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Tom works the night shift at a gas station on the edge of Champaign. One night he mixed 3 stale doughnuts in with 13 fresh doughnuts. That night 6 customers bought one doughnut each, selecting them at random. What is the probability that at least 2 stale doughnuts were sold?
Think about a density curve that consists of two line segments. The first goes from the point (0, 1) to the point (0.7, 1). The second goes from (0.7, 1) to (0.9, 2) in the xy-plane. What percent of observations fall below 0.70?
Using Chi-square table finding the P-value and interpret the result
Compute the mean and standard deviation of the scores and use these for the calculations below. Show your calculations on the back of his page.
Determine the mean and standard deviation for number of actual voters in groups of 1002.
Determine what analysis would you do on each problem (i.e., one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test.
Looking at the data, the manufacturer is incorrect in its label claim. Perform hypothesis testing to prove or disprove it. Is the manufacturer correct in its label claim? Explain.
Do any of the selected samples seem to be out of the control limits? Describe.
It falls into the region of alternative is accepted greater than .95
The mean of a standard normal probability distribution.
Determine SSE, SS (Total) and the explained sum of squared variation SSR and find the estimated y intercept slope and write the regression equation.
Explain why we need to use the t distribution. What assumption do you need to make?
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