1.

Which of the following is most likely a population as opposed to
a sample?

Answer

**4 points **

**Question 2**

1.

Which of the following can be reduced by proper interviewer
training

Answer

**4 points **

**Question 3**

1.

According to the empirical rule, if the data form a
"bell-shaped" normal distribution, ________ percent of the
observation will be contained within 1 (one) standard deviation around the
arithmetic mean.

Answer

**4 points **

**Question 4**

1.

The probability that a new advertising campaign will increase
sales is asssessed as being 0.80. The probabliity that the cost of
devolping the new add campaign can be kept within the original budget
allocation is 0.40. Assuming that the two events are independent, the
probability that the cost is kept withing budget and the campain will increase
sales is:

Answer

**4 points **

**Question 5**

1.

In a non symmmetrical distribution:

Answer

**4 points **

**Question 6**

1.

Which statement about the standard normal distribution is NOT
true

Answer

**4 points **

**Question 7**

1.

If we know that the length of time it takes a college student to
find a parking spot in the library parking lot follows a normal distribution
with a mean of 4.5 minutes and a standard deviation of 3.2 minute, find the
probability that a randomly selected college student will find a parking spot
in the library parking lot in less than 4 minutes.

Answer

**4 points **

**Question 8**

1.

The following data represent the response (Y for yes and N for
no) from a sample of 40 college students to the question SDo you currently own
shares in any stocks? (8 points)N N Y N N N N Y N Y N N Y N Y Y N N N YN Y N N
N N Y N N N Y N N N Y N N Y N NWhat is the standard error of the sample
proportion of college students who own stocks?

Answer

**4 points **

**Question 9**

1.

If an economist wishes to determine whether there is evidence
that average family income in a community exceeds $25,000

Answer

**4 points **

**Question 10**

1.

The* power* of a
statistical test is

Answer

**4 points **

**Question 11**

1.

If we are testing for the difference between the means of 2
related populations with samples of n1 = 20 and n2 = 20, the number of degrees
of freedom is equal to

Answer

**4 points **

**Question 12**

1.

The statictical distribution used for testing the difference
between two population variances is the ___ distribution.

Answer

**4 points **

**Question 13**

1.

a "robust" test procedure is one which

Answer

**4 points **

**Question 14**

1.

Why would you use the Tukey-Kramer procedure?

Answer

**4 points **

**Question 15**

1.

For a given level of significance, if the sample size is
increased, the power of the test will

Answer

**4 points **

**Question 16**

1.

The standard error of the sample proportion is the largest when
the sample proportion reaches

Answer

**4 points **

**Question 17**

1.

An economist is interested in studying the incomes of consumers
in a particular region. The population standard deviation is know to be
$1,000. A random sample of 50 individuals resulted in an average income
of $15,000. What sample size would the economist need to use if he
wants a 95% confidence interval no wider than plus or minus $100?

Answer

**4 points **

**Question 18**

1.

A 99% confidence intereval estimate can be interpreted to mean
that

Answer

**4 points **

**Question 19**

1.

The Y intercept (bo) represnts the

Answer

**4 points **

**Question 20**

1.

The slope (b1) represents

Answer

**4 points **

**Question 21**

1.

The least squares method minimizes which of the following?

Answer

**4 points **

**Question 22**

1.

In performing a regression analysis involving two numerical
variables, we are ssuming:

Answer

**4 points **

**Question 23**

1.

The strength of the linear relationship between to numerical
variables may be measured by the

Answer

**4 points **

**Question 24**

1.

In a multiple regression mode, the value of the coefficient of
multiple determination

Answer

**4 points **

**Question 25**

1.

When testing for independence in a contingency table with 3 rows
and 4 columns, there are ______ degrees of freedom.

Answer