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A researcher wants to determine a 95% confidence interval for the mean number of hours that UMKC students spend doing homework per week. Suppose she knows that the standard deviation for hours spent per week by all UMKC students doing homework is 7. She allows the estimate to be within 1.5 hours of the population mean.
a) What is the maximum error of estimate she allows?
b) How large a sample should the researcher select so that the estimate will be within 1.5 hours of the population mean?
Develop three regression models to predict the selling price based upon each of the other factors individually. Which of these is best?
Develop appropriate hypotheses such that rejection of H0 will support the researcher's contention.
Determine the p-value, and at 95% confidence, test the hypotheses.
The standard deviation of the differences d for the paired sample data s d = ____________
Suppose the sample variance for 30 parts turns out to be s 2 = .0005. Use α = .05 to test whether the population variance specification is being violated.
Create a 99% confidence interval estimate of population mean amount of paint included in a 1 gallon can.
Using a 5% level of significance, can we say that, generally there is important difference between satisfaction levels of mid country residents and coastal residents?
Rhode Island Red Chickens the incubation time for Rhode Island Red chicks is normally distributed to find out the number of chicks we expect that will hatch.
To find out whether the course is effective in increasing sales, the appropriate set of hypothesis for testing is:
Write a paragraph summarizing the results of the analysis and determine whether the calculated values of chi-square are statistically significant
The instructor wanted to "pass" anyone who scored above 69. What proportion of exams will have passing scores?
There is a statistical deception here. Explain what is deceptive about the bar graph.
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