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Quiz



This activity contains 15 questions.

Question 1.
Which of the following is not a property of point estimates?

 
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Question 2.
Determine the critical value of t for ch08-02a.gif and ch08-02b.gif.

 
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Question 3.
Give the lower and upper critical values of ch08-03a.gif for a 90% confidence interval and ch08-03b.gif.

 
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Question 4.
Estimate the 98% confidence interval estimate for the population variance when ch08-04a.gif and ch08-04b.gif.

 
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Question 5.
The equation for the prediction interval estimate is:

 
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Question 6.
An interval that includes a certain proportion of measurements with a stated confidence is called a:

 
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Question 7.
The effect of the sample size on the usefulness of the estimator refers to __________.

 
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Question 8.
A chi square distribution is a skewed distribution and its shape depends on its __________.

 
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Question 9.
Suppose on average there are nine typographical errors for every 175 pages of a textbook. Find the confidence interval estimate for the proportion with a 95% level of confidence.

 
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Question 10.
The formula for a two-sided tolerance interval in a normal population is:

 
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Question 11.
With a sample size of 120 or more, s closely approximates sigma.gif precisely so that there is little difference between the __________ and __________ distributions.

 
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Question 12.
The t distribution assumes that the random variable X being studied has a:

 
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Question 13.
The symbol used for a population proportion is:

 
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Question 14.
Find the Z values corresponding to a 99% confidence level.

 
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Question 15.
Determine the critical t value for a 98% confidence level and 15 degrees of freedom.

 
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