Question

**Q1: A student has gotten the following grades on his
tests: 82, 90, 66, and 83. He wants an 83 or better overall. What
is the minimum grade he must get on the last test in order to
achieve that average?**

..

**Q2: A distribution of 6 scores has a median of 24. If
the highest score**

** Increases 3
points, the median will become ___________.**

21

21.5

24

cannot be determined without additional information.

none of these

..

**Q3: compute the mean of the following data:**

X Freq.

----------------

0 4

1 3

2 1

3 0

4 1

.

.

**Q4: The standard deviation of a group of scores is 10.
If 5 were subtracted from each score, the standard deviation of the
new scores would be**

a. 2

b. 10/25

c. 5

d. None of these.

.

**Q5: The variance of the following sample of five
numbers**

** 3, 3,3,3,3
is:**

0

3

9

11.25

Answer #1

Q1) Solution: **the minimum grade he must get on the last
test in order to achieve that average is 94**

**Consider x and use average formula here,**

=> x=94

Q2) Solution: Option c) is correct.

**A distribution of 6 scores has a median of 24. If the
highest score**

** Increases 3
points, the median will become 24**

**Median is not affected by increasing largest number in
given scores.**

**Q3) Solution:**

X | F | X*F |

0 | 4 | 0 |

1 | 3 | 3 |

2 | 1 | 2 |

3 | 0 | 0 |

4 | 1 | 4 |

Total | 9 | 9 |

Mean

=9/9

=1

Q4) Solution: d. None of these.

Standard deviation is 10.

It is not affected by subtracting 5 from each score.

Q5) Solution: Option A) is correct. 0

Variance of constant is always 0

Q1 )Find the 1st quartile, 2nd quartile, third quartile and the
interquartile range of the following data set
72, 74, 75, 77, 79, 82, 83, 87, 88, 90, 91, 91, 91, 92, 96, 97,
97, 98, 100
The 1st Quartile :
The 2nd Quartile :
The 3rd Quartile :
The IQR :
Q2)
According to the empirical rule, if a population has a normal
distribution, approximately what percentage of values is within
one, two and three standard deviation of the...

A statistics student made the following grades on the first 6
tests: 76, 82, 92, 95, 92, 86. The total number of tests for the
semester is 7. If the median score for the whole semester was 92,
what could not have been the score of the last test?
a. 77
b.92
c.93
d. 94
e.96
A commuter travels many miles to work each morning. She has
timed this trip 5 times during the last month. The time (in
minutes)...

In a sample of 18 students at East High School the following
number of days of absences were recorded for the previous semester:
4, 3, 1, 0, 4, 2, 3, 0, 1, 2, 3, 0, 4, 1, 1, 5, 1, 1. Manually
compute the mean, median, and range of this sample. Show work.
(Round values to one decimal place)
10) The following data represent the bachelor degrees of some
CEO's who work in the NYC area. Degree Number Accounting 19...

A student has the following assignment grades: 85, 92, 72, 69,
74, 96, 83, 76, 72, 97. Find the mean, mode, and the five-number
summary. Round to one decimal
Find the mean and the standard deviation of the following quiz
scores:
21, 20, 23, 15, 16. Round to one decimal.
15,000 students take a national test. The results are normally
distributed with a mean of 400 and a standard deviation of 120.
Approximately how many students scored between 400 and...

For the following Simple data ( separately ) :
18 , 30 , 14 , 21 , 25 , 24 , 34 , 15 , 25 , 26 , 18 , 24 , 18 , 33
, 20
1) Find ( Mean , Mode , Median , Range , Midrange , Standard
Deviation , Variance )
2) Sketch the distribution Shapes approximately.
3) Determine the type of shape
4) Find coefficient of variation
5) Find the value of the 20th...

Suppose that the following frequency table contains data on the
number of absences in a school year due to illness or injury for 80
randomly selected high school students. Use the table to determine
the median number of absences for these 80 students. Provide your
answer with precision to one decimal place.
Number of absences
Frequency
0
20
1
9
2
11
3
8
4
5
5
10
6
4
7
3
8
3
9
1
10
3
11
3...

Define the following terms:
Accuracy.
Precision.
Systematic Errors.
Random Errors.
Absolute System.
Gravitational System.
A Weight of 129 Kg, ( The unit itself indicates mass ) is
suspended by a cable from an I-Beam. Calculate the Force or Tension
in the cable in Newtons to hold the mass stationary when the local
gravitational acceleration is:
9.827 m/s2.
1.97 m/s2.
Convert
126 kg to lbm.
400 lbm/s to slugs/hr.
The density of Aluminium is 170 lbm/ft3. Convert the
SI Units (ie...

John and Mary visited 29 randomly selected Starbucks locations
and recorded the number of cappuccinos sold at each coffee shop on
April 1st. They summarized the data in the following frequency
distribution table: (Variable ,Frequency) (0, 2 ) (1, 5) ( 2, 8)
(3, 10) (4, 4) (5, 2)
a. For this scenario, identify the following: • Variable •
Individual (Subject) • Sample • What percentage of Starbucks
locations sold at least 3 cappuccinos?
b. Calculate the sample mean. Note:...

Calculate the mean, median, mode, variance (population) and
standard deviation (sample) for the following test grades: 65, 60,
67, 71, 75, 80, 65 Use this information to answer questions #1-4.
Question 1 (0.5 points) Saved The mode is: Question 1 options: 65
60 There is no modal category 75 71 Question 2 (0.5 points) Saved
The median is: Question 2 options: 67 65 80 66 None of the above
Question 3 (0.5 points) What is the approximate population variance
for...

Using If and LookUp Formulas
Formatting Grades
Input boxes in tan
Output boxes in yellow
Given data in blue
Answers in red
Professor Streterstein is a bit absentminded. His
instructor’s grade book is a mess, and he
would like your help cleaning it up and making it
easier to use. In Professor Streterstein’s
course, the maximum possible points a student can
earn is 750. The following table displays
the grade equivalent to total points for the
course.
Professor Streterstein's Course...

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