P(X <…

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Q: If the standard error of the mean is σx̅ = 3 and the sample size is n = 64, then the population…

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Q: At one college, GPA's are normally distributed with a mean of 3 and a standard deviation of 0.6.…

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Q: For a particular process that is in good statistical control, the mean standard deviation value,…

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Q: Suppose you take a sample of size 60 from a Normal distribution with  population mean (mu) 412 and…

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Q: A population has a mean μ=79 and a standard deviation σ=21. Find the mean and standard deviation…

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