A population of N = 10 scores has a mean of μ = 24 with SS = 160, a variance of σ2 = 16, and a standard deviation of σ = 4. For this population, what is Σ(X − μ)?
A. 0. B. 4. C. 16. D. 160
x, and S1 are the sample mean and sample variance from a population with mean μ| and variance ơf. Similarly, X2 and S1 are the sample mean and sample variance from a second population with mean μ and variance σ2. Assume that these two populations are independent, and the sample sizes from each population are n,and n2, respectively. (a) Show that X1-X2 is an unbiased estimator of μ1-μ2. (b) Find the standard error of X, -X. How could you estimate...
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 of N 16 scores has a mean of μ-4. One person with a score of X 4 is removed from sample, what is the value for the new mean?
If a population of N = 10 scores has a mean of 30 and a standard deviation of 5, then the population variance equals
A random sample of size n = 64 is selected from a population with mean μ = 52 and standard deviation σ = 24. a. What will be the approximate shape of the sampling distribution of x? skewed symmetric normal b. What will be the mean and standard deviation of the sampling distribution of x? mean= standard deviation=
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...
A population of scores forms a normal distribution with a mean of μ = 71 and a standard deviation of σ = 11. (a) What proportion of the scores in the population have values less than X = 69? (Round your answer to four decimal places.) (b) If samples of size n = 8 are selected from the population, what proportion of the samples will have means less than M = 69? (Round your answer to four decimal places.) (c)...
A random sample of n measurements was selected from a population with unknown mean μ and standard deviation σ = 35 for each of the situations in parts a through d. Calculate a 99% confidence interval for μ for each of these situations. a. n = 75, x = 20 Interval: ( _____, _____ ) b. n = 150, x = 104 Interval: ( _____, _____ ) c. n = 90, x = 16 Interval: ( _____, _____ ) d....
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...
D Question 24 1 pts A population of N-100 scores hasu -30 and 0-2. What is the population variance? 16 Question 25 1 pts The value for SS can never be greater than the mean positive negative Brven peanuts; it has a terrible reaction