1. No category

ID: ____________________
Serial:________
Quiz#1
Stat212-082
Sec # 03 04 06
Name________________________
Choose the one alternative that best completes the statement or answers the question.
1) (1 pt.) How many tissues should a package of tissues contain?
1) _______
Researchers have determined that a person uses an average of 62
tissues during a cold. Suppose a random sample of 2500 people yielded
the following data on the number of tissues used during a cold: = 57, s
= 18. Identify the null and alternative hypothesis for a test to determine
if the mean number of tissues used during a cold is less than 62.
A)
B)
: μ = 62 vs.
: μ < 62
: μ = 62 vs.
: μ > 62
C)
D)
: μ > 62 vs.
: μ ≤ 62
: μ = 62 vs.
: μ ≠ 62
2)
3)
(1 pt.) Suppose we wish to test
: μ ≤ 35 vs.
: μ > 35. What will
result if we conclude that the mean is greater than 35 when its true
value is really 43?
A) a correct decision
B) a Type I error
C) a Type II error
D) none of the above
(1 pt.) I want to test
: p = 0.5 vs.
: p ≠ 0.5 using a test of hypothesis.
If I concluded that p is 0.5 when, in fact, the true value of p is not 0.5,
then I have made a __________.
A) Type I error
B) Type II error
C) Type I and Type II error
D) correct decision
4) (1 pt.) How many tissues should a package of tissues contain?
Researchers have determined that a person uses an average of 48 tissues
during a cold. Suppose a random sample of 100 people yielded the
2) _______
3) _______
4) _______
following data on the number of tissues used during a cold:
Using the sample information provided, calculate the value of the
test statistic for the relevant hypothesis test.
A)
B)
z=
z=
C)
D)
z=
z=
5) (1 pt.) How many tissues should a package of tissues contain?
Researchers have determined that a person uses an average of 45 tissues
during a cold. Suppose a random sample of 10,000 people yielded the
following data on the number of tissues used during a cold:
We want to test the alternative hypothesis
correct rejection region for
A)
if z < -1.645.
Reject
B)
if z > 1.96 or z < -1.96.
Reject
C)
if z > 1.645.
Reject
D)
if z < -1.96.
Reject
: μ < 45. State the
5) _______
6) (5 pts) Data were collected from the sale of 25 properties by a local real
estate agent. The following printout concentrated on the land value
variable from the sampled properties.
HYPOTHESIS:
: μ = $40,253 vs.
: μ ≠ $40,253
(2 pts.) Find the p-value for testing whether the mean land value differs
from $40,253.
A) p = 0.1918585
B) p = 0.0959288
C) p = 0.308142
D) p = 0.808142
6) _______