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The production manager at Bellevue Steel, a manufacturer of wheelchairs, wants to perform a second analysis of the number of defective wheelchairs
Identify the null and alternative hypothesis, test statistic, P-value,critical values and state the final conclusion that addreses the original claim:
Families of size 4 spent a population mean of $360 on a visit to an amusement park, standard deviation of $50 in October 2000.
For each of the following , indicate whether the factor influences the numerator or denominator of the z score
In a recent year, some professional baseball players complained that umpires were calling more strikes than the average rate of 61% called the previous year
The following data represents the running time of films produced by 2 motion picture companies. Assume these are independent samples
Determine the minimum required sample size if you want to be 95% confident that the sample mean is within 3 units of the population mean
Based on what we know about statistics and using your example, how do you believe statistics can enrich and represent the results of a study?
Consider the file data on Taxes that is included in worksheet P2 on the exam template. This data represents property taxes paid by 170 residents
A random sample of 35 days taken at a large hospital shows that an average of 44 patients was treated in the emergency room per day.
Analyze the test data (for the assays given above A, B, C, C, D, E) at the 1, 5, 9 month time points.
Ford Motor Company wishes to estimate the mean dollar amount of damage done to a new model Taurus as a result of a 10 mph crash into the rear bumper
Assume that a simple random sample is selected from a normally distributed population. Use either the P-value method or the traditional method of testing
A researcher theorized that people can hear better when they have just eaten a large meal. 6 individuals were randomly assigned to eat either a large meal
The owner of a fish market has an assistant who has determined that the weights of catfish are normally distributed, with mean of 3.2 pounds
Eight samples of a certain grape juice product were taken. The measured sugar (g) in these samples was recorded as:
Eagle Outfitters is a chain of stores specializing in outdoor apparel and camping gear. They are considering a promotion that involves mailing discount coupons
Hypothesis Testing using only P value format. Do not copy and paste all the results from the hypothesis test, you are the expert, only include critical metrics
According to news reports, Las Vegas betting parlors increased the number of proposition (prop) bets available to gamblers for this year's
Produce trucks arrive at the weigh station at the California border at a rate of 3 per hour according to a Poisson distribution
A computer manufacturer is about to unveil a new, faster personal computer. The new machine clearly is faster
For the following claim find the null and alternative hypothesis, test statistic, P=value, critical value, and draw a conclusion
Insurance adjusters are concerned about he high estimates they are receiving from Jocko's Garage.
You have a sample size of 120 and the population standard deviation of 20. You are testing the null hypothesis of whether the population mean is 120 or not.
Do you enjoy driving your car? The Pew Research Center recently polled n = 1048 U. S. drivers and found that 69% enjoyed driving their automobiles.