Statistics Milestone 5 Exam / Questions with
Certified Solutions.
Edwin conducted a survey to find the percentage of people in an area who
smoked regularly. He defined the label "smoking regularly" for males smoking 30
or more cigarettes in a day and for females smoking 20 or more. Out of 635
persons who took part in the survey, 71 are labeled as people who smoke
regularly.
What is the standard error for the sample proportion? Answer choices are
rounded to the thousandths place. - Answer: 0.013
The data below shows the grams of fat for a variety of snacks. Morris wants to
calculate the standard error of the sample mean for this set of data.
Page 1 of 7
, SnackGrams of FatSnack 19Snack 213Snack 321Snack 430Snack 531Snack
631Snack 734Snack 825Snack 928Snack 1020
What is the standard error for this set of data? - Answer: 2.63
The government claims that the average age of Californians is 34 years. Joe
hypothesizes that the average age of the population of California is not equal to
34 years. He records a sample mean equal to 37 and states the hypothesis as μ =
34 vs μ ≠ 34.
What type of test should Joe do? - Answer: Two-tailed test
Henri has calculated a z-test statistic of -2.73.
What is the p-value for this left-tailed test? Answer choices are rounded to the
thousandths place. - Answer: 0.003
Brad recorded the number of visitors at the local science museum during the
week:
DayVisitorsTuesday18Wednesday24Thursday28Friday30
He expected to see 25 visitors each day. To answer whether the number of visitors
follows a uniform distribution, a chi-square test for goodness of fit should be
performed. (alpha = 0.10)
What is the chi-squared test statistic? Answers are rounded to the nearest
hundredth. - Answer: 3.36
Page 2 of 7
Certified Solutions.
Edwin conducted a survey to find the percentage of people in an area who
smoked regularly. He defined the label "smoking regularly" for males smoking 30
or more cigarettes in a day and for females smoking 20 or more. Out of 635
persons who took part in the survey, 71 are labeled as people who smoke
regularly.
What is the standard error for the sample proportion? Answer choices are
rounded to the thousandths place. - Answer: 0.013
The data below shows the grams of fat for a variety of snacks. Morris wants to
calculate the standard error of the sample mean for this set of data.
Page 1 of 7
, SnackGrams of FatSnack 19Snack 213Snack 321Snack 430Snack 531Snack
631Snack 734Snack 825Snack 928Snack 1020
What is the standard error for this set of data? - Answer: 2.63
The government claims that the average age of Californians is 34 years. Joe
hypothesizes that the average age of the population of California is not equal to
34 years. He records a sample mean equal to 37 and states the hypothesis as μ =
34 vs μ ≠ 34.
What type of test should Joe do? - Answer: Two-tailed test
Henri has calculated a z-test statistic of -2.73.
What is the p-value for this left-tailed test? Answer choices are rounded to the
thousandths place. - Answer: 0.003
Brad recorded the number of visitors at the local science museum during the
week:
DayVisitorsTuesday18Wednesday24Thursday28Friday30
He expected to see 25 visitors each day. To answer whether the number of visitors
follows a uniform distribution, a chi-square test for goodness of fit should be
performed. (alpha = 0.10)
What is the chi-squared test statistic? Answers are rounded to the nearest
hundredth. - Answer: 3.36
Page 2 of 7
