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The random variable X takes on the values 5, 20, 30, and 200 with probabilites 0.60, 0.30, 0.08, and 0.02 respectively.
Use the statistical capacity of your calculator to find the expected value of Xrounded to one place of decimal. The same data will be used in question 4, so don't clear your calculator just yet.
Using the same data as in Question 3, find the VARIANCE of the random variable X rounded to two places of decimal.
Firm wishes to choose a small sample of driving distances from the past year and carry out a hypothesis test for its suspicion. State the null hypothesis and the alternative hypothesis that it would use for this test.
Suppose the first chip is replaced, a second chip is drawn, and the number Y on the chip noted. Compute P(Y= y) for every real number y.
Is this a one-tailed or a two-tailed test? Explain.- Carry out the hypothesis test at the 0.05 level of significance.- State your conclusion.- What is the p-value? Explain its relevance.
in a study it was found that the average age of cable tv shoppers was 48 years. suppose you want to test the null
a multiple-choice test consists of 77 questions with possible answers of a b c d e. estimate the probability that with
A digital camcorder repair service has set a goal not to exceed an average of 5 working days from the time the unit is brought in to the time repairs are completed. A random sample of 12 repair records showed the following repair (in days)
The table below shows the percent of the labor force that is unemployed and the size of the labor force for three counties in Northwest Ohio. What would be an appropriate unemployment rate to show for the entire region?
Fleishmann, Inc. just paid a $2 annual dividend (D0) on its common stock. The dividend is expected to increase at 8% per year indefinitely.
Calculate and interpret the appropriate statistical test to determine the relationship between the following two variables. Use the five-step model of hypothesis testing to draw conclusions at the .05 level of significance
What is your null hypothesis? What is your alternative hypothesis? What your decision about the null hypothesis?
If the answer is yes, what lessons might modern society learn from this ideological movement?
Distinguish between a randomized block design and a Latin square design. What are the advantages and disadvantages of a Latin square design?
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