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Below are two groups:
A: 15, 22, 19, 25, 16
B: 32, 25, 27, 33, 21, 35, 30
a) Test to see if the variances are the same: give the null and alternate hypotheses; then the test statistic and critical value; finally decide if you accept or reject this null hypothesis at the 5% level.
b) Now do the same for the means of the two groups.
Why is cohort studies more expensive than case-control studies? I know one problem is cohort studies often must be followed up for a long period to determine whether the outcome of interest has developed and they are more expense than case-control..
q1. hallux abducto valgus call it havis a deformation of the big toe that often requires surgery. doctors used x-rays
Is there a relationship between sales and newspaper advertising? Support your answer?
1. a researcher for reasons passing understanding wishes to assess the association between gender and total cholesterol
The selection committee of the club is willing to use a 0.01 significance level. You are required to find out whether Amod's salary will be cut next year.
Assuming the weight of cereal is normally distributed, determine the likelihood that a package will contain more that 12.2 ounces?
Figures for the yearly crime rate (the number of crimes per 1,000 population) in Mississippi, USA from 1993 to 2002 are as follows:
Test the claim that the mean age of the prison population in one city is less than 26 years. Sample data are summarized as n = 25, x = 24.4 years, and s = 9.2 years. Use a significance level of α = 0.05.
you want to estimate the standard deviation of the population of current annual incomes of adults in the united states.
Determine the 95% confidence interval for your estimate what data have you utilized as the basis of your predictions what suppositions have you made.
if one card is drawn from a standard 52 card playing deck determine the probability of getting a jack a three a club or
Develop a pie chart to summarize these contributions. Develop a bar chart to summarize these contributions and why is it appropriate to construct a bar chart for these data instead of a histogram?
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