1. For a population with a mean of μ = 70 and a standard deviation of σ = 20, how much error would you expect between a typical sample mean (M) and the population mean for each of the following sample size?
a. n=4 scores
b. n=16 scores
1. For a population with a mean of μ = 70 and a standard deviation of...
A population forms a normal distribution with a mean of µ = 120 and a standard deviation of σ = 14. If two scores were selected from this population, how much distance would you expect, on average, between the second score and the population mean? A sample of n = 20 scores from this population has a mean of M = 90, do you think this sample is relative typical or extreme to the population? Explain. With a large standard...
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=...
99 and standard deviation σ A population whose distribution is unknown has mean μ and a sample of size 26 is drawn from this population, then 1, a. The mean oJ a b. The standard error ot c. The distribution of A population whose distribution is unknown has mean μ = 99 and standard deviation σ = 7 and a sample of size 26 is drawn from this population, then 1, a. b. c. The mean of X= The standard...
11. A distribution of exam scores has a mean of μ = 78. a.If your score is X = 70, which standard deviation would give you a better grade: σ = 4 or σ = 8? Answer: ________________ b.If your score is X = 80, which standard deviation would give you a better grade: σ = 4 or σ = 8? Answer: ___________________ 12. For each of the following, identify the exam score that should lead to the better grade....
A population has a mean μ=73 and a standard deviation σ=24. Find the mean and standard deviation of a sampling distribution of sample means with sample size n=64.
A population has a mean μ=86 and a standard deviation σ=28. Find the mean and standard deviation of a sampling distribution of sample means with sample size n=49.
A population has a mean μ=87 and a standard deviation σ=30. Find the mean and standard deviation of a sampling distribution of sample means with sample size n=249. μx= ?????
A random sample is selected from a population with mean μ = 102 and standard deviation σ = 10. Determine the mean and standard deviation of the xbar sampling distribution for each of the following sample sizes. (Round the answers to three decimal places.) (a) n = 15 μ = σ = (b) n = 35 μ = σ = (c) n = 55 μ = σ = (d) n = 110 μ = σ = (e) n = 440...
A population has a mean μ=71 and a standard deviation σ=27. Find the mean and standard deviation of a sampling distribution of sample means with sample size n=81. μx=_____ (Simplify your answer.)
A population has a mean μ=0.1 and a standard deviation σ=0.2. What is the standard deviation of the sampling distribution of the sample means if the sample size is n=112? Round your answer to the nearest hundredth.