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Suppose you analyzed the average monthly credit card bill of Visa credit card customers using two randomly selected samples: one with 150 Visa credit card customers (Sample #1) and one with 99 Visa credit card customers (Sample #2). Every credit card customer in Sample #1 had a monthly credit card bill of $1,846. Sample #2, on the other hand, had an average monthly credit card bill of $1,888 with a variance of 1,340,992 ($)^2. If you combined these samples into one...
1) What is the combined monthly credit card bill median (in dollars)?
Professor James took a sample of 195 students from her morning class and a sample of 171 students from her evening class. On Exam 1, all those sampled from the morning class got a 63 while those sampled from the evening class averaged a 67 with a variance of 164. If Professor James combines these two samples ...
2) What is the combined Exam 1 average?
from experience we know that candidates from school x have a 60 probability of passing a licensure exam those from
Determine and interpret the p-value for the test. Source: Bureau of the Census, Statistical Abstract of the United States 2009, p. 163.
U.S. Census data for San Luis Obispo County, California, were used to construct the following frequency distribution for commute time (in minutes)
An English unit of mass used in pharmaceutical work is the grain (gr).15 gr=1.0g. An aspirin tablet contains 5.0 gr of aspirin. A 155-lbarthritic person takes a dosage of 2 asprin tablets per day. a. What is the quantity of aspirin in two tablets,..
A club has 225 members. If there is a 60% attendance rate per meeting, find the mean, variance, and standard deviation of the number of people who attend each meeting. Note that this is a binomial distribution.
Your company asks you to compare a new advertising campaign and the old one. Sample data on the accounts as follows:
pretest-posttest design and internal validity threats.answer the question either by writing the design name or by
A Bond is currently traded at Rs.950. Its face value is Rs.1000. Coupon rate is 10%. It is redeemable at par after 5 years from today. However the company has an option of calling it after 3 years from today at 5% premium. Find Yield To Call.
Let Y =1 if the second coin is heads, and Y =5 if the second coin is tails. Let Z =XY. What is the probability function of Z?
In Exercise the length of the confidence interval for µ is 257.6 - 200.7 = 56.9 and the length based on the trimmed mean is 244.9 - 196.7 = 48.2. Comment on why the length of the confidence interval for the trimmed mean is shorter.
Students in a statistics class at a large state university were given the survey in which one question asked was age (in years); one student was a retired person, and her age was an "outlier".
An investigator wants to show that first-born children score higher on IQ tests than second-borns. He takes a simple random sample of 400 two-child families in a school district, both children being enrolled in elementary school. He gives these ..
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