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The average gasoline price of one of the major oil companies has been $1.25 per gallon. Recently, the company has undertaken several efficiency measures in order to reduce prices. Management is interested in determining whether their efficiency measures have actually reduced prices. Answer the following questions for a hypothesis test that could be used to test the claim of management.
a. Develop the appropriate null and alternative hypotheses.b. What is the Type I error in this situation?c. What is the Type II error in this situation?
Rrequired service under the warranty. consider a new dealer. what is the probablity that the first claim under this warranty is the tenth car sold?
A manufacturer of automobile transmissions uses three different processes. The management ordered a study of the production costs to see if there is a difference among the three processes. A summary of the findings is shown below.
How would you approach identifying the two correct time series in #1 to the proceed to merge them into one and make a weekly estimate of attendance?
Faced with rising fax costs, a firm issued a guideline that transmissions of ten pages or more should be sent by two-day mail instead. Exceptions are allowed, but they want the average to be ten or below. Use Excel to find the right-tail p value
If a male passenger is randomly selected, find the probability that he can fit through the doorway withouth bending.
A researcher uses hypothesis test to estimate H0 µ= 80. Which combination of factors is most probable to result in rejecting null hypothesis?
The events A and B are independent, mutually exclusive or both. If two events A and B are mutually exclusive (A B = ), then they cannot be independent if P(A) > 0 and P(B) > 0. Why?
Compute lower and upper quartiles of log10-balances? Determine 95% range of the balances in $s? Express in English what the two boundaries mean.
Test the significant difference between Chi-square for attributes
Find the probability that the number who considers themselves baseball fans is (a) exactly eight (b)at least eight and (c) less than eight. If possible use technology to find the probabilities.
Do these data suggest a statistically significance difference between the proportions of drug-resistant cases in the two states? Use a 0.02 level of significance and computed value of 2.37.
In testing a new drug, researchers found that 20% of all patients using it will have a mild side effect. A random sample of 15 patients using the drug is selected. Find the probability that:
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