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An appliance manufacturer is considering the purchase of a new machine for stamping out sheet metal parts. If μ0 (given) is the true average of the number of good parts stamped out per hour by their old machine and μ is the corresponding true unknown average for the new machine, the manufacturer wants to test the null hypothesis μ = μ0 versus a suitable alternative. What should the alternative be if he does not want to buy the new machine unless it is (a) more productive than the old one? (b) At least 20% more productive than the old one?
For this assignment, you will examine the use of qualitative data for a business scenario.
Jessica must finish two courses (much like myself), statistics and economics, in order to complete the requirements for a BA degree. All along she has maintained an 80% average.
final exams at uo are generally considered either easy 20 or hard 80. at the same time the grades are usually perceived
a light fixture contains 2 light bulbs. the lifetime xi of each bulb is exponentially distributed with a mean of 200
Please give an example on higher wages vs. education level using a sample population of 30 men and women. Compute the measures of central tendency, dispersion, and skew for your data
The probability of going to college is 0.4. What is the probability that the proportion of women who go to college is greater than 50%.
When you calculate CIs for time on task, I notice that you use the critical value from the t-distribution (TINV(0.05, degrees_of_freedom))
in a random sample of visitors to a famous tourist attraction 84 of 250 men and 156 of 250 women bought souvenirs
A medical researcher found a significant relationship among a person's age x1, cholesterol level x2, sodium level of the blood x3, and systolic blood pressure y.
Prove that there are no integers x, y, and z such that. Show that square root of 2 cubed is an irrational number.
One of the questions asked on the survey to purchasing agents is: Do you think the economy is expanding? Last month, of the 300 responses 160 answered yes to the question.
What is the minimum sample size you should use to assure that your estimate of will be within the required margin of error around the population p?
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