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Q1) Assume average puppy weighs 10 pounds. Sample of 10 puppies yields sample mean of 13.2 pounds and sample standard deviation of 2.78 pounds. Suppose population standard deviation is known to be 5.25. You wish to test whether sample mean varies from population mean of 10 pounds at 5 percent level of significance using two-tailed test. State the critical value.
Q2) For patients over age 80, probability is 0.05 that coronary bypass patient will die soon after surgery, if hospital performs eight such operations, determine the probability of two or more fatalities?
Explain how many cars would required to go by the speed trap to be 99.8% sure which at least one driver will warm oncoming traffic of the speed trap.
Is there sufficient evidence to support the claim that site has an effect on the amount of pesticide?
Find the confidence interval for the mean price, μ, of all dealer sticker prices of new cars: for a confidence level of 90% in thousands of dollars:
Does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket?
Correlation rule states that if X and Y are correlated, X has caused Y.
What are the two ways of testing a correlation coefficient for significance?
Determine the probability that at most 4 fish will be killed?
At the 5 percent level of significance, can we conclude that the mean weight is greater than 16 ounces? Determine the p- value.
At 5% level of significance, does this sample prove violation of guideline that average patient must pay no more than $250 out-of-pocket? Write your hypotheses and decision rule.
P-value to test hypotheses,
Make a point estimate of the population mean difference in endurance after taking the herbs. Make a 95% confidence interval estimate of the population mean difference.
For a binomial probability experiment, with n=150 and p=.2, it is appropriate to use the normal approximation to the binomial distribution.
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