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WGU C955 COMPLETE PRE-ASSESSMENT QUESTIONS AND ANSWERS NEWEST 2024 EDITION GRADE A+
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WGU C955 COMPLETE PRE-ASSESSMENT QUESTIONS AND ANSWERS NEWEST 2024 EDITION GRADE A+
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WGU C955 COMPLETE PRE-ASSESSMENT QUESTIONS ANDANSWERS NEWEST 2024 EDITION GRADE A+
In a statistics class, 40 students are asked to write their age on a piece of paper and
place the paper in a box. After rotating and shaking the box, 5 pieces of paper are
drawn from the box at random. The data results are as follows:
36
22
21
20
19
What is the median for this data set?
A) 17
B) 21
C) 24
D) 28 - (correct answer) 21
What is 3/4 divided by 2/3? - (correct answer) 9/8
A county park has hiking paths with lengths of 1.05, 3.6, 3.17, and 2.2 miles. What is
the total length, in miles, of hiking paths in the park? - (correct answer) 10.02 miles
If there are 2 tablespoons in 1 fluid ounce, how many tablespoons does the following
calculation yield?
4 fl oz - 1.5 tbsp - (correct answer) 6.5 tbsp
Solve for X:
X - 5/4 = 2/3 - (correct answer) 23/12
Solve for X:
X+5/3=2/3 - (correct answer) -1
Given the inequality:
2y + 6 > 20
Which graph is the solution?
A) {{ y < 3 }}
B) {{ y > 6 }}
C) {{ y > 7 }}
D) {{ y < 7 }} - (correct answer) {{ y > 7 }}
,*** Anytime you multiply or divide both sides of the inequality by a negative number, you
must "flip" or change the direction of the inequality sign
Which graph is the solution for y < 8? - (correct answer) {{ unfilled circle on 8, arrow
pointing left }}
Which graph is the solution for 4y - 6 > 18?
A) {{ y > 4 }}
B) {{ y > 6 }}
C) {{ y < 4 }}
D) {{ y < 6 }} - (correct answer) {{ y > 6 }}
What is the correct line graph for y = 3x + 5? - (correct answer) (0,5) to (2,11)
** all you do here is pick three numbers and plug into the given slope formula to find the
graph.
What is the correct line graph for y = -2x + 9? - (correct answer) (0,9) to (4.5,0)
A normally distributed data set has a mean of 25 and a standard deviation of 2.
Which percentage of the data falls between 23 and 25?
A) 34.0
B) 68.0
C) 95.0
D) 99.7 - (correct answer) 34.0
A given data set is normally distributed with a mean of 200 and a standard deviation of
5.
Which two values does 95% of the data fall between?
A) 180-220
B) 185-225
C) 190-210
D) 195-235 - (correct answer) 190-210
Median - (correct answer) the value in the middle of a data set,
Median of an even data set - (correct answer) When there is an even number of
values in a set of data, there is no single middle value. That makes it a little more
difficult to find the median. In this case, you take the middle two values and add them
together. Then you divide the sum of the values by 2.
, quartiles - (correct answer) values that divide a data set into four equally sized
groups
find the 1st, 2nd and 3rd quartiles of the data set
41,57,61,65,67,70,70,74,82,82,82,90,95,112 - (correct answer) Q1 Q2 Q3
41,57,61,65,65,67,70,70,74,82,82,82,90,95,112
1. find the median of the data set and that will be your Q2
2. looking at the bottom half of the data (excluding the mean) find the half wy point for
Q1 which is how many numbers there are divided by two rounded up or down. so
7/2=3.5 rounded to 4. so for Q1 the half way point is 65
3. repeat for the upper data set
5 Steps to find the interquartile range - (correct answer) 1. Put the data set in order
from least to greatest.
2. Find the median, or midpoint, of the data set. This can also be called the second
quartile (Q2).
3. Identify the median of the lower half of the data set and label it as Q1 (the first
quartile).
4. Identify the median of the upper half of the data set and label it as Q3 (the third
quartile)
5. Subtract Q1 from Q3 to determine the interquartile range, or IQR.
find IQR
100,37,12,20,53,10,20,50,35,30,32,35,72,25 - (correct answer) Q1 Q2=33.5 Q3
10,12,20,20,25,30,32,35,35,37,50,53,72,100
1. put data set in order
2. find the quartiles, even number of data sets to find the mean you add the two data
sets together than divide by two which gives you 33.5
3. Splitting the data down the middle between 32 and 35 gives you your Q2
4. from 10 to 32 gives you your lower data set with 7 total data sets divided by two gives
you a rounded number of 4 which means that the fourth data set is the median of the
lower data set which is 20. 20 is your Q1
5. repeat for Q3
6. IQR = 50-20=30
find IQR
41,57,61,65,67,70,70,74,82,82,82,90,95,112 - (correct answer) Q1 Q2 Q3
41,57,61,65,65,67,70,70,74,82,82,82,90,95,112
82-65=17
what is the range of values of the upper quartile of this data set?
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