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Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below.
The firm examined 45 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation, s = 4.45 pages. Is the true mean greater than 10 at a 99% confidence level?
A. Choose the Hypothesis
B. Specify the Decision Rule
C. Calculate the Test Statistic
D. Make the Decision
E. Give an interpretation of the Decision
F. P-value Method
1. Calculate the P-value. What is it?
2. Does that P-value support the Decision in Part D
If die is loaded so that 6 comes up with probability 0.2 and probabilities of 2,3,4, and 5 faces are not affected, determine the assignment of probabilities to the six faces?
Once production is set up, 80 units can be produced per day. Daily demand rate for the units is 60 per day. a. What is the most economical number to produce per production run? b. How long is each production cycle?
A survey of 10 different suburbs in Dallas Texas found the average gasoline to be $ 1.294 a gallon with a standard deviation of $ .0526. What is the critical value using a=.05 and what is the test value.
Draw a column chart from grade book. Use column illustrating students' names; select one of the tests to plot.
Make a decision regarding the null hypothesis based on the sample information. Interpret the results of the test and state your conclusion.
To find the probabilities values of standard normal variable
You are considering adding a new food product to your store for resale. Explain how many units of the new product should be purchased for resale.
A quality control engineer selects a part to be tested. The part is then declared acceptable, repairable, or scrapped. Then another part is tested. List all the possible outcomed of this experiment.
The weights of the contents of cereal boxes are normally distributed, with a mean weight of 12 ounces and a standard deviation of 0.05 ounce. The weights of four cereal boxes selected at random are 12.01 ounces, 11.92 ounces, 12.12 ounces, and 11...
The level of significance indicates the probability of rejecting a false null hypothesis.
The standard deviation of test scores on a certain achievement test is 11.4. A random sample of 100 scores on this test had a mean of 71.2. Based on this sample, find a 90% confidence interval for the true mean of all scores. Complete the below:
The best estimator or appreciative for the population proportion is 0.45. How large must the sample be?
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