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You select a sample of 64 measurements from a normally distributed population. Suppose that your sample mean is 1175 and that your sample standard deviation is 100. Using α=0.05, what is the appropriate conclusion you should draw from your sample?
Is there a significant difference in sales dollars of hats between the west side and east side stores at the 5 percent level of significance? (a) State the hypotheses. (b) State the decision rule and sketch it. (c) Find the test statistic and stat..
A company is interested in estimating μ, mean number of days of sick leave taken by its employees. The firm's statistician randomly selects 100 personnel files and notes the number of sick days taken by each employee.
The following regression equation and correlation coefficient were calculated using minitab for the bivariate data age of men and their weight.
Is there solid evidence that the earth is getting warming? 69% of 731 male resondents answered yes and 70% of 770 female respondents answered yes.
He can award a bonus to 20 percent of the representatives. What is the cutoff point between those who earn a bonus and those who do not?
Assuming that any newspaper left over has no value and that running short has no effect on any customer's tendency to return, determine the losses due to understockting and overstockting.
Find the probability that the first card is a two and the second card is a ten. Round your answer to three decimal places.
Assume that standard deviation is $3,204 and that 36 four-year institutions are arbitarily selected. Determine the probability that sample mean cost for these 36 schools is less than $25,000.
Among Americans who are auto racing fans, 59% identify NASCAR as their favorite type of racing. What is the probability that all four have NASCAR as their favorite?
A southern state has an unemployment rate of 6%. The state conducts monthly surveys in order to track the unemployment rate. In a recent month, a random sample of 700 people showed that 35 were unemployed.
Mean of $62000 per year and a standard deviation of $5000 per year. what percent of police officers make: what salary represents the top 5%?
Provide an explanation of a chi-square test. Why would you use the chi-square statistic? What type of data is used with chi square analysis?
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