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Test the significant difference between two mean.
We recalculated our comparison of ideal number of children, this time only for women, separating them into two groups, those who indicated that they were "very happy" or "not at all happy" with life. Results are presented below.
Very Happy
Not Happy at All
Mean ideal number of children
3.32
2.07
Standard deviation
2.91
1.52
V
338
119
Obtained t statistic
1.99
Based on a two-tailed test, α = 0.05. What do you conclude?
Robinson & Associates performs employment screening for large companies in southern California. It usually follows two-step process. First potential applicants are given a test that covers basic knowledge and intelligence. If applicants score b..
Construct the 90% confidence interval for the true population proportion of all voters in the state who favor approval.
Costs of Televisions Listed below are prices (in dollars) and quality rating scores of rare-projection televisions (based on data from Consumer Reports). All of the televisions have screen sizes of 55 in or 56 in.
Based on the sample findings, estimate the true mean of Saturday sales with 90% probability.
Results were analyzed using one -way ANOVA and included SSTR =7 , 102 and SSE = 10 ,511. Are all 8 tapes equally appealing on average? Determine p value?
Determine the strength of the causal relationship between monthly sales and new home construction by using correlation.
Perform the appropriate test for a difference in mean blood glucose and report the p-value for the two-tailed test of significance, assuming that the variances are equal.
Katie is studying aggression among adolescent girls. She believes that there is a relationship between the level of interaction a girl has with her mother and her level of aggression.
prevent coronary artery vasoconstriction and the attendant reduction in blood flow to the heart and mechanical function.
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
If we want to increase our confidence level from 95% to 99%, what happens to our confidence interval?
What does the coefficient of determination tell you about the variation attendance and the variation in the number of exhibitors?
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