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A student believes that no more than 20% (i.e., 20%) of the students who finish a statistics course get an A. A random sample of 100 students was taken. Twenty-four percent of the students in the sample received A's.
a. State the null and alternative hypotheses.
b. Using the critical value approach, test the hypotheses at the 1% level of significance.
c. Using the p-value approach, test the hypotheses at the 1% level of significance.
Following sample data shows the weekly closing price of ABC stock. Compute the sample mean and variance from this data set.
Find the critical value for t and determine the null and alternate hypothesis.
What is the probability that separates the bottom 25 percent from the rest of the distribution.
At the 5 percent level of significance, can we conclude that the mean weight is greater than 16 ounces? Determine the p-value.
Public transportation and the automobile are 2 methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
Test the whether the attitude toward keeping weight down associated with smoking status.
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
The profit for product 1 is $6 per unit, and the profit for product 2 is $4 per unit. Solve this model by using graphical analysis.
The number of passengers on the Carnival Sensation during one-week cruises in the Caribbean follows the normal distribution.
Determine 80% confidence interval for average weights of Allen's hummingbirds in study regions. Determine the margin of error?
Now he wants to know if there is a difference between the three formats. Is there?
Florida State University administers a test of mathematics placement to students when they first enter the university.
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