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A marketing firm recently studied the number of times men and women who live alone that buy takeout dinners in a month. Two independent samples were taken one with 50 men and 55 women. The mean is 34.51 for men with a standard deviation of 3.48 and a mean of 29.44 with a standard deviation of 2.86. Conduct a two tailed hypothesis test at a significance level of .05 to see if the two means are different.
Generate a relative frequency histogram using ten-point intervals to show the distribution of the scores.
If the manufacturer stocks 100 components, what is the probability that the 100 orders can be filled without reordering components?
For a given confidence interval, what is the interpretation of a 96% confidence level?
One should never use a regression line to predict the dependent response variable when the independent value is outside of the data range of the original data set that was used to fit the line.
Recognize independent variable and dependent variable for this experiment. Think in your head what influences what? Or, what causes what? Cause is independent variable.
Descriptive statistic results from quarterly sales figures over a 18 year period (73 qtr) are below. Please interpret the standard Deviation and Median in terms of sales results,
Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.
If there is a negative dependent variable of -0.55, and independent variables Y1 of +0.75 and Y2 of -3.0, how do I interpret the relationships according to the signs?
A survey of 500 internet users found that the users were online an average of 6.5 hours a week with a standard deviation of 3.1 hours. If 49 internet users are randomly selected what is the probability that their average time online will be more t..
The mean of a normal probability distribution is 60; the standard deviation is 5.
What is the probability that they all hit the target?
Why are you no longer directly comparing sample means? How does using the F test - the analysis of variance (ANOVA) reduce your Type I error rate? What is the difference between a within-groups and a between-groups variance?
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