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Container 1 has 10 items, 3 of which are defective. Container 2 has 6 items, 2 of which are defective. If one item is drawn independently from each container:
Find the probability distribution for X defined as the number of defective items drawn (Hint: You have to find P(X=0), P(X=1) and P(X=2). You may have to use both multiplicative and additive rules to find P (X=1)).
Two mating parts have critical dimensions x1 and x2 as shown below. Assume that x1 and x2 are normally distributed with means 1 and mean2 and standard deviations s1 = 0.400 and s2 = 0.300.
Use PHStat to make a box-whisker plot. If PHSTAT has yet to be installed, calculate Xmin, Xmax, Q 1 , Q 3 and median using equation in Class Notes-Quartiles, Percentile & Dectiles.
Set up the following null and alternative hypotheses for both factors and their interaction. You should have three verbal statements, not symbolized statements.
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
Calculate the z - scores for the three samples, compare the z score to the t-statistic, is the null hypothesis accepted or rejected?
Your customers have been divided into 3 groups. The first group represents 15% of customers, and these customers spent an average of $29.76 last year.
The heights of young women are approximately normal with mean 65 inches and standard deviation 2.5 inches.
Suppose a botanist grows many individually potted eggplants, all treated identically and arranged in groups of four pots on the greenhouse bench.
Do you believe that the government should or should not be allowed to prohibit teachers from expressing their religious beliefs in public schools classrooms?
Test scores on a university admissions test are normally distributed, with a mean of 500 and a standard deviation of 100. a) What is the probability that a randomly selected applicant scores between 425 and 575?
Suppose that 40% of cars in your area are manufactured in the United States, 30% in Japan, 10% in Germany, and 20% in other countries. If you randomly select 6 cars, what is the probability that two of them are Japanese?
Researchers wanted to determine if there is a difference in the mean credit card debt owed by males versus females. Using α = 0.10, is there a difference. (Show all six steps of hypothesis testing.)
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