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WorksheetsModule 3 Exercise 5
Total questions: 15
Worksheet time: 28mins
Population or Sample?
All trees in the MCHS mini forest
Population
Sample
Parameter or Statistic?
In a survey of 60 students in senior high school, 12% of the students have a final letter grade of A.
Parameter
Statistic
What sampling technique was used in this situation?
Every tenth person entering a mall is asked to name his or her favorite store.
Simple
Systematic
Stratified
Cluster
What sampling technique was used in this situation?
Chosen at random, 500 rural and 500 urban persons aged 65 and above are asked about their health and their experiences with prescription drugs.
Simple
Systematic
Stratified
Cluster
All possible samples of size 3 are drawn from the population with data values 3, 6, 9, and 12. Which of the following is the sampling distribution of the sample means?
Complete the table to determine the mean of the sampling distribution of the sample means. Use the formula provided. Do not round off the values in the last column.
5.25
5
4.25
4
Complete the table to determine the variance of the sampling distribution of the sample means. Use the formula provided. Do not round off the values in the 5th and 6th column. Round off the final answer to 2 decimal places.
0.69
0.83
0.91
0.80
If the variance of the sampling distribution of the sample means is 0.6875, then what is the standard deviation of the sampling distribution of the sample means? (2 decimal places)
0.83
0.69
0.47
0.80
Consider a population which is normally distributed. If
n=4 and σx=3 , what is σ2 ?
(a)
Consider a population which is normally distributed. If
σ=2 and n=2 , what is the variance of the sampling distribution of the sample means?
(a)
The results of a recent study show that the mean age of table users is 34 years. Suppose the standard deviation is 15 years. Take a sample of size n = 100. What is the mean of the sampling distribution of the sample means? (Do not label your answer.)
(a)
The results of a recent study show that the mean age of table users is 34 years. Suppose the standard deviation is 15 years. Take a sample of size n = 100. What is the standard deviation of the sampling distribution of the sample means)? (Do not label your answer.)
(a)
The average cholesterol content of a certain type of canned good is 215 milligrams, and the variance is 225 milligrams. What is the standard deviation? (Do not label your answer.)
(a)
The average cholesterol content of a certain canned good is 215 milligrams, and the standard deviation is 15 milligrams. Assume cholesterol content is normally distributed. If a canned good is selected, what is the probability that the cholesterol content will be greater than 220 milligrams? (Answer format: x.xxxx)
(a)
The average cholesterol content of a certain canned good is 215 milligrams, and the standard deviation is 15 milligrams. Assume cholesterol content is normally distributed. If a sample of 25 canned goods is randomly selected, what is the probability that the mean cholesterol content of the sample will be greater than 220 milligrams? .Round off the z-score value to 2 decimal places. (Answer format: x.xxxx)
(a)
