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The following data represent the breaking strengths of samples of 20 gauge insulated copper wire from three different suppliers. The researcher is interested in finding evidence that the distribution of breaking strength differs by supplier. Use the .05 significance level and the Kruskal-Wallis test to answer the following questions.
Supplier
A
B
C
140
156
123
144
164
127
145
166
131
151
169
152
180
Which of the following correctly describes the p-value?
What is the critical value?
What is the correct decision?
Suppose that January sales for the fourth year turn out to be $295,000. What was your forecast error? If this is a large error, Karen might be puzzled about the difference between your forecast and actual sales value.
1. find the margin of error for the given values of csand nc0.95s3.1n812. construct the confidence interval to find the
assume that there are nine parking spaces next to one another in a parking lot. nine cards need to be parked by an
According to T-100 Domestic Market, the top seven airlines in the United States by domestic boardings in a recent year were Southwest Airlines with 81.1 million, Delta Airlines with 79.4 million, American Airlines with 72.6 million, United Airline..
Describe the target population, sampling frame, sampling unit, and observation unit. Discuss any possible sources of selection bias or inaccuracy of responses.
Select two non-parametric tests utilized in business decision making? Give an example of each test with an appropriate business situation.
A newspaper article discussed the opening of a Whole Foods Market in the Time=Warner building in NYC. What assumption is necessary about the population distribution in order to perform the test
1 if we are very certain that the true standard deviation of the number of defects per screen is below 2 what sample
1. thirty eight percent of young adults say they use credit cards because of the rewards program. seven young adults
If samples of size 224 were repeatedly selected from the population of children born to mothers with HIV antibody, what would be the mean number of infected children per sample?
Given that this sample is extremely large, can the responses be considered to be representative of the population of the United States? Explain.
What sample size is needed to detect the difference of 10 in a 0:05-level testing against the two sided alternative with power and can you find any statistical evidence showing that the two gray levels are significantly different
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