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Question: Refer to Exercise.
a. What is the population of interest to the faculty senate?
b. What is the sampling frame?
c. What is the sample?
d. Is the sample representative of the population of interest? Explain.
Exercise: The faculty senate at a large university wanted to know what proportion of the students thought that a foreign language should be required for everyone. The statistics department offered to cooperate in conducting a survey, and a simple random sample of 500 students was selected from all students enrolled in statistics classes. A survey form was sent by e-mail to these 500 students. For parts (a) to (c) discuss the extent to which the specified type of bias would be likely to occur in this survey:
a. Selection bias.
b. Nonresponse bias.
c. Response bias.
d. Which of these three types of bias do you think would be the most serious? Explain.
High profits provide the incentive for firms to expand output and for more firms to enter the industry in the long run. For a firm of above-average efficiency.
Fixed costs of $9,200 per month and variable costs of 70 cents per unit produced. Each item is sold to retailers at a price that averages 90 cents.
a precision drill positioned over a target point will make an acceptable hole if it is within 5 microns of the target.
Is there any evidence to suggest that the mean amount of corrosive material carried by trucks in North Carolina is different from the mean amount of corrosive material carried by trucks in Virginia?
Develop the appropriate 3-sigma control chart(s) for monitoring this process. Does it appear that the delivery process is in control?
How many of this younger age group must we survey in order to estimate the proportion of non-grads to within 8% with 90% confidence?
The subjects are asked their opinions about sex and marriage, attitudes toward women, welfare, foreign policy and many other issues. The implied population is All Americans.
TRAFFIC LIGHTS What is the probability of arriving at a traffic light when it is red if the red signal is lit for 30 sec, the yellow signal for 5 sec.
A machine produces safety devices for use in helicopters. A quality-control engineer regularly checks samples of the devices produced by the machine.
1.a statistics instructor wants to know which route will get her to school the fastest. each day from october 2 to
A survey of 400 persons showed that 54.3% were in favor of product A. Test whether a majority were in favor of product A using a .05 significance level
If the true proportion of transactions that had errors was 6% that day, what is the probability that the estimated proportion is less than 5%?
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