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Use normal disrtibution of fish lengths for which the mean is 8 inches and the standard deviation is 5 inches. Assume the variable x is normally distributed. What percent of fish are longer than 10 inches? If 200 fish are randomly selected, about how many would you expect to be short than 7 inches?
Provided that the selected student excels in sports, determine the probability that the student is a boy?
Compare value of test statistics F obtained in part(2) with value of t 2 , square of test statistic for testing H 0 : β 1 =0 that was needed in test null hypothesis that true slope is 0. Interpret the results of this test.
Hagger Engineering Corporation is considering undertaking several proposed projects for the next fiscal year. The projects, the number of engineers and the number of support personnel necessary for each project.
The technician has just made an attempt to calibrate the machine. a. What is the probability that the machine is in adjustment?
Develop 3 regression models to forecast selling price based upon each of other factors individually. Which of these is best?
Given the large difference between the two measures of central tendency, which of the two would you rely on in describing the average claim cost and why?
The assembly time for a product is uniformly distributed between 6 to 10 minutes.
A study was recently done in which 500 people were asked to point out their choices for one of three products. Following table illustrates the breakdown of responses by gender of the respondents.
What are the null and alternative hypotheses in this situation?
Is the gender distribution for theater goers significantly different from the distribution for the general college? Test at the .05 level of significance.
You took a sample of your expenses for 20 weeks and found that the average is $285 and the standard deviation for the sample is $25. Set up your null and alternative hypothesis for testing whether your cists are different and do the analysis using..
Find the sample mean and sample standard deviation for the amount of unspent money returned at the end of the day.
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