QMB 3200 EXAM 2 FSU BLISS
QUESTIONS AND ANSWERS
Suppose the average driving distance for last year's Masters Golf Tournament was
282.5 yards with a standard deviation of 12.2 yards. A random sample of 30 drives was
selected from a total of 4,144 drives that were hit during this tournament. What is the
probability that the sample average was 279 yards or less?
0.0574
0.2676
0.1611
0.0581 - Correct Answers -.0581
Recently, FHA mortgages, which are insured by the federal government, accounted for
28% of all home-purchase mortgages that were approved. A random sample of 150
mortgage applications was selected. What is the probability that 48 or more from this
sample were insured by the FHA?
0.1376
0.1915
0.2291
0.3974 - Correct Answers -.1376
A key metric in the cell phone industry is average revenue per user (ARPU) which
represents the average dollar amount that a customer spends per store visit. Recently,
AT&T reported their ARPU was $67.81. Suppose the standard deviation for this
population is $18.45. What is the probability that the ARPU will be between $62 and $66
from a random sample of 35 customers?
0.3553
0.2496
0.4470
0.5619 - Correct Answers -.2496
The sample means for a population that follows the normal distribution will also be
normally distributed, regardless of the size of the samples. - Correct Answers -true
Photo Bomb is an online company that sells packaging materials for photographers.
Suppose their average order size is $208.19 with a standard deviation of $53.44. A
random sample of 35 customer orders has been selected. The standard error of the
mean for this sample is ________.
$5.11
, $7.30
$9.03
$11.35 - Correct Answers -9.03
An Epson inkjet printer ad advertises that the black ink cartridge will provide enough ink
for an average of 245 pages. Assume that this claim is accurate and that the standard
deviation for this population is 15 pages. A random sample of 33 customers was
surveyed about the number of pages they were able to print with their black ink
cartridges. What the probability that the sample mean will be 246 pages or more?
0.6491
0.8729
0.3509
0.1093 - Correct Answers -.3509
The Central Limit Theorem requires
a sample size of at least 30 be used to ensure that the samples means are normally
distributed.
the population be normally distributed to ensure that the samples means are normally
distributed.
the bootstrap method to be used to select the sample.
the resampling technique to be used to select the sample. - Correct Answers -a sample
size of at least 30 be used to ensure that the samples means are normally distributed.
As the size of the sample increases, the ________________________________.
standard error of the mean becomes smaller
population standard deviation increases
sampling error increases
shape of the sampling distribution becomes wider - Correct Answers -standard error of
the mean becomes smaller
A ________ sample is a sample in which each member of the population has a known,
nonzero, chance of being selected for the sample.
systematic
simple random
probability
convenience - Correct Answers -probability
The Central Limit Theorem (CLT) states that the sample means
of any samples will be normally distributed regardless of the shape of their population
distributions.
of large-sized samples will be uniformly distributed regardless of the shape of their
population distributions.
of large-sized samples will be normally distributed regardless of the shape of their
population distributions.
QUESTIONS AND ANSWERS
Suppose the average driving distance for last year's Masters Golf Tournament was
282.5 yards with a standard deviation of 12.2 yards. A random sample of 30 drives was
selected from a total of 4,144 drives that were hit during this tournament. What is the
probability that the sample average was 279 yards or less?
0.0574
0.2676
0.1611
0.0581 - Correct Answers -.0581
Recently, FHA mortgages, which are insured by the federal government, accounted for
28% of all home-purchase mortgages that were approved. A random sample of 150
mortgage applications was selected. What is the probability that 48 or more from this
sample were insured by the FHA?
0.1376
0.1915
0.2291
0.3974 - Correct Answers -.1376
A key metric in the cell phone industry is average revenue per user (ARPU) which
represents the average dollar amount that a customer spends per store visit. Recently,
AT&T reported their ARPU was $67.81. Suppose the standard deviation for this
population is $18.45. What is the probability that the ARPU will be between $62 and $66
from a random sample of 35 customers?
0.3553
0.2496
0.4470
0.5619 - Correct Answers -.2496
The sample means for a population that follows the normal distribution will also be
normally distributed, regardless of the size of the samples. - Correct Answers -true
Photo Bomb is an online company that sells packaging materials for photographers.
Suppose their average order size is $208.19 with a standard deviation of $53.44. A
random sample of 35 customer orders has been selected. The standard error of the
mean for this sample is ________.
$5.11
, $7.30
$9.03
$11.35 - Correct Answers -9.03
An Epson inkjet printer ad advertises that the black ink cartridge will provide enough ink
for an average of 245 pages. Assume that this claim is accurate and that the standard
deviation for this population is 15 pages. A random sample of 33 customers was
surveyed about the number of pages they were able to print with their black ink
cartridges. What the probability that the sample mean will be 246 pages or more?
0.6491
0.8729
0.3509
0.1093 - Correct Answers -.3509
The Central Limit Theorem requires
a sample size of at least 30 be used to ensure that the samples means are normally
distributed.
the population be normally distributed to ensure that the samples means are normally
distributed.
the bootstrap method to be used to select the sample.
the resampling technique to be used to select the sample. - Correct Answers -a sample
size of at least 30 be used to ensure that the samples means are normally distributed.
As the size of the sample increases, the ________________________________.
standard error of the mean becomes smaller
population standard deviation increases
sampling error increases
shape of the sampling distribution becomes wider - Correct Answers -standard error of
the mean becomes smaller
A ________ sample is a sample in which each member of the population has a known,
nonzero, chance of being selected for the sample.
systematic
simple random
probability
convenience - Correct Answers -probability
The Central Limit Theorem (CLT) states that the sample means
of any samples will be normally distributed regardless of the shape of their population
distributions.
of large-sized samples will be uniformly distributed regardless of the shape of their
population distributions.
of large-sized samples will be normally distributed regardless of the shape of their
population distributions.
