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A sample of students from an introductory psychology class were polled regarding the number of hours they spent studying for the last exam. All students anonymously submitted the number of hours on a 3 by 5 card. There were 24 individuals in the one section of the course polled. The data was used to make inferences regarding the other students taking the course. Construct a 95% confidence interval estimate. Explain your findings so that your non-quantitative partner will understand them. Their data is below:
20 18 7.5 11 10 3.5 7.5 18 19 2.5 9 149 14 14.5 17 22 4.5 10.5 15 5 8.5 8 20
Sampling variability refers to the idea that different samples will include different individuals
Calculate the probability that the median of the sample or average medians is:
From the given probability distribution finite the mean and standard deviation.
Now compute the standard deviation for this distribution.
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
A class has 13 women and 18 men. If student if selected randomly, determine the probability student is a woman?
Compute lower and upper quartiles of log10-balances? Determine 95% range of the balances in $s? Express in English what the two boundaries mean.
By using the age midpoints x and the percentages of nurses, do we have a valid probability distribution? Describe.
Suppose a company owns three cars that get 20 miles per gallon, two cars that get 22 miles per gallon and one car that gets 24 miles per gallon. Would the mean miles per gallon be 22?
Sample mean varies from population mean of 10 pounds at 5 percent level of significance using two-tailed test. Compute test statistic for the sample data.
Identify Independent and Dependent variable being investigated. Formulate the hypothesis statement regarding your research issue.
The population of lengths of aluminium-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.2 inches.
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