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What is the null hypothesis in a chi-squared test of independence?
Week introduces the chi-square goodness-of-fit-test, which looks for differences across independent groups. Since this is similar to the independent t-tes
Develop three regression models to predict the selling price base~ upon each of' the other factors individually. Which of these is best?
A researcher used stepwise regression to create regression models to predict BirthRate (births per 1,000) using five predictors.
In the following regression, X = total assets ($ billions), Y = total revenue ($ billions), and n = 64 large banks.
Read the article "Prevalence and Characteristics of Hazardous Drinkers: Results of the Greater Milwaukee Survey" by Lisa K. Berger, PhD; Michael Fendrich
What is the forecast for October, being advertising expendeitures of 1000, doughnut sales of 2450, and swim gear sales of 782 in September?
Hypothesis testing is really a systematic way to test claims or ideas about a group or population.
Newburg Park, Florida is a popular, beach resort town. Property values are fairly high there and, as such, are rather well studied.
Develop a research question using gender and another categorical variable associated to adhd that could be address using the chi-square method?
The annual salaries of 16 randomly chosen actuaries are listed below. At a= 0.02 can you conclude the standard deviation of the annual salaries
What is the null hypothesis? In this F-test, what are the degrees of freedom in the numerator? The denominator?
During the first 13 weeks of the television season, the Saturday evening 8:00 p.m. to 9:00 p.m. audience proportions were recorded as ABC 29%, CBS 28%, NBC 25%
Suppose Smith and Wilson is a relatively small West Coast advertising agency. Assume that they have hired you to help in their newly established advertising
For this case, we will examine some hypothetical data concerning interest rates and the number of housing starts per month.
The marketing manager of a large supermarket chain has the business objective of using shelf space most efficiently.
Develop a linear regression model for these data and forecast carpet sales if 30 constructive permits for new homes are filed.
Chi-square analysis can be used with both Goodness-of-Fit Tests and with Tests for Independence. There are specific instances when each test should be used
Run the chi-squared test to determine if responses between agree categories and disagree categories(2 categories), for each Likert item
Teens were asked in MTF 2008 survey how often they think about social issues (specific issues were not identified).
Is the number of children that a college student currently has independent of the type of college or university being attended
Test the question that an equal number of boys (code = 1) and girls (code = 2) participate in soccer at the elementary level at the .01 level of significance.
Internet Recruiting The percentage of fortune Global 500 firms that actively recruited workers on the internet from 1998 through 2000
Using the following data, test the question that an equal number of Democrats, Republicans, and Independents voted during the most recent election.
What would be the mean of the test statistic if the null hypothesis were true? The value of the statistic is so far above this mean that you can see at once