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Question 1: The level of significance indicates the probability of rejecting a false null hypothesis.
Question 2: As the level of significance a increases, we are more likely to reject the null hypothesis.
Question 3: The further the hypothesized mean is from the actual mean the greater the power of the test.
Using the EMV criteria (you wish to maximize expected profits in this case) determine what course of action that Optel should take. Make sure to state the best strategy in words.
At the 5 percent level of significance, can we conclude that the mean weight is greater than 16 ounces? Determine the p- value.
Find the mean and standard deviation of X, the number of students in class, who will develop influenza.
Based on the scatter diagram, does there appear to be any relationship between the number of assemblers and production? Explain.
Draw a normal probability plot for residuals using excel or Minitab. Do the residuals seem normally distributed? If yes, why?
Conduct a hypothesis test using H 0 : σ 2 = .009216 to see whether the sample data indicate that the variability in interest rates changed.
Determine the calculated value of the test statistic? What distribution does test statistic have when null hypothesis is true?
P-value to test hypotheses,
The researchers planned to use simple linear regression to see if the age at which a baby was first able to crawl could be predicted from the average outdoor temperature six months after each baby's birthdate.
Discuss whether the percent distribution of the cross-tab and chi-square supports/does not support the researcher's hypothesis.
Develop appropriate hypotheses such that rejection of H0 will support the researcher's contention.
In 1,000 samples, assuming that H 0 is true, how many times would you expect to commit Type I error if:
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