Estimate the proportion of defective washing machines
A manufacturer wishes to estimate the proportion of washing machines leaving the factory that is defective. How large a sample should she check in order to be 90% confident that the true proportion is estimated to within 1.5%?
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Household with no children that is equal to the value obtained by the census. Give the z statistic (rounded to two decimal places) and the P-value. What do you conclude?
The manager of a crew that installs tiling has tracked the crew's output over the past several weeks, obtaining the figures below. Compute the labor productivity for each of the weeks. On the basis of your calculations, what can you conclude about
Individual truck drivers are either male or female. In the US 5% of all truck drivers are women, 95% are men. Suppose 20 US truck drivers are randomly selected to be interviewed about their pay.
Gem Infosys, a small software company, has decided to better secure its computer systems after a malware attack shut down its network operations for 2 full days.
Compute the labor productivity for each of the weeks. On the basis of your calculations, what can you conclude about crew size and productivity?
The correlation between his test and the BDI was r =.14. Evaluate this correlation. What does this correlation tell us about the relationship between these two instruments?
What is the probability that the sample mean price falls within a nickel of the State's overall mean price? i.e between 3.09 and 3.19
Write a program to read student data from the standard input, sort it by last name / first name, and print out the result to standard output. The student data consists of a last name, first name, and a gpa (floating point). You may assume no more tha
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