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You are the manager of a factory that produces Mini-Oats Cereal. The factory has an automated packaging machine that can be set at any targeted
In an experiment to determine the effect of nutrition on the attention spans of elementary school students, a group of 15 students were randomly assignment
At the 5% level do the data provide sufficient evidence to conclude that the mean time served for fraud is less than that for firearms offenses?
A study was conducted that examined the relationship between mentah-health classification and thoughts of suicide.
Two tests were given. The tests were designed with different scales. For test #1: the mean is one hundred and the standard deviation is twenty-five
A company that produces bias-ply tires is considering a certain modification in the tread design. An economic feasibility study indicates the modification
An astronomer is testing the claim that the mean brightness of a certain star is now more than 30 units. She is able to get 6 readings on the star
A check cashing service found that 5% of all checks submitted to the service were bad. (i.e. they could not be cashed for lack of funds).
Researchers designed a questionnaire to identify compulsive buyers. For a sample of consumers who identified themselves as compulsive buyers
Use traditional hypothesis test approach. Draw a graph showing the test statistic and critical values.
Test the given claim by using the traditional method of testing hypothesis.
The Ferguson Paper Company produces rolls of paper for use in adding machines, desk calculators, and cash registers.
Need a paired difference statistical analysis with a confidence level at 95% with t-value for alpha of 0.25
To determine the effect of advertising in the Yellow Pages, Bell Telephone took a sample of 40 retail stores that did not advertise in the Yellow Pages
One factor in low productivity is the amount of time wasted by workers. Wasted time includes time spent cleaning up mistakes, waiting for more material
A fast food franchiser is considering building a restaurant at a certain location. Based on financial analyses, a site is acceptable only
In an attempt to reduce the number of person-hours lost as a result of industrial accidents, a large production plant installed new safety equipment.
An experiment is set to test the hypothesis that a given coin is unbiased. The decision rule is the following:
A publisher is considering three different covers for a new magazine. A random sample of 90 people are asked to pick their favorite.
When the p-value is smaller than the significance level:
Analyse the data below to test the hypotheses that there are no differences between the two groups of subjects in terms of their walking time to exhaustion
I have heard from my teacher that there is a 7th null hypothesis hidden in the text for this study. The first 6 are presented in the tables.
Analyze my data with spearmans rank order coefficient test and came up with the table.
Scenario:Suppose we hypothesize that there is a negative (inverse) relationship between treatment and depression.
Test suggests that the average client loses 15 lbs during the first month feels the actual number of pounds loss is less than this tested the claim