BUSINESS STATISTICS EVALUATION EXAM TEST
QUESTIONS AND ANSWERS SURE A+
✔✔+/-2.576 - ✔✔Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m.
newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers,
36% indicated that they watch the late evening news on this local CBS station. What is
the critical value if ? equal 0.01?
✔✔22.5 - ✔✔The contingency table for a sample of corporate executives classified by
educational level and the social activity follows. What does the expected frequency for
the above average social activity and high school education equal?
✔✔We cannot determine if the 2% is a significant difference. - ✔✔An electronics retailer
believes that, at most, 40% of their cell phone inventory was sold during November. The
retailer surveyed 80 dealers and found that 38% of the inventory was sold. Since 38% is
less than 40%, is this difference of 2 percentage points sampling error or a significant
difference? Test at the 0.05 level. The computed z equal -0.37.
✔✔0.36 - ✔✔Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m.
newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers,
36% indicated that they watch the late evening news on this local CBS station. What is
the sample proportion?
✔✔True - ✔✔There is not one, but a family of chi-square distributions. There is a chi-
square distribution for 1 degree of freedom, another for 2 degrees of freedom, another
for 3 degrees of freedom, and so on.
✔✔That there is no preference between the colors - ✔✔Three new colors have been
proposed for the Jeep Grand Cherokee vehicle. They are silvered-blue, almond, and
willow green. The null hypothesis for a goodness-of-fit test would be _______________.
✔✔3.9 - ✔✔A survey of property owners opinions about a street-widening project was
taken to determine if owners opinions were related to the distance between their home
and the street. A randomly selected sample of 100 property owners was contacted and
the results are shown next. What is the expected frequency for people against the
project and who have over 120 feet of property foot-frontage?
✔✔Squared - ✔✔The computed chi-square value is positive because the difference
between the observed and expected frequencies is _____________.
✔✔A z-statistic - ✔✔A sample of 250 adults tried the new multigrain cereal Wow! A total
of 187 rated it as excellent. In a sample of 100 children, 66 rated it as excellent. Using
the 0.1 significance level, the researcher wishes to show that adults like the cereal
better than children. What test statistic should we use to compare the ratings of adults
and children?
, ✔✔11.07 - ✔✔A personnel manager is concerned about absenteeism. She decides to
sample employee records to determine if absenteeism is distributed evenly throughout
the six-day workweek. The null hypothesis is: Absenteeism is distributed evenly
throughout the week. The 0.01 level is to be used. The sample results are shown. What
is the critical value of chi-square with ? equal 0.05?
✔✔4 - ✔✔A survey of property owners opinions about a street-widening project was
taken to determine if owners opinions were related to the distance between their home
and the street. A randomly selected sample of 100 property owners was contacted and
the results are shown. How many degrees of freedom are there?
✔✔Do not reject the null hypothesis. - ✔✔Suppose we test H0: the population
proportion1 equal the population proportion2 at the 0.05 level of significance. If the z-
test statistic is -1.07, what is our decision?
✔✔Do not reject it. - ✔✔To test the hypothesis that 55% of those families who plan to
purchase a vacation residence in Florida want a condominium, the null hypothesis is the
population proportion equal 0.55 and the alternate is the population proportion not equal
.55. A random sample of 400 families who planned to buy a vacation residence
revealed that 228 families want a condominium. What decision should be made
regarding the null hypothesis using the 0.01 level of significance?
✔✔The shape of the distribution is based on the degrees of freedom. - ✔✔Which of the
following statements is correct regarding the chi-square distribution?
✔✔4 - ✔✔A question has these possible responses: excellent, very good, good, fair,
and unsatisfactory. What are the degrees of freedom for a goodness-of-fit test to test
the hypothesis that responses are uniformly distributed?
✔✔Chi-square statistic - ✔✔A recent study of the relationship between social activity
and education for a sample of corporate executives showed the following results. The
appropriate test statistic for the analysis is a(n) __________.
✔✔H0: the population proportion1 equal the population proportion2 - ✔✔In a market
test of a new chocolate raspberry coffee, a poll of 400 people from Dobbs Ferry showed
250 preferred the new coffee. In Irvington, 170 out of 350 people preferred the new
coffee. To test the hypothesis that there is no difference in preferences between the two
villages, what is the null hypothesis?
✔✔11.07 - ✔✔What is the critical value at the 0.05 level of significance for a goodness-
of-fit test if there are six categories?
✔✔150 - ✔✔Students were sampled in order to determine their support for the
legalization of gambling in their community. A sample of 150 students were asked
QUESTIONS AND ANSWERS SURE A+
✔✔+/-2.576 - ✔✔Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m.
newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers,
36% indicated that they watch the late evening news on this local CBS station. What is
the critical value if ? equal 0.01?
✔✔22.5 - ✔✔The contingency table for a sample of corporate executives classified by
educational level and the social activity follows. What does the expected frequency for
the above average social activity and high school education equal?
✔✔We cannot determine if the 2% is a significant difference. - ✔✔An electronics retailer
believes that, at most, 40% of their cell phone inventory was sold during November. The
retailer surveyed 80 dealers and found that 38% of the inventory was sold. Since 38% is
less than 40%, is this difference of 2 percentage points sampling error or a significant
difference? Test at the 0.05 level. The computed z equal -0.37.
✔✔0.36 - ✔✔Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m.
newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers,
36% indicated that they watch the late evening news on this local CBS station. What is
the sample proportion?
✔✔True - ✔✔There is not one, but a family of chi-square distributions. There is a chi-
square distribution for 1 degree of freedom, another for 2 degrees of freedom, another
for 3 degrees of freedom, and so on.
✔✔That there is no preference between the colors - ✔✔Three new colors have been
proposed for the Jeep Grand Cherokee vehicle. They are silvered-blue, almond, and
willow green. The null hypothesis for a goodness-of-fit test would be _______________.
✔✔3.9 - ✔✔A survey of property owners opinions about a street-widening project was
taken to determine if owners opinions were related to the distance between their home
and the street. A randomly selected sample of 100 property owners was contacted and
the results are shown next. What is the expected frequency for people against the
project and who have over 120 feet of property foot-frontage?
✔✔Squared - ✔✔The computed chi-square value is positive because the difference
between the observed and expected frequencies is _____________.
✔✔A z-statistic - ✔✔A sample of 250 adults tried the new multigrain cereal Wow! A total
of 187 rated it as excellent. In a sample of 100 children, 66 rated it as excellent. Using
the 0.1 significance level, the researcher wishes to show that adults like the cereal
better than children. What test statistic should we use to compare the ratings of adults
and children?
, ✔✔11.07 - ✔✔A personnel manager is concerned about absenteeism. She decides to
sample employee records to determine if absenteeism is distributed evenly throughout
the six-day workweek. The null hypothesis is: Absenteeism is distributed evenly
throughout the week. The 0.01 level is to be used. The sample results are shown. What
is the critical value of chi-square with ? equal 0.05?
✔✔4 - ✔✔A survey of property owners opinions about a street-widening project was
taken to determine if owners opinions were related to the distance between their home
and the street. A randomly selected sample of 100 property owners was contacted and
the results are shown. How many degrees of freedom are there?
✔✔Do not reject the null hypothesis. - ✔✔Suppose we test H0: the population
proportion1 equal the population proportion2 at the 0.05 level of significance. If the z-
test statistic is -1.07, what is our decision?
✔✔Do not reject it. - ✔✔To test the hypothesis that 55% of those families who plan to
purchase a vacation residence in Florida want a condominium, the null hypothesis is the
population proportion equal 0.55 and the alternate is the population proportion not equal
.55. A random sample of 400 families who planned to buy a vacation residence
revealed that 228 families want a condominium. What decision should be made
regarding the null hypothesis using the 0.01 level of significance?
✔✔The shape of the distribution is based on the degrees of freedom. - ✔✔Which of the
following statements is correct regarding the chi-square distribution?
✔✔4 - ✔✔A question has these possible responses: excellent, very good, good, fair,
and unsatisfactory. What are the degrees of freedom for a goodness-of-fit test to test
the hypothesis that responses are uniformly distributed?
✔✔Chi-square statistic - ✔✔A recent study of the relationship between social activity
and education for a sample of corporate executives showed the following results. The
appropriate test statistic for the analysis is a(n) __________.
✔✔H0: the population proportion1 equal the population proportion2 - ✔✔In a market
test of a new chocolate raspberry coffee, a poll of 400 people from Dobbs Ferry showed
250 preferred the new coffee. In Irvington, 170 out of 350 people preferred the new
coffee. To test the hypothesis that there is no difference in preferences between the two
villages, what is the null hypothesis?
✔✔11.07 - ✔✔What is the critical value at the 0.05 level of significance for a goodness-
of-fit test if there are six categories?
✔✔150 - ✔✔Students were sampled in order to determine their support for the
legalization of gambling in their community. A sample of 150 students were asked
