Economic and
Business Statistics
LATEST 2025 WITH
QUESTIONS AND
CORRECT
VERIFIED
CORRECT
ANSWERS GRADED
A+ GUARANTEED
100% PASS
,A university professor wanted to know if the
attitudes towards statistics changed during the
course of the semester. She took a simple
random sample of students and gave them a
test at the beginning of the term to assess their
feelings toward statistics. When the semester
was finished, she administered another test to
the same group of students and wanted to see
if there was a difference between the average
attitudes toward statistics. Does this study have
a matched pairs design? - ANSWER-Yes
True or False: An analysis of two rival airports
was completed. The number of flights with a full
passenger list are recorded below. The
difference in proportions is statistically
significant, based on a 95% confidence level. -
ANSWER-True
True or False: Bill is doing a study comparing
two groups with 99% confidence level and a 0.2
margin of error or less. He told his assistant that
,a sample size of 95 is the minimum needed for
each group. - ANSWER-False
A randomized, double blind clinical study was
conducted on adults aged 50 to 59 to test the
effectiveness of a new vaccine for shingles
(skin blisters caused by a virus). Approximately,
half of the participants were randomly assigned
to the vaccine group and the rest to the placebo
group. Participants were monitored for at least
a year after receiving either the vaccine or the
placebo for occurrence of shingles. The
following table summarizes these data: What
proportion of those in the vaccine group got
shingles? Please give your answer to 4 decimal
places. (X.XXXX) - ANSWER-.0027
In a survey of college students at a large
university, students were asked their gender
and whether they liked country music. Of the
189 females, 68.3% like country music. Of the
155 males, 45.8% like country. True or false: A
90% confidence interval for the difference in the
proportion of the female students who like
country and the proportion of the male students
, like country music is (0.139, 0.311). (Use SE =
.0524, and carry 3 decimal places.) - ANSWER-
True
True or False: The supervisor of a fish hatchery
needs to measure the length of a particular
species every week to track their growth and
verify that they maintain the mean length for
that species for their age. She randomly selects
100 fish and measures their individual lengths
in inches. The supervisor will not be able to
conduct inference about the mean length this
week because the data include two outliers. -
ANSWER-False
Which distribution has greater spread? -
ANSWER-t
True or False: The critical value for a 90%
confidence interval when there are n = 10
observations is 1.812 - ANSWER-False
True or False: A tire manufacturer claims that
one particular type of tire will last at least
50,000 miles. A group of angry customers do
Business Statistics
LATEST 2025 WITH
QUESTIONS AND
CORRECT
VERIFIED
CORRECT
ANSWERS GRADED
A+ GUARANTEED
100% PASS
,A university professor wanted to know if the
attitudes towards statistics changed during the
course of the semester. She took a simple
random sample of students and gave them a
test at the beginning of the term to assess their
feelings toward statistics. When the semester
was finished, she administered another test to
the same group of students and wanted to see
if there was a difference between the average
attitudes toward statistics. Does this study have
a matched pairs design? - ANSWER-Yes
True or False: An analysis of two rival airports
was completed. The number of flights with a full
passenger list are recorded below. The
difference in proportions is statistically
significant, based on a 95% confidence level. -
ANSWER-True
True or False: Bill is doing a study comparing
two groups with 99% confidence level and a 0.2
margin of error or less. He told his assistant that
,a sample size of 95 is the minimum needed for
each group. - ANSWER-False
A randomized, double blind clinical study was
conducted on adults aged 50 to 59 to test the
effectiveness of a new vaccine for shingles
(skin blisters caused by a virus). Approximately,
half of the participants were randomly assigned
to the vaccine group and the rest to the placebo
group. Participants were monitored for at least
a year after receiving either the vaccine or the
placebo for occurrence of shingles. The
following table summarizes these data: What
proportion of those in the vaccine group got
shingles? Please give your answer to 4 decimal
places. (X.XXXX) - ANSWER-.0027
In a survey of college students at a large
university, students were asked their gender
and whether they liked country music. Of the
189 females, 68.3% like country music. Of the
155 males, 45.8% like country. True or false: A
90% confidence interval for the difference in the
proportion of the female students who like
country and the proportion of the male students
, like country music is (0.139, 0.311). (Use SE =
.0524, and carry 3 decimal places.) - ANSWER-
True
True or False: The supervisor of a fish hatchery
needs to measure the length of a particular
species every week to track their growth and
verify that they maintain the mean length for
that species for their age. She randomly selects
100 fish and measures their individual lengths
in inches. The supervisor will not be able to
conduct inference about the mean length this
week because the data include two outliers. -
ANSWER-False
Which distribution has greater spread? -
ANSWER-t
True or False: The critical value for a 90%
confidence interval when there are n = 10
observations is 1.812 - ANSWER-False
True or False: A tire manufacturer claims that
one particular type of tire will last at least
50,000 miles. A group of angry customers do
