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We are interested in relationship satisfaction of young adults before and after they go off to college/university which separates them from their sweat-heart. We collect a sample of young adults which are about to be separated from their significant other by going to college and have them rate their satisfaction with the relationship. Then, after they have spent the first semester at colleges/universities (away from their significant other), they again rate their relationship satisfaction. Is there a difference?
PERSON
TIME 1
TIME 2
A
34
30
B
41
43
C
36
40
D
44
E
28
19
question the selling prices in thousands of dollars for a sample of 15 recreational vehicles sold by getaway rvs and
At the 0.05 significance level, is there a difference in the proportion of viewers watching the three channels? State the null and alternative hypothesis. Identify the level of significance: Given at 0.05
A student scores 91 on the midterm exam for physics. Assume the class scores are normally distributed, with a mean of 65 and standard deviation of 15. Into what percentile does this student fall?
An urn contains 8 green balls, 5 red balls, and 7 white balls. How many ways are there to draw a green ball or a red ball?
Blockbuster is testing a new policy of waiving all late fees on DVD rentals using a sample of 10 randomly chosen customers.
A behavioral research situation that could use a Pearson coefficient research study and a chi square research study. Present the rationale for each selection. Be very specific in your presentation.
a local university administers a comprehensive examination to the recipients of a b.s. degree in business
Suppose it has been determined that the average number of customers waiting for service is 1.929. There are two servers. Determine:
Find the probability of failure of system for any 4 hours of operation?
the proportion of students in private schools is around 11. a random sample of 450 students from a wide geographic area
Carbon monoxide emissions for a certain kind of cary vary with mean 2.9 gm/mi and standard deviation 0.4 gm/mi. A company has 80 of these cars. Estimate the probability that the mean CO level is between 3.0 and 3.1 gm/mi.
let x bar 10000 be the fraction of heads in 10000 tosses. use chebyshevs inequality to bound pxbarn - 12 is greater
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