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In a sample of 55 business trips taken by employees in the HR department, a company findsthat the average amount spent for the trips was $1,413 with a standard deviation of $443. Ina sample of 81 trips taken by the employees in the sales department is $1,617 with astandard deviation of $534. When testing the hypothesis (at the 5% level of significance) that the average amount spent on trips taken by the sales department are higher than thosetaken by the HR department what is the test statistic? (please round your answer to 2decimal places)
In a group of college students there are 200 women, 10 of whom smoke. There are 150 men, 32 of whom smoke. Calculate the probability a randomly selected student is a woman or a smoker.
a presidential candidate plans to begin her campaign by visiting the capitals in 4 of 47 states. what is the
An average computer mouse inspector can inspect 60 mice per hour with a population standardx deviation of 10 mice per hour. The 48 computer mice inspectors at a particular factory can only inspect 55 mice per hour. Does the company have reaseon to..
How do we calculate the upper and lower limits of one sided and two sided 95% confidence level of difference in proportion when comparing two groups in clinical research.Could You kindly help with some formula for calculating these.
Medical researchers interested in determining the relative effectiveness of two different drug treatments on people with a chronic mental illness established two independent test groups.
A random sample of 150 voters yields 87 who support her. The candidate wishes to test her claim at the 0.05 level of significance. Compute the value of test statistic.
Students will meet the required "oral" component of the presentation by posting a PowerPoint presentation including the following criteria:
Gather three of your favorite packaged foods; perhaps one from each: breakfast, lunch and dinner. Use the model explained in the "Are You Sure It's Fat Free?" to analyze, through the mathematical formula explained the fat content and protein conte..
the heights of 18-year-old men are normally distributed with a mean of 68 inches and a standard deviation of 3 inches.
forty percent of the homes constructed in the quail creek area include a security system. three homes are selected at
(a) Find the range. (b) Find the variance. (Give your answer correct to two decimal places.) (c) Find the standard deviation. (Give your answer correct to two decimal places.)
What is the distinction between a one-sided and a two-sided hypothesis test in this problem?
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