Question

**Subject: Statistics**

**Please show complete work for the multiple-choice
questions below**

**1**. Given that a collection of scores on a quiz
leads to a mean of 40, a median of

38, and a mode of 36. If we added l0 points to each score what
would be the

new median?

**a**. 38

**b**. 40

**c**. 48

**d**. 50

**2**. When an odd number of ungrouped scores are
arranged according to

magnitude, the median is the:

**a**. score with the greatest frequency

**b**. middle score

**c**. mean of the two middle scores

**d**. mean of the highest and lowest scores

**3**. When an even number of ungrouped scores are
arranged according to

magnitude, the median is the:

**a**. score with the greatest frequency

**b**. mean of the two middle scores

**c**. middle score

**d**. mean of the highest and lowest scores

**4**. A group of 20 students obtained a mean score
of 70 on an examination. A

second group of 30 students obtained a mean score of 80 on the
same

examination. The mean score for the 50 students was:

**a**. 70

**b**. 74

**c**. 75

**d**. 76

**5**. The most frequently occurring score is
the:

**a**. midrange

**b**. mean

**c**. mode

**d**. median

Answer #1

1.

48 because we add a constant 10 to everything, median increases the same (38 + 10) = 48

**c. 48**

2.

If there is an odd number of terms, the median is the center term.

**b. middle score**

3.

If there is an even number of terms, add the two middle terms and divide by 2.

**b. mean of the two middle scores**

4.

20 students obtained a mean score of 70

30 students obtained a mean score of 80

The mean score for the 50 students was: 70+80 / 2 = 75

**c. 75**

5.

The most frequently occurring score is the:

**c. mode**

*****please ask if you have any doubts.Happy to help
you.Thank you.Please Like.**

Subject: Statistics
Please show complete work for the multiple-choice
questions below
1.11.Which sample exhibits the most
variability?
a. 2,4,6,8,l0,l2
b. 2,2,3,ll,l2,l2
c. 2,3,4,l0,ll,l2
d. 2,6,7,7,8,l2
2. Distributions A and B have the same mean and
range. The standard
deviation of distribution A is l5, and of distribution B is 5. We
may conclude
that:
a. the scores in distribution A are grouped
closer to the mean than are the
scores in distribution B.
b. the scores in distribution B are...

Suppose that one a guiz given to 7 students, the maximum score
was 15. (a) If the median score was 10, what is the highest
possible mean? the lowest? (b) If the mean score was 10, what is
the largest possible number of students who could have received 0
points on the quiz? (c) If the mode of the set of scores was 15,
what is the largest possible median? how about the largest possible
mean?

Please use excel and show the work.
Below is a frequency table for midterm exam scores
Scores Number of students
90 and up 5
80-89 12
70-79 40
60-69 18
50-59 13
40-49 6
30-39 6
A.) Construct a frequency table that displays probabilities of
occurrence for each class and cumulative probabilities.
B.) What is the probability that a random student picked will
have a score of at least 90? Less than 90?
c.) What is the probability that a...

Only need answer for (c) and (f)
You can find scores of a test: {
56,67,67,70,73,73,75,76,77,79,80,81,83,83,85,87,88,89,92,93 }
(a) Obtain a frequency distribution for the test. (The number of
bins and intervals should be determined according to the rules in
the class slides). (b) Draw a frequency histogram.
(c) Use the frequency distribution to compute the mean
and the median and variance. Are there any outliers in this data
set?
(d) Plot the box plot of data based on the statistics...

Only need answer for (f)
You can find scores of a test:
{ 56,67,67,70,73,73,75,76,77,79,80,81,83,83,85,87,88,89,92,93
}
(a) Obtain a frequency distribution for the test. (The number of
bins and intervals should be determined according to the rules in
the class slides).
(b) Draw a frequency histogram.
(c) Use the frequency distribution to compute the mean and the
median and variance. Are there any outliers in this data set?
(d) Plot the box plot of data based on the statistics you can...

Student
Pretest
Post-test
A
33
42
B
39
38
C
39
37
D
39
42
E
40
42
F
41
53
G
48
46
H
48
52
I
48
44
Sum:
A higher score on the mindset quiz means that the student has
more of a growth mindset. In these examples,
the units are points.
6. Compute the mean of the mindset quiz scores for the
Post-test.
Show your numerator and denominator.
7. What is the mode of the Post-test mindset...

QUESTION 1 [13 MARKS]
Write down only the letter corresponding to your choice next to
the question number.
1.1. A random variable that can assume only a finite number of
values is referred to as a
a) Infinite sequence
b) Finite sequence
c) Discrete random variable
d) Discrete probability function
e) All of the above
1.2 Which one of the following statements is incorrect?
a) A data set provides information about people, objects or
other entities.
b) If the possible...

QUESTION 1
Suppose a data set is skewed left. What is the most likely
relationship between the mean and the median?
a.
The mean is smaller than the median.
b.
The mean is larger than the median.
c.
The mean and median are not related to each other at all.
d.
The mean and median are essentially equal.
QUESTION 2
Which of the following CANNOT be obtained by a boxplot?
a.
mean
b.
IQR
c.
all of the above can...

1)What would be the level of measurement for the quantity of
Funko Pops owned by the people in a statistics class?
a) Ordinal
b) Nominal
c) Interval
d) Ratio
2) Which sampling method was used if a researcher studying the
annual income of students went classroom to classroom during the
11:00 AM period and asked to randomly speak to 3 students in each
room?
a) Stratified Sampling
b) Convenience Sampling
c) Cluster Sampling
d) Systematic Sampling
3) the height (in...

Parts A-D
A) To be eligible for further consideration,
applicants for certain civil service positions must first pass a
written qualifying examination on which a score of 85 or more must
be obtained. In a recent examination, it was found that the scores
were normally distributed with a mean of 65 points and a standard
deviation of 10 points. Determine the percentage of applicants who
passed the written qualifying examination.
________%
B)The scores on an economics examination are
normally distributed...

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