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Given the following N's (where N is the number of pairs of observations) and obtained r's, indicate whether the result is significant at the .05 level:
Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the afternoon shift than on the day
Comparing the accuracy and reproducibility of 3 different force gauges with varied angles and applied pressures. All of the gauges have a 50 lb. capacity
Develop a 90% confidence interval and a 95% confidence interval for the population mean. Did you use a z statistic or t statistics? Why?
What is the relationship between correlation and association?
For each of the following, (a) indicate what two populations are being compared, (b) state the research hypothesis, (c) state the null hypothesis
Are there other methods besides ANOVA that can be used to evaluate whether the difference in means between TWO OR MORE samples is significant?
Using AIU's large data base of survey responses from unit 2 Individual project (keep in mind this data base is your sample), you will begin testing hypothesis
Ms Lisa is the budget director for the New Process Company. She would like to compare the daily travel expenses for the sales staff and the audit staff.
Scenario: Your company must make a decision about a very large investment. An internal study shows that if demand for your product increases substantially
The recent boom in sales of travel books has led to the marketing of other travel related guides, such as video travel guides and audio walking tour tapes.
A statistics professor teaches 2 statistics classes. One class is taught during the day and the other class is taught in the evening.
Using a hypothesis test with a well known 4 step procedure, state your conclusion for the 0.05 significance level:
Without computing a P-value, determine whether the alternative hypothesis is supported. The alternative hypothesis, a sample mean, a sample standard deviation
Alcohol appears to be involved in a variety of birth defects, including low birth weight and retarded growth
Your car gets 29 miles per gallon, one day you see your mileage average is 28 miles per gallon. Is this change statistically significantly
We want to develop a model to predict the selling price of a home based upon the assessed value. A sample of 30 recently sold single-family houses is selected
Inc. Technology reported the results of an Equifax/Harris Consumer Privacy Survey in which 328 Internet users indicated their level of agreement
Excess postexercise oxygen consumption (EPOC) describes the energy expended during the body's recovery period immediately following aerobic exercise
A consumer protection group is concerned that a ketchup manufacturer is filling its 20-ounce family-size containers with less than 20 ounces of ketchup.
A Company produces candy on a production line. When operating properly, the production process will produce an average of u=140 pounds of candy per hour
A sample of 500 shoppers was selected in a large metropolitan area to determine various information concerning consumer behavior.
Car dealership chain owner wants to increase the car sales of his chain. He wants to determine which factors influence the sales performance.
The owner of a car dealership wants to determine whether there is a relation between the income level and the type of vehicle purchased in their dealership
A researcher interested in the senses of taste and smell has carried out extensive studies in which university students are given each of 20 different foods