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Suppose that a box contains 25 light bulbs, of which 20 are good and the other 5 are defective. Consider randomly selecting three bulbs without replacement. Let E denote the event that the first bulb selected is good, F be the event that the second bulb is good, and G represent the event that the third bulb selected is good.
a. What is P 1E 2 ?
b. What is P 1F 0 E 2 ?
c. What is P 1G 0 E n F 2 ?
d. What is the probability that all three selected bulbs are good?
Create the 95% confidence interval about mean value of y, number of days absent, given x = 95 degrees, and = 0.449x - 30.27
Prepare a critical analysis of a quantitative study focusing on protection of human participants, data collection, data management and analysis, problem statement, and interpretation of findings.
At the .05 significance level, can we conclude that there is a difference in their mean times?
Stock A has an expected return of 12% and a standard deviation of 40%. Stock B has an expected return of 18% and a standard deviation of 60%. The correlation coefficient between Stocks A and B is 0.2.
State a type I error and describe why it happens. Describe the factor that researcher can control to change type I error. Also, describe how type I errors can be avoided.
an ecologist is studying the effects of predation on the behaviour of the common rabbit. during one hours of
If you had a sample size of 50 and did not know the standard deviation of the population, would you use a t or a z statistics in your analysis? Why?
The publisher reports that 80% of college professors require or recommend that their students purchase some type of textbook package.
Calculate the test statistic. Determine the p-value of the test-statistic.
a simple random sample of 16 different cereals is obtained and the sugar content in grams of sugar per gram of ceral is
barbara is a research biologist for green carpet lawns. she is studying the effects of fertilizer type temperature at
a. If the airbag activates at a deceleration of 12 mph/s or more, Iacocca would get hurt. What is the probability of his being hurt in this demon- stration? b. What is the mean deceleration at airbag activation moment? c. What is the standard devi..
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