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Pets
The American Veterinary Association claims that the annual cost of medical care for dogs averages $100, with a standard deviation of $30, and for cats averages $120, with a standard deviation of $35.
a) What's the expected difference in the cost of medical care for dogs and cats?
b) What's the standard deviation of that difference?
c) If the difference in costs can be described by a Normal model, what's the probability that medical expenses are higher for someone s dog than for her cat?
What are the null and alternative hypotheses for this test?- For each sample, construct the 95% confidence interval for the population mean.
A researcher reports a mean pulse rate of 80 for the ampled patients. the data also revealed a standard deviation of 10.5. what percent of patients pulse rates will fall between 69.5 ans 90.5?
Can you envision circumstances under which these outcomes would not be normally distributed? Provide three distinct examples of the business outcomes that are not normally distributed.
What are the null and alternative hypotheses for this test?- Use ANOVA and the 0.05 level of significance in testing the null hypothesis identified in part (a).
If θ1 and θ2 are unbiased estimators of θ, show that θ3=k1θ1+ k2θ2 is biased estimator of θ. What condition must be imposed on constants k1 and k2, so that θ3 is an unbiased estimator of θ?
Formulate null and alternative hypothesis to test for no difference between the population mean credit card charges for groceries and the population mean card charges for dining out.
If 8 kids within this age group who use the Internet are randomly chosen, what is the probability that 2 of them do their schoolwork on line? What is the probability that no more than 5 of them do their schoolwork on line?
Explain the distribution of mean of samples of size 15.
Suppose that (X1, Y1, Z1) = (7.0, 2.5, 1.9),(X2, Y2, Z2) = (6.3, 9.6, 4.1), (X3, Y3, Z3) = (6.9, 3.7, 12.4), (X4, Y4, Z4) = (3.6, 12.1, 6.5), (X5, Y5, Z5) = (9.0, 6.4, 11.2), (X6, Y6, Z6) = (3.0, 6.2, 7.7), and (X7, Y7, Z7) = (4.2, 0.4, 8.2) represe..
explain the difference between a left-tailed two-tailed and right-tailed test to include when would we choose each type
Construct the 95% confidence interval for the proportion of students with at least one injury.
Rousillon Inc. sells identical set of macaroons in three different packaging at the same price. Find the mean output for each packaging and the grand mean for all the months and for all the three packaging's. Find the value of SSA, SSE, and SST
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