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A major snack food company has started an advertising campaign claiming that it makes "America's favorite potato chip." To test this claim, a researcher assembles a sample of 90 volunteers and asks each individual to taste the company's chips along with two other brands. Each individual is asked to select a favorite from the three brands. The following data show the number of individuals selecting each brand. Do the data provide significant support for any preferences among the three brands? Test At the .05 level of significance.
Brand A
Brand B
Brand C
38
28
24
If two independent large samples are taken from two populations, the sampling distribution of the difference between the two sample means:
Use the list of random digits below to assign 4 men and 2 women to the shark fin treatment. Read the table from left to right, first selecting the 4 men and then the 2 women. Use the numerical labels given in the chart to the names.
In a regression analysis involving 30 observations, the following estimated regression equation was obtained.
The random variable x is known to be uniformly distributed between 1.0 and 1.5.
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.
To test whether there is a significant mean difference among the three.
To forcast the sample size within 0.02 with 90 percent confidence. The CEO of the organization needs to forcast the proportion of Canadians who own their house.
Using the p- value approach, test the hypotheses at the 5% level of significance.
Assuming the nurses surveyed were a simple random sample from the population of all nurses in the United States, find the appropriate null hypothesis for these data
Clark Heter is an industrial engineer at Lyons Products. He would like to conclude whether there are more units produced on the afternoon shift than on the day shift. A sample of 54 day-shift workers showed that the mean number of units produced w..
The Wilcoxon signed rank statistic, The mean for the Wilcoxon signed rank test and The P-value for the Wilcoxon signed rank test
Determine the range and standard deviation of the times.
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