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Eight male and eight female college students who have credit cards were surveyed and asked their total credit card debt. The responses are given below in dollars:
Males: 1000, 2100, 900, 1200, 1300, 500, 1400, 700
Females: 1300, 500, 2000, 1800, 1300, 1000, 2600, 1400
Researchers wanted to determine if there is a difference in the mean credit card debt owed by males versus females. Using α = 0.10, is there a difference. (Show all six steps of hypothesis testing.)
Determine point estimate of population mean? By using 90% confidence, determine the margin of error?
Assume Nick doesn't know how his received he suppose that all three states of nature are equally likely to occur. If Nick uses the equally likely criterion illustrate what decision would he make.
How close is the calculated value to your experimental value?
The Duracells had an average lifetime of 18.67 hours (SD = 1.176 hours) while the Energizer batteries had an average lifetime of 16.83 hours (SD = 2.878 hours). Assuming the population standard deviations to be equal, what is the test statisitic a..
For the following hypothesis test where H 0 : m £10 vs. H a : m >10, we reject H 0 at level of significance a and conclude that the true mean is greater than 10 when the true mean is really 8.
What is the probability that none can transact business in a foreign language?
Determine probability of waiting less than 12 minutes between successive speeders. By using cumulative distribution function of X.
a random sample of 100 doctors was selected. Suppose you reject the null hypothesis. What conclusion can you draw?
Assume the least squares equation is Y' = 10 + 20X. What does the value of 20 indicate?
A manufacturer of 35-mm cameras knows that a shipment of 30 cameras sent to the large discount store contains 8 defective cameras. The manufacturer also knows that the store will choose two of the cameras at a random, test them, and accept the shi..
The hypotheses tested by the one-way ANOVA F test - Evaluate the P-value of the ANOVA F test
What sample size must you take to be 96% confident that the results will be within $.75 of the true mean cost per call?
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