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Question: 1. Calculate the effect size index for the students' Doritos data, and interpret it using the conventions that researchers use.
2. In problem, you found that people who are successful in used car sales have significantly higher extraversion scores than those in the general population. What is the effect size index for those data and is the effect small, medium, or large?
Problem: The NEO PI-R is a personality test. The E stands for extraversion, one of the personality characteristics the test measures. The population mean for the extraversion test is 50. Suppose 13 people who were successful in used car sales took the test and produced a mean of 56.10 and a standard deviation of 10.00. Perform a t test and write a conclusion.
Construct a regression to predict Close (Closing Price) with a single trend using all days available. Interpret the overall model (i.e. R-Squared and F-Value), the coefficient value (slope) of the Trend independent variable and the corresponding s..
The probability that a randomly selected elementary or secondary school teacher from a city is female is 0.68, holds a second job is 0.38, and is female and holds a second job is 0.29.
Confidence interval for the average weight of a nickel. How many nickels does he need to weigh to obtain an average accurate to within 10 milligrams?
Give an example of some data that you could analyze with a Chi Square. Discuss the level of measurement that you would need to use this test.
Describe the population of interest and calculate the numerical value of the statistic that that the EPA will use to estimate p. Construct a 95% confidence interval for the proportion of Americans who live in neighborhoods with acceptable levels of ..
He reviews the last eight months at dealership B and finds the standard deviation of the eight monthly sales to be 22.95. Using the .01 significance level does the analyst find evidence that the boast of dealership A is correct?
the number of monthly breakdowns of a computer is a random variable having poisson distribution with lambda1.8. use
Compare value of test statistics F obtained in part(2) with value of t 2 , square of test statistic for testing H 0 : β 1 =0 that was needed in test null hypothesis that true slope is 0. Interpret the results of this test.
At the 0.05 level, can we con- clude that the geographical distribution of hotline callers could be the same as the U.S. population distribution?
there are 30 tennis balls in a box of which 18 are new and have never been used. three of the 30 balls are selected at
Determine new, standardized score for each of following values from original population.
Draw a picture of each of the following distributions. Shade the area above the value given, and label the proportion of the distribution that falls in that region, as in given Figure.
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