1) A survey conducted to determine the textbook expenses states that fulltime students spend an average of $250 for textbooks each semester. The standard deviation of the amounts fulltime students spend for textbooks per semester is known to be $50. The distribution of the amount spend on textbooks is found to be bell-shaped. What is the probability that a randomly selected student spends more than $300 for textbooks each semester?

Select one:

a.68%

b.34%

c.32%

d.16%

e.8%

2) Kendra orders five handmade mugs from an online site that claims that it averages only five damaged mug for every 50,000 mugs it produces. What is the probability that Kendra's order contains one or more defective pieces?

Select one:

a.0.0001

b.0.9999

c.0.0005

d.0.9996

e.0.0004

3) A fair die is rolled. What is the probability that the number rolled is seven?

Select one:

a.0

b.1

c.1/2

d.1/4

e.3/4

4) Sean orders 20 pairs of gloves from an online clothing manufacturer. The site claims that it averages only 12 damaged pair of gloves for every 45,000 pair it produces. What is the probability that there are no defective pieces in his order?

Select one:

a.0.994

b.0.006

c.0.000

d.0.860

e.0.140

5) _____ is the branch of statistics that involves organizing, displaying, and describing data.

Select one:

a.Inferential statistics

b.Descriptive statistics

c.Mathematical statistics

d.Organizational statistics

e.Traditional statistics

6) A(n) _____ is a number or attribute computed for each member of a population or of a sample.

Select one:

a.statistic

b.data

c.measurement

d.estimator

e.parameter

7) A random sample of size 144 is taken from a population in which the proportion with the characteristic of interest is p = 0.56. Find .

Select one:

a.0.56

b.0.00

c.1.00

d.0.17

e.0.83

8) For a value x in a data set, if P percent of the values are less than or equal to x, then x is called the _____.

Select one:

a.Pth percentile

b.(P + 1)th percentile

c.(P - 1)th percentile

d.(P + 1)th quartile

e.(P - 1)th quartile

9) The _____ of a continuous random variable X is an assignment of probabilities to intervals of decimal numbers using a function f(x), called a density function.

Select one:

a.probability distribution

b.probability mass function

c.density

d.probability-generating function

e.joint mass function

10) Sample standard deviation is the square root of the _____.

Select one:

a.sample mean

b.population mean

c.sample variance

d.population variance

e.standard error

11) The goodness-of-fit c2 test is always:

Select one:

a.right-tailed, since deviation from the assumed probability distribution corresponds to small values of c2.

b.left-tailed, since deviation from the assumed probability distribution corresponds to large values of c2.

c.two-tailed, since deviation from the assumed probability distribution corresponds to large values of c2.

d.right-tailed, since deviation from the assumed probability distribution corresponds to large values of c2.

e.left-tailed, since deviation from the assumed probability distribution corresponds to small values of c2.

12) The parameter df2 in the F-distribution is often referred to as the:

Select one:

a.second degree of freedom.

b.numerator degree of freedom.

c.denominator degree of freedom.

d.first degree of freedom.

e.df2 degree of freedom.

13) _____ is the most frequently occurring value in a sample data set.

Select one:

a.Sample mean

b.Sample median

c.Sample variance

d.Sample mode

e.Sample standard deviation