unit 6 math post test updated 2025
Drag the values to the correct locations on the image. Not all values will be used.
Susan is conducting a survey about the electric bills of households in her city. From the
electric company, she found that the population mean is $98.75 with a standard
deviation of $10.45. Susan has a sample size of 60.
Complete the equation that Susan can use to find the interval in which she can be 68%
sure that the sample mean will lie. - ANSWER-98.75 ± 10.45/ √60
good luck lol - ANSWER-i got an 88%
i got the color preference wheel wrong because i didn't pick all the answers.
Select all the correct answers.
The manufacturer of a popular brand of markers is planning to release a new color. To
determine which color to add, it mailed out surveys to 5,000 of its customers regarding
the general color family they prefer. The returned results are shown in this pie chart.
Based on the results, one member of the management team says they should choose
the new color from the blue family of colors since a majority of people prefer those
colors.
Another member doesn't agree and thinks they should do more research. Which
statements would support her request? - ANSWER-2. Not all color families were
represented in the survey, which could cause a nonresponse bias.
4. The mail-in survey may have resulted in an undercoverage bias.
i got this one wrong, Select the correct answer.
A researcher for a travel company is looking into the prices people are willing to pay for
airplane tickets. The company has communicated that the overall population mean is
$265 with a standard deviation of $40.93. The researcher has a sample of 130 ticket
purchases from one location. By the central limit theorem, which interval can the
researcher be 95% certain that the sample mean will fall within? - ANSWER-I GOT
THIS WRONG.
B.
$264.37 and $265.63 ITS DEFINITELY NOT B
Select ALL the correct answers.
Two friends worked together on an entry for a poetry contest and won; however, there is
only one prize and it cannot be split. Some methods of determining who receives the
prize are given below.
Select all the fair methods for determining who receives the prize. - ANSWER-1. roll a
die and evaluate the outcome as either even or odd
2. ask a stranger to flip a coin
3. place both names in equal amounts into a hat and draw one without looking
Select the correct answer from each drop-down menu.
, A veterinarian's office recorded one particular week that they had 50 patients. The table
shows the recorded number of dogs.
Monday Tuesday Wednesday Thursday Friday 74552
Use the given data to complete the sample proportion and confidence intervals for this
situation.
Percentage of patients that were dogs-------
90% confidence interval------
95% confidence interval------ - ANSWER-i got this one partially wrong
dogs--46%
90% confidence ----- 34%, 58%
i got this one wrong for 95% it is not 34%, 60%
Select the correct answer from each drop-down menu.
Marjory works at a commercial bakery. She is conducting an experiment to test the
results of two yeast activators for making bread. The Rapid Prove activator claims to
increase the rise of dough by at least 30%. The Quick Rise activator claims to increase
the rise of dough by at least 26%.
Marjory and her team bake 60 loaves of bread, 30 using the Rapid Prove activator and
30 using the Quick Rise activator.
After the loaves were baked, Marjory evaluated the rise of the breads as compared to
previous doughs with no activator used. She reported that, on average, the rise of those
made with the Rapid Prove activator increased by 25% and the rise of loaves made with
the Quick Rise activator increased by 28%.
The Rapid Prove activator claim is--------
The Quick Rise activator claim is------
The------activator is more effective because the increase in rise was------ that -
ANSWER-false
true
quick rise
greater than
Select the correct answer from the drop-down menu.
The number of books borrowed from a library each week follows a normal distribution.
When a sample is taken for several weeks, the mean is found to be 190 and the
standard deviation is 30.
There is a _______ chance that more than 250 books were borrowed in a week. -
ANSWER-2.5
Select the correct answer.
A large corporation sent out four groups of people to conduct observational studies on
the average wait time at four different restaurants in its restaurant group. The
restaurants have approximately the same ratings in terms of quality and popularity.
Drag the values to the correct locations on the image. Not all values will be used.
Susan is conducting a survey about the electric bills of households in her city. From the
electric company, she found that the population mean is $98.75 with a standard
deviation of $10.45. Susan has a sample size of 60.
Complete the equation that Susan can use to find the interval in which she can be 68%
sure that the sample mean will lie. - ANSWER-98.75 ± 10.45/ √60
good luck lol - ANSWER-i got an 88%
i got the color preference wheel wrong because i didn't pick all the answers.
Select all the correct answers.
The manufacturer of a popular brand of markers is planning to release a new color. To
determine which color to add, it mailed out surveys to 5,000 of its customers regarding
the general color family they prefer. The returned results are shown in this pie chart.
Based on the results, one member of the management team says they should choose
the new color from the blue family of colors since a majority of people prefer those
colors.
Another member doesn't agree and thinks they should do more research. Which
statements would support her request? - ANSWER-2. Not all color families were
represented in the survey, which could cause a nonresponse bias.
4. The mail-in survey may have resulted in an undercoverage bias.
i got this one wrong, Select the correct answer.
A researcher for a travel company is looking into the prices people are willing to pay for
airplane tickets. The company has communicated that the overall population mean is
$265 with a standard deviation of $40.93. The researcher has a sample of 130 ticket
purchases from one location. By the central limit theorem, which interval can the
researcher be 95% certain that the sample mean will fall within? - ANSWER-I GOT
THIS WRONG.
B.
$264.37 and $265.63 ITS DEFINITELY NOT B
Select ALL the correct answers.
Two friends worked together on an entry for a poetry contest and won; however, there is
only one prize and it cannot be split. Some methods of determining who receives the
prize are given below.
Select all the fair methods for determining who receives the prize. - ANSWER-1. roll a
die and evaluate the outcome as either even or odd
2. ask a stranger to flip a coin
3. place both names in equal amounts into a hat and draw one without looking
Select the correct answer from each drop-down menu.
, A veterinarian's office recorded one particular week that they had 50 patients. The table
shows the recorded number of dogs.
Monday Tuesday Wednesday Thursday Friday 74552
Use the given data to complete the sample proportion and confidence intervals for this
situation.
Percentage of patients that were dogs-------
90% confidence interval------
95% confidence interval------ - ANSWER-i got this one partially wrong
dogs--46%
90% confidence ----- 34%, 58%
i got this one wrong for 95% it is not 34%, 60%
Select the correct answer from each drop-down menu.
Marjory works at a commercial bakery. She is conducting an experiment to test the
results of two yeast activators for making bread. The Rapid Prove activator claims to
increase the rise of dough by at least 30%. The Quick Rise activator claims to increase
the rise of dough by at least 26%.
Marjory and her team bake 60 loaves of bread, 30 using the Rapid Prove activator and
30 using the Quick Rise activator.
After the loaves were baked, Marjory evaluated the rise of the breads as compared to
previous doughs with no activator used. She reported that, on average, the rise of those
made with the Rapid Prove activator increased by 25% and the rise of loaves made with
the Quick Rise activator increased by 28%.
The Rapid Prove activator claim is--------
The Quick Rise activator claim is------
The------activator is more effective because the increase in rise was------ that -
ANSWER-false
true
quick rise
greater than
Select the correct answer from the drop-down menu.
The number of books borrowed from a library each week follows a normal distribution.
When a sample is taken for several weeks, the mean is found to be 190 and the
standard deviation is 30.
There is a _______ chance that more than 250 books were borrowed in a week. -
ANSWER-2.5
Select the correct answer.
A large corporation sent out four groups of people to conduct observational studies on
the average wait time at four different restaurants in its restaurant group. The
restaurants have approximately the same ratings in terms of quality and popularity.
