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53% of the students on campus are men, 28% of the students are majoring in business, and 19% of the men on campus are majoring in business. What is the probability that if you randomly select a student on campus, this is student is male OR majoring in business?
In 2007, the IRS audited 1.77% of individual tax returns with income greater than $100,000. What is the probability that two randomly selected returns with income greater than $100,000 will be audited?
The Federal Government is stepping up efforts to reduce average response times of fire departments to fire calls. The distribution of mean response times to fire calls follows a normal distribution with a mean of 12.8 minutes and a standard deviat..
Critically discuss how someone may use measures of central tendency, variation, or position in their home, school, or workplace.
A battery manufacturer advertises the average life of its automobile battery is 60 months.what % of batteries should last between 50 and 70 months? The standard deviation is 10 months.
Rob works in quality at a well known saw blade company. An inspector on his team has uncovered an issue with the kerf dimension on the bandsaw blade line. Rob conducts a sampling study and finds that 7% of the bandsaw blades are out of spec.
Compute the mean, variance and standard deviation for the grouped data. Based on the previous answer, how much could the realtor expect to make if he sells 3 houses?
Can we conclude at the 5% significance level that the population mean weight of athletic men is lower than the population mean weight of non-athletic men?
Convert each of the following z intervals to x intervals.
It is generally believed that electrical problems affect about 14% of new cars. An automobile mechanic conducts diagnostic tests on 128 new cars on the lot. What is the standard deviation for the sample proportion?
The following data were collected as part of a study of coffee consumption among male and female undergraduate students. The following reflects cups per day consumed:
An unpooled variance t-statistic, if appropriate, would have 7 degrees of freedom. Calculate the value of an appropriate test statistic. Construct the rejection region.
you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. What is the value of your pooled proportion?
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