If two consecutive class intervals of a frequency distribution are 60-67 and 68-75, the class boundaries of the
second interval are 68.95-75.95.
Indicate whether the statement is true or false
Q. 2State whether each of the following variables measured on patients at a hospital is quantitative or qualitative.
a. previously admitted or not
b. age
c. type of health insurance
d. days of stay in hospital
Q. 3Does regular exercise decrease the risk of cancer? A researcher finds 200 women over 50 who exercise regularly, pairs each with a woman who has a similar medical history but does not exercise, then follows subjects for 10 years to see which group
develops more cancer. This is a
A) retrospective study
B) prospective study
C) matched experiment
D) survey
E) randomized experiment
Q. 4The formula for SST in a two-factor experiment is the same as for a complete-block experiment.
Indicate whether the statement is true or false
Q. 5The value r2 can assume any value between ______________ .
Fill in the blank(s) with correct word
Q. 6The symbol y gives the true mean of y for a given value of x = x0.
Indicate whether the statement is true or false
Q. 7When considering area under the standard normal curve, decide whether the area between z = -1.5 and z = 1.1
is bigger than, smaller than, or equal to the area between z = -1.1 and z = 1.5.
A) equal to B) bigger than C) smaller than
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