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The information below represents five baskets of apples containing the quantities shown below.
Baskets
Number of Pencils
(Population)
1
30
2
18
3
4
33
5
36
(a) How many different samples of two baskets each are there?
(b) List all possible samples of size two and compute the mean of each sample.
(c) Calculate the population mean and compare it to the mean of the sampling distribution.
Support casinos in the sample? B) calculate a 95% confidence interval to estimate the population proportion of all residents who wupport casinos.
It is not unusual for a battery to have life span that is more than 2470 hours as the z-score is within 2 standard deviations of mean.
a sample of 55 night-school students ages is obtained in order to estimate the mean age of night-school students. x 25
An airline estimates that 98% of people booked on their flights actually show up. If the airline books 76 people on a flight for which the maximum number is 74
a chemical engineer wants to fit a straight line to the data found observing the tensile strength y of 10 test pieces
At the .05 significance level, can we conclude that there is a difference in their mean times?
assume that the mean score on a certain aptitude test across the nation is 100 and that the standard deviation is 20
We wish to compare the average sales in two shops, to see if the population mean of the first one is higher than the second one. One shop had 100 sales averaging $94, with a standard deviation of $40.
What are the advantages and disadvantages of the surveying methods you did not used and what type of score did you use why?
Explain whether the authors used a population or a sample. Explain how this could have affected the results. If a sample was used, was it representative of the entire population? Why or why not?
Standard deviation = 30 (Source: U.S. National Center for Health Statistics). Levels above 200 warrant attention. Find the probability that a teenage boy has a cholesterol level greater than 200.
Group of businesswomen wish to open a high fashion boutique in a vacant store but only if the average income in the area is at least $45,000. Use alpha=0.01 to test whether or not the businesswomen should open their boutique in this neighborhood.
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