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Question 1. The percent confidence interval is the range having the percent probability of containing the actual population parameter. True False Question 2. The Chi-square test for independence is an extension of the goodness of fit test to see if multiple groups are distributed according to expected distributions for each variable. True False Question 3. A contingency table is a multiple row and multiple column table showing counts in each cell. True False Question 4. Statistical significance in the Chi-square test means the population distribution (expected) is not the source of the sample (observed) data. True False Question 5. Point estimates provide less confidence in indicating a parameter's value than a confidence interval. True False Question 6. If the confidence interval for mean differences contains a 0, the associated t-test would have shown a significant difference. True False Question 7. The Chi-square test can be performed on categorical (nominal) level data. True False Question 8. The goodness of fit test can be used for a single or multiple set (rows) of data, such as comparing male and female age distributions with an expected distribution at the same time. True False Question 9. In confidence intervals, the width of the interval depends only on the variation within the data set. True False Question 10Confidence intervals provide an indication of how much variation exists in the data set. True False
A company has established a goal of processing 95 percent of its orders on the same date of receipt. However, only 485 out of 500 orders were actually processed on the same day
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02.
Distributed with mean 4.6 minutes and standard deviation 1.4 minutes. If there are 75 students in class, determine probability the professor requires more than 6 hours to mark all of the midterms?
What is the 95% confidence interval estimate of the population mean cost for a prescription of Zocor?
The length of a Colorado brook trout is normally distributed. What is the probability that a brook trout's length, (Round your answers to 4 decimal places.)
The “test of independence” and the “test of homogeneity” are completed in identical fashion, using the contingency table to display and organize the calculations. Explain how these two hypothesis tests differ.
Dotties Tax Service specializes in federal tax returns for professional clients, such as physicians, dentists, accountants, and lawyers.
There are 500 employees in a firm, 45% are female. A sample of 60 employees is selected randomly. (a) Determine the standard error of the proportion.
compute the correlation coefficient for the data below. what is the equation for the regression line if n=7, Ex=69, Ey=528 Exy=4754 and Ex^2=825
Quadratic equations can be solved by graphing, using the quadratic formula, completing the square, and factoring. What are the pros and cons of each of these methods?
The probability that you win is 6/36=1/6, and P(loss) = 5/6. Find a rough range for a) 200 plays, (b) 20, 000 plays. You must show your work when you compute the SD of the box.
What is the probablity that there are no tremors in a 1-month period? What is the probability tha there are more than 5 tremors in a 6-month period?
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