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Two kinds of errors can occur when deciding whether or not to reject the null hypothesis, a type I error or type II error. In the type I error, as the researcher I reject my null hypothesis when it is true. A type II error occurs when I accept my null hypothesis, when it is false. This can happen when the research tools aren't reliable enough to detect differences between groups or categories.
What types of unreliable research tools or methods may account for this?
suppose the prelliminary results were as follows group 1 n=310,p=32 and group 2 n=309,p=20 construct a 95% confidence interval for the difference in proportions of patients with new hair growth for the two groups using the given data.
This week we're reading across disciplines: history, philosophy, music, art, Europe, America, Asia...welcome to the Humanities. Hence our discussion will focus on influences. How does history, the social movement of time and place, influence art?
Suppose that a survey is being planned for purposes of estimating the average number of hours spent exercising daily by adults (18 years of age or older) living in a certain community.
suppose you went to the bureau of labor statistics web site and found several predictors of your salary. state three
Grades. A Statistics instructor created a linear regression equation to predict students' final exam scores from their midterm exam scores.
a scientific committee of 4 persons is to be randomly selected from a group consisting of 3 biologists 3 physicists and
SAT scores (out of 2400) are distributed normally with a mean of 1500 and a standard deviation of 300. Suppose a school council awards
Write the following compound statements in symbolic form, then use your knowledge of the historical events referred to by the simple statements to determine the truth value of the compound statements.- Washington was assassinated only if Edison in..
An appliance store sells 20 refrigerators each week. Ten percent of all purchasers of a refrigerator buy an extended warranty.
what size sample will be needed to construct a 95 confidence interval on a ballot issue if the estimate must be plusmn
What is the regression line? Give an example of simple correlation between two variables.
In a survey of 4013 adults, 707 oppose allowing transgender students to use the bathrooms of the opposite biological sex.
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