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1. State the critical (tabled) value of t that would be used to reject the null hypothesis of equality of population means, for an independent groups t-test under each of the following conditions:
2. For a post hoc power analysis, d = .60, α = .05 for a two-tailed t test, and the number of people in each of two groups = 30, the power of the t-test is approximately 0.61.
In terms of probability, what is meant by "mutual exclusivity"? Provide an example scenario where one might have data where in this feature is present and then when it is not
Suppose the mean amount of money a customer spends in one trip to the supermarket is $72.
Determine the probability that a butterfly is infected, given that it was tagged in both places. Enter an answer between 0 and 1, rounded to 2 decimal places, e.g. 0.31.
Time magazine (19 December 1994, p. 66) reported that of the approximately 1550 frequent binge drinkers in this study, 22% reported having had unprotected sex.
In problem, suppose the confidence interval contained the value 0.00. How could the banker's attorney use this information to defend his client?
a researcher in colorado is trying to improve plant growth. they want to see how combinations of different brands of
suppose we assume that the temperatures of healthy humans is approximately normal with a mean of 98.6 degrees and a
Use the january 2003 price as the base period and 100 as the base value to develop a simple index. By what percent has the cost of chicken increased?
Mutts Amazing Dogs has developed the following demand forecast for The Pitbull, a spicy concoction graced by pepper jack cheese, serrano, habanero, poblano and jalapeno peppers, onion, and a cilantro-lime aioli.
Tests of a new tire developed by a tire manufacturer led to an estimated mean tread life of 67,350 miles and standard deviation of 1,120 miles.
The Department of Education would like to determine if there are gender differences in the performance of twins on the state mandated mathematics examination. As a result, they have collected data on twelve sets of twins that are male and female. ..
What is a confidence interval, and why do some prefer them to single point estimates? Ask your manager what is preferred and why?
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