Math STATS Milestone 2 Misc Exam
Solution Questions And Answers With
New Update 2022
You passed this Milestone
20 questions were answered correctly.
6 questions were answered
incorrectly. 1
The formula for the standard deviation of a sample is:
Select the true statement for the following data set that has a mean of
9: 3, 7, 8, 8, 8, 9, 10, 10, 13, 14
Answer choices are rounded to the hundredths place.
•
The variance is 8.50 and the standard deviation is 3.09.
•
The variance is 9.56 and the standard deviation is 3.09.
•
The variance is 9.56 and the standard deviation is 8.50.
•
The variance is 3.09 and the standard deviation is 9.56.
RATIONALE
We can first calculate the variance of the data, , by using the part of the formula under the
square root:
Next, we can find the standard deviation, , by simply taking the square root of the variance:
Math STATS Milestone 2 Misc Exam
Solution Questions And Answers With
New Update 2022
,Math STATS Milestone 2 Misc Exam
Solution Questions And Answers With
New Update 2022
We can also use the statistical functions in Excel to quickly find the variance and standard deviation.
CONCEPT
Standard Deviation
2
Jerry graded seven standardized tests with the following scores:
60, 74, 41, 87, 94, 79, 57
Which standardized test score represents the 50th percentile?
•
57
•
74
•
41
•
79
RATIONALE
The 50th percentile will be the median, or middle number. Make sure to first order the data.
The middle number is the 4th value, or 74.
CONCEPT
Percentiles
3
Mike's electronics store sold the following number of cellphones on each of the seven days of a week.
Math STATS Milestone 2 Misc Exam
Solution Questions And Answers With
New Update 2022
,Math STATS Milestone 2 Misc Exam
Solution Questions And Answers With
New Update 2022
Day Cell Phones Sold
Sunday 12
Math STATS Milestone 2 Misc Exam
Solution Questions And Answers With
New Update 2022
, Math STATS Milestone 2 Misc Exam
Solution Questions And Answers With
New Update 2022
Day Cell Phones Sold
Monday 10
Tuesday 9
Wednesday 5
Thursday 14
Friday 10
Saturday 10
The mean number of cell phones sold by the store for the week was .
•
5 phones
•
70 phones
•
10 phones
•
9 phones
RATIONALE
To get the mean, we use the formula: sum of values / n
The average, or mean, number of cell phones sold by the store for the week is 10 cell phones.
CONCEPT
Mean, Median, and Mode
4
Which of the following statements is true?
Math STATS Milestone 2 Misc Exam
Solution Questions And Answers With
New Update 2022
Solution Questions And Answers With
New Update 2022
You passed this Milestone
20 questions were answered correctly.
6 questions were answered
incorrectly. 1
The formula for the standard deviation of a sample is:
Select the true statement for the following data set that has a mean of
9: 3, 7, 8, 8, 8, 9, 10, 10, 13, 14
Answer choices are rounded to the hundredths place.
•
The variance is 8.50 and the standard deviation is 3.09.
•
The variance is 9.56 and the standard deviation is 3.09.
•
The variance is 9.56 and the standard deviation is 8.50.
•
The variance is 3.09 and the standard deviation is 9.56.
RATIONALE
We can first calculate the variance of the data, , by using the part of the formula under the
square root:
Next, we can find the standard deviation, , by simply taking the square root of the variance:
Math STATS Milestone 2 Misc Exam
Solution Questions And Answers With
New Update 2022
,Math STATS Milestone 2 Misc Exam
Solution Questions And Answers With
New Update 2022
We can also use the statistical functions in Excel to quickly find the variance and standard deviation.
CONCEPT
Standard Deviation
2
Jerry graded seven standardized tests with the following scores:
60, 74, 41, 87, 94, 79, 57
Which standardized test score represents the 50th percentile?
•
57
•
74
•
41
•
79
RATIONALE
The 50th percentile will be the median, or middle number. Make sure to first order the data.
The middle number is the 4th value, or 74.
CONCEPT
Percentiles
3
Mike's electronics store sold the following number of cellphones on each of the seven days of a week.
Math STATS Milestone 2 Misc Exam
Solution Questions And Answers With
New Update 2022
,Math STATS Milestone 2 Misc Exam
Solution Questions And Answers With
New Update 2022
Day Cell Phones Sold
Sunday 12
Math STATS Milestone 2 Misc Exam
Solution Questions And Answers With
New Update 2022
, Math STATS Milestone 2 Misc Exam
Solution Questions And Answers With
New Update 2022
Day Cell Phones Sold
Monday 10
Tuesday 9
Wednesday 5
Thursday 14
Friday 10
Saturday 10
The mean number of cell phones sold by the store for the week was .
•
5 phones
•
70 phones
•
10 phones
•
9 phones
RATIONALE
To get the mean, we use the formula: sum of values / n
The average, or mean, number of cell phones sold by the store for the week is 10 cell phones.
CONCEPT
Mean, Median, and Mode
4
Which of the following statements is true?
Math STATS Milestone 2 Misc Exam
Solution Questions And Answers With
New Update 2022
