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We can compare two sample means to determine if the samples were obtained from normal populations with the same mean using the "t" distribution. Three assumptions are required. What are they?
Find a 99% confidence interval estimate of the proportion of people who say that they voted.
Describe the optimal solution to a linear programming problem. comprise the following constraints from a two -variable linear program.
Do these results suggest that the racial makeup of the faculty members is different from that of the students? (Use the .05 significance level.) Use the five steps of hypothesis testing and explain your findings.
A confidence interval increases in width as:
Compute standard error of mean? Compute the margin of error, with 95% confidence.
A researcher plans a study in which a crucial step is offering participants a food reward. It is important that the three food rewards be equal in appeal.
Four wheel bearings have been replaced on a company car. The mechanic has selected 4 bearings from a large supply bin. The mechanic is unaware that 10 percent of the bearings fail within the first 100 miles.
Construct a 90% two-sided confidence interval onthe difference between the proportion nonconforming in processes 1 and 2. Based on this confidence interval, can you conclude at a significance level of 10% that the difference is not equal to 10%? W..
Recognize the given samples are independent samples or matched pairs.
a) Do a test to see if workers attitudes on this matter have changed using a 90% alpha. b) Explain to management what your findings are and what this suggests about future decisions vs work options.
Use the binomial distribution formula to calculate the probability that:
Can we conclude that mean time for game is less than 3.50 hours? Use.05 significance level.
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