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1. As part of a curriculum review, the psychology department would like to select a simple random sample of 20 of last year's 140 graduates to obtain information on how graduates perceived the value of the curriculum. Describe two different methods that might be used to select the sample.
2. A petition with 500 signatures is submitted to a university's student council. The council president would like to determine the proportion of those who signed the petition who are actually registered students at the university. There is not enough time to check all 500 names with the registrar, so the council president decides to select a simple random sample of 30 signatures. Describe how this might be done.
according to the internal revenue service the mean tax refund for the year 2007 was 2708. assume the standard deviation
JBGHI demands a sample large enough to ensure an error of ± 2% with 90% confidence. What is the necessary sample size?
the quantity of milk in a bottle is normally distributed with mean 1000ml. find the standard deviation given that the
the annual demand for inventory item p-2001 is 6000. order lead time is 6 workdays and the firms year is 300 days 6
What is the difference between hypothesis and theory? If there is a difference between the two, what comes first - hypothesis or theory?
a probability-minded despot offers a convicted murderer a final chance to gain his release. the prisoner is given
The service manager of Appliance Universe has recorded the times for a simple random sample of 50 refrigerator service calls taken from last year's service records. The sample mean and standard deviation were 25 minutes and 10 minutes, respectivel..
use the following information to answer the question. in a recent poll of 1200 randomly selected adult office workers
heart failure is due to either natural occurrences 87 or outside factors 13. outside factors are related to induced
1. The local county is considering a budget proposal that would reallocate funding to renovate the city pools. A survey is conducted to measure public opinion of the proposal. A total of 200 individuals responded to the survey. Fifty of the respon..
The sample sizes are unequal. Research question: Are the mean annual attendance rates the same for employees in these three departments?
Diastolic blood pressure are assumed to follow a normal distribution with a mean of 85 and a standard deviation of 12.
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