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Compute the effect size for each of the following average SAT math scores. Remember SAT math is standardized such that u= 500 and standard deviation =100.
a. 61 people sampled have a mean of 480.
b. 82 people have a mean of 520.
c. 6 people have a mean of 610.
A professor wants to conduct a study to know whether the grades she gives to her students affect their evaluations of her. She teaches four classes of ten students each.
A GSS asked. "What do you think is the ideal number of children for a family to have? the 497 female who responded had a median of 2, mean of 3.02 and standard deviation of 1.81 (a) Report the point estimate of the population mean.
Labor negotiations estimate that 30 percent of all major contract negotiations result in a strike. During the next year, 12 major contracts must be negotiated. Determine the following probabilities.
Compute a 95% confidence interval for the mean difference in the percentage of bone loss between two groups.
SAT Math scores have a bell-shaped distribution with a mean of 515 and a standard deviation of 116. a) what percentage of SAT scores are between 399 and 631?
The distributor selects one cable at random from among all cables in stock. If the cable selected is found to meet the strength specifications, what is the probability that the cable was produced at Plant A?
In forestry there appears to be a correlation between the diameter of a tree at breast height and the totol height of the tree. For the following sample of ten white spruces first construct a scatter plot then find the correlation (r) between heig..
If a garage is robbed, what is the probability the doors were left open?
what statement should be made about the null and alternative hypothesis based on sample data and significance level?
When is it important to have matched pairs rather than two independent sets of data?
Determine the estimated population mean?
In Excel, which of the following functions is used to conduct a hypothesis test (using the p -value) for a population variance
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