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Study Questions:
Excel users should note that any row containing one or two empty cells must be removed. Use a 5% significance level. For each of the following variables, conduct a test to deter- mine whether there are differences between the three political party affiliations (PARTY3: 1 = Democrat, 2 = Republican, 3 = Independent ).
Read about campaign in newspaper (READ)
Exercise 13.25 required you to conduct a t-test of the difference between two means. Each samples productivity data are required to be normally distributed. Is that required condition violated? Test with α = .05.
Describe the similarities between an F-ratio and a t statistic. The basic relationship between t statistic and F-ratios can be stated in an equation. What is that equation?
You read a report that says, "On the basis of the simple random sample of 100 high school seniors that took the SATM test this year, a confidence interval for µ is found to be 512.00 ± 25.76." What was the confidence level used to calculate this..
The following data represents the running time of films produced by 2 motion picture companies. Assume these are independent samples
data from a small bookstore are shown in the table below. the correlation for the data is 0.967. complete parts a
Do these data establish, at the 5 percent level of significance, that the number of dental cavities a person has is not independent of whether that person's water supply is fluoridated? What about at the 1 percent level?
What is the probability of a type 1 error in this situation? What does it mean?
1 an important measure of the performance of a locomotive is its adhesion which is the locomotives pulling force as a
An averages of four tax evaders per 100 tax filers. If 50 tax filers are randomly selected from the state, what is the probability of the following:
let x and y be independent and identically distributed random variables with common standard normal pdf offz
In an article entitled "Fuel Economy Calculations to Be Altered," James R. Healey indicated that the government planned to change how it calculates fuel economy for new cars and trucks.
how many different ways can ten couples mf be seated in a row of twenty seats such that the couples can be kept
What proportion of corks produced by this machine are defective - The specifications call for corks with diameters between 1.9 and 2.1 cm. A cork not meeting the specifications is considered defective.
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