5. Why is it necessary to assume that the data are distributed normally when calculating a...

5. Why is it necessary to assume that the data are distributed normally when calculating a z score?

6. Why do descriptive statistics differ for variables with different levels of measurement?

7. A researcher collects data on the ages of individuals in two separate samples of equal size and concludes that one sample’s distribution is extremely platykurtic and the other sample’s distribution is extremely leptokurtic. What conclusion (if any) can the researcher make about comparisons of the frequency of cases in the modal categories in the two samples? Why?

8. If the z score corresponding to the length of one inmate’s prison sentence is 1.8 and the z score corresponding to the length of another inmate’s prison sentence is 2.5, what could you say about the severity of the first inmate’s sentence relative to the second inmate’s sentence?

9. What is obtained when we calculate a confidence interval?

Expert Solution

orchestra answered 1 year ago

Assume that X is normally distributed with a mean of 5 and a standard deviation of...

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5 Assume that the heights of U.S. residents are normally distributed with mean 65 inches and...

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2. Assume that the paired data came from a population that is normally distributed. Using a...

2. Assume that the paired data came from a population that is normally distributed. Using a 0.05 significance level and dˉ,Sd find d overbar, s Subscript d, the t test statistic, and the critical values to test the claim that µd=0. x y 11 15 9 9 17 15 3 6 16 14 15 10 14 11 16 15 d ˉ=____ (Round to three decimal places as needed.) Sd=___ (Round to three decimal places as needed.) T= (Round to three...

3. Consider the following sample data and hypotheses. Assume that the populations are normally distributed with...

3. Consider the following sample data and hypotheses. Assume that the populations are normally distributed with unequal variances. Sample Mean1 = 262 Sample Variance1 = 23 n1 = 10 Sample Mean2 = 249 Sample Variance2 = 35 n2 = 10 a. Construct the 90% Confidence Interval for the difference of the two means. H0: μ1 – μ2 ≤ 0 HA: μ1 – μ2 > 0 b. Using the hypotheses listed above, conduct the following hypothesis test steps. Following the “Roadmap for...

Data sets for the question below Data Set G: Assume the population values are normally distributed....

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5. The average age of Chief police is 56 years. Assume the variable is normally distributed....

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Data set : Data Set G: Assume the population values are normally distributed. Random variable: x...

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(a) Assume a population’s quantitative data values are normally distributed with mean µ and standard deviation...

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HW9#8 Assume that the paired data came from a population that is normally distributed. Using a...

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When data are normally distributed, the mean, median, and mode: all have the same value are...

When data are normally distributed, the mean, median, and mode: all have the same value are useful for examining the spread of scores should never be used together vary randomly

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