A population has a mean μ = 72 and a standard deviation o=27. Find the mean and standard deviation of a sampling distribution of sample means with sample size n = 81. H₂ = (Simplify your answer.)
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- #5-6 Choose the letter of the correct answer.Square of the standard deviation is called Select one: O a. Coefficient of determination b. Variance c. Square Deviation d. Mean DeviationA population has a mean μ = 72 and a standard deviation a=27. Find the mean and standard deviation of a sampling distribution of sample means with sample size H n=81. IIE R (Simplify your answer.) (Simplify your answer.) a: =
- A population has a mean u= 88 and a standard deviation o = 18. Find the mean and standard deviation of a sampling distribution of sample means with sample size n= 81. %3D H=(Simplify your answer.)ssume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15 (as on the Wechsler test). Find the following: The Z-value that separates the bottom 18% from the others. The Z-Value for the 95 percentile. What is the IQ score that separates the bottom 18% from the others? The 95 percentile is? A. 113.725 B. -.92 C. 75.325 D. -.915 E. 1.645 F. 86.275 G. 124.675 H. .915A distribution of values is normal with a mean of 190 and a standard deviation of 4.Find the interval containing the middle-most 30% of scores: Enter your answer using interval notation. Example: (2.1,5.6)
- A population has a mean u = 90 and a standard deviation o = 30. Find the mean and standard deviation of a sampling distribution of sample means with sample size n= 231. H = (Simplify your answer.)The standard error of the mean is a Sample standard deviation b. Standard deviation of the population c.Standard deviation of the mean d.Standard deviation of the distribution of sample meansDetermine the number of standard deviations from the mean (z-score). In the United States, the distribution of a male's height has a mean of 69 inches with a standard deviation of 3 inches. How many standard deviations from the mean is John Doe, who is 67 inches tall? Question 15 options: 0.67 standard deviations below the mean 0.33 standard deviations below the mean 2 standard deviations below the mean 1 standard deviation below the mean
- The distribution of heights in a population of women is approximately normal. Sixteen percent of the women have heights less than 62 inches. About 97.5% of the women have heights less than 71 inches. Use the empirical rule to estimate the mean and standard deviation of the heights in this population. Mean: K inches Standard Deviation: inchesone z-score unit is equivalent to ______ of the distribution. a. the variance b. the range c. the standard deviation d. the mean e. the correlation coefficientRefer to the data set in the accompanying table. Assume that the paired sample data is a simple random sample and the differences have a distribution that is approximately normal. Use a significance level of 0.05 to test for a difference between the weights of discarded paper (in pounds) and weights of discarded plastic (in pounds). E Click the icon to view the data. In this example, Hg is the mean value of the differences d for the population of all pairs of data, where each individual difference d is defined as the weight of discarded paper minus the weight of discarded plastic for a household. What are the null and alternative hypotheses for the hypothesis test? O A. Ho: Ha = 0 H,: Ha #0 O B. Ho: Ha #0 H1: Hd =0 O C. Ho: Ha #0 O D. Ho: Ha = 0 H1: Hd 0
