All airplanes in the United States are inspected annually by the Federal Aviation Administration (FAA).
For each airplane, the variables measured include hours of use since last inspection, type of repairs since last inspection, and structural condition of wings. Identify each of these variables as quantitative or qualitative, the data collection method, and whether or not the data represent a population or a sample.
Q. 2For the following conditions, determine if it is appropriate to use the normal distribution to approximate a binomial distribution with n = 8 and p = 0.3.
What will be an ideal response?
Q. 3If the slope of the true regression line is zero, then the slope of the sample regression line may be different from
zero.
Indicate whether the statement is true or false
Q. 4If coding is used to calculate the mean more easily for a frequency distribution with seven classes, the coded
value of the second class is _______ .
Fill in the blank(s) with correct word
Q. 5A denominator of (n - 1 ) in the defining formula for a standard deviation indicates that the formula measures
the variance of a _______ .
Fill in the blank(s) with correct word
Q. 6A quiz consists of 50 true or false questions. If the student guesses on each question, what is the standard deviation of the number of correct answers?
A) 5 B) 2 C) 3.53553391 D) 0
Q. 7The standard deviation is a measure of the theoretical average value that a distribution is likely to assume for a
large number of trials.
Indicate whether the statement is true or false
Q. 8A bar chart of a frequency distribution is called a _______ .
Fill in the blank(s) with correct word
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