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Test the claim that the mean lifetime of a car engine of a particular kind is greater than 220,000 miles. Sample data are summarized as n=23, x=226,450 miles, and s=11,500 miles. Make use of a signi
The health of employees is monitored by periodically, weighing them in. A sample of 54 has a mean weight of 183.9 lb. assuming that s is known to be 121.2 lb, employ a 0.10 significance level to tes
The following tables describes information regarding the top women-owned businesses in U.S. The first table gives year 2000 revenue in millions of dollars and number of employees for Pennsylvania wo
According to a recent poll 53 percent of Americans would vote for the incumbent president. If a random sample of 100 people results in 45 percent who would vote for the incumbent, test claim that th
Using fact that Martha believes the treatment will reduce the amount of time to fall asleep, state the null and alternate hypotheses.
This lab asks you to analyze a simple matched-groups design in two ways: using the dependent groups' test, and analyzing the similar data as a randomized blocks design with p=2 levels of the within-
This lab asks you to analyze a simple matched-groups design in two ways: using the dependent group's t test, and analyzing the same data as a randomized blocks create with p=2 levels of the within-s
The display represents a MINITAB output for two-way ANOVA. Suppose that the amount of the pesticide is not affected by an interaction between site and age.
Test the given claim. Utilize a significance level of α = 0.05, and assume that the population are normally distributed.
A manager would like to know which of following factrors has the strongest link to the salary an employee earns : age , gender, experience, time at the firm or education .
Write down the linear regression equation to predict father's education from the mother's education? Based upon the results of linear regression, can you reject the null hypothesis that there is no
explain the Study of Variance for SAT
The show represents Excel output for an ANOVA analysis with σ = 0.05.
A study conducted on the annual incomes of Teachers in the state of California in metropolitan areas having a population less than 100,000 and in metropolitan areas having a population over 500,000.
At the 0.01 level of significance, is the mean grade of the female students higher than that of males.
Production costs for the large number of previous orders of varying sizes for product are in file production.xls. An analyst evaluates the production cost per unit in each order and averages these t
The Product Design & Marketing Departments have agreed to consider changing the material used for the handle of an ax produced by their firm for consumer use. The material currently used is hick
In order to evaluate the means of two populations, independent random samples of 484 observations are selected from each population, with the following results.
Compute using SPSS the association between smoking and esophageal cancer and then by using SPSS the association between dichotomized smoking variable and esophageal cancer using SPSS.
Test the claim that the two samples described below come from populations with the same mean. Presume that the samples are independent simple random samples. Utilize a significance level of 0.04.
Two independent samples have been selected, 92 observations from population 1 and 72 observations from population 2. The sample means have been calculated to be ~x= 6.9 and x2 = 11.4.
A paired difference experiment yielded and pairs of observations. In each case described below, what is the rejection region for testing H0: mean= 6 against Ha: mean >6. Utilize standard deviation
Compute using SPSS association between smoking and esophageal cancer and then by using SPSS association between the dichotomized smoking variable and esophageal cancer by using SPSS.
Conduct a paired difference test described above. The test statistic is?
A manager would like to know relationship between billable hours spent on the job the total cost of job including materials.The file jobs.xls contains the data. Summarize the relationship.