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Find the appropriate critical statistic for : A one tailed test in the positive direction with 15 observations with alpha equal to 0.001.
Find the critical statistic for a one tailed test in the negative direction with 25 observations and alpha equal 0.01.
Find the appropriate critical statistic for a two tailed test with 20 observations and alpha equal to 0.05.
Describe a 5-step hypothesis test for two variances for a particular claim related to a real life experience. You need to state the claim, define the null and alternate hypothesis
Create a 98 percent confidence interval for the population mean.
Using P-values for hypothesis testing they are intuitively easy and dont require critical values in charts. In real world terms, what is the best way to describe how P-values work and how to explain this to someone?
How large a sample is required if the 97 percent level of confidence is used and the estimate is to be within $2,500? The standard deviation is $16,000.
What is the difference between a null hypothesis and an alternate hypothesis? Explain what is meant by the critical value of a statistical value.
Evaluate true mean delivery time to within 5 minutes at 90% reliability level? Suppose that standard deviation for delivery times is 18.2 minutes.
Compute the Relative risk (RR) of ADR with Drug A compared to Drug B. Show all calculation. Interpret the RR value. Do you arrive at the same conclusion based on the OR estimate and RR?
Explain briefly and in nontechnical language what "a significant difference (P
What sample size is needed to estimate the proportion of Americans who favor tougher gun control with 95% confidence and maximum error of 3%. Assume past studies indicted that the proportion is around 40%.
Suppose you were a manager of a business. You can only pick on method to solve the LP problems, which method would you choose and Why?
Find the best predicted temperature (in degree F) at a time when a cricket chirps 3000 times in one minute. What is wrong with this predicted value?
What type of shape would you expect the histogram of the sample size to have? What value would you estimate for the mean of the histogram of sample means?
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