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Scrap rates per thousand (parts whose defects cannot be reworked) are compared for 5 randomly selected days at three plants. Does the data prove a significant difference in mean scrap rates?
ScrapRate
Plant A Plant B Plant C
11.4 11.1 10.2
12.5 14.1 9.5
10.1 16.8 9.0
13.8 13.2 13.3
13.7 14.6 5.9
Find out the probability distribution of blood types by gender in the group of 1000 individuals.The table below gives the distribution of blood types by gender in a group of 1000 individuals.
If true explain and if false give an example. a. The significance level of a statistical test is equal to the probability that the null hypothesis is true. b. If the significance level of a test is decreased, the power of the test would be expected t..
In a simple linear regression analysis of 18 data points the following ANOVA table was found.
What is the null hypothesis? What is your decision if a = 0.01?
A seven year old study reported that women whose mothers used the drug DES during pregnancy were twice as likely to develop tissue abnormalities that might lead to cancer as women whose mothers did not take the the drug.
To find out the test statistics utilizing chi square method. A professional bowler has been having trouble 'hitting the pocket' in order to get strikes.
A multiple regression equation for list price of homes in certain community in USA is=170,000 -850 X 1 + 28,000 X 2 , where X 1 signifies age in years and X 2 signifies number of rooms.
Use a .10 level of significance to test the claim that the variance of all scores in the population is more than 9.
What percent of sales representatives earn more than $42,000 per year?
At a 5% level of significance, is there sufficient evidence that the population mean waiting time is now less than 3.7 minutes?
Determine estimated average starting salary for school with average GMAT of 600 points?
Compute the value of the proportion of the population.
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