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WGU C955 Probability and Statistics Objective Assessment Exam Questions and Answers (2023 - 2024) (Verified by Expert)

WGU C955 Applied Probability and Statistics Final Exam (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct| Grade A Q: 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 Answer: 21 Q: A new video g...

Identify the number of terms and the coefficient for the x term in the expression: 4x−3y+7 a Terms: 2 ; Coefficient: −3 b Terms: 2 ; Coefficient: 4 c Terms: 3 ; Coefficient: −3 d Terms: 3 ; Coefficient: 4 - Answer-Terms: 3 ; Coefficient: 4 What is the equation of the graph in slope-intercept form? {{ A graph of a line moving up and to the right that passes through (0,-1) and (1,2). }} a y=−3x−1 b y=3x−1 c y=3x+1 d y=−3x+1 - Answer-y=3x-1 Solve for x in the ...

A researcher conducts an observational study and finds a correlation between managers' income and the number of college credits earned. The correlation coefficient was r=.85 with a regression equation of y=515x+120000. What can you say about the relationship between these variables? - Answer-There is an association between these variables. A researcher wants to know if there was a relationship between student age and desire to complete a college degree. To answer this question, the researche...

lurking variable - Answer-A variable that is not included in an analysis but that is related to two (or more) other associated variables which were analyzed. observational study - Answer-The researcher observes if there is an association between variables. There is no treatment or control group. sampling method - Answer-The technique used to select people within the sampling frame. correlation - Answer-An observed relationship between two quantitative variables. While this is most commo...

Changing Improper Fractions and Mixed Numbers - Answer-Improper fractions can be converted to mixed numbers by following these steps: Write division problem with numerator divided by denominator. Divide to determine quotient and remainder. Write mixed number with the quotient as the whole number and the remainder as the numerator over the same denominator. Changing Mixed Numbers Into Improper Fractions - Answer-Mixed numbers can also be converted to improper fractions by following th...

Population - Answer-The entire group that is the target of interest, not just people. Eg, "the population of 1 bedroom apartments" Sample - Answer-A subgroup of the population. Eg, "the 1 bedroom apartments with dishwashers." Steps in the statistics process - Answer-1. PRODUCE DATA (by studying a sample of the population) 2. EXPLORATORY DATA ANALYSIS (Summarize data.) 3. PROBABILITY ANALYSIS (Determine how the sample may differ from the population.) 4. INFERENCE (draw conclusions) ...

Basic probability - Answer-#of total come# of total outcome in the sample space P(B | A) - Answer-conditional probability P(A and B)=P(A) • P(B) - Answer-multiplication rule- independent events P(A and B)= P(A) • P(B|A) - Answer-multiplication rule- dependent events P(A or B)= P(A) + P(B) - Answer-addition rule- Disjoint P(A or B)= P(A) + P(B) - P(A and B) - Answer-addition rule- non-Disjoint product - Answer-The result of multiplying values. factorization - Answer-The...

What is 3/4 divided by 2/3? A) 9/8 B) 5/12 C) 5/7 D) 6/7 - 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? A) 9.02 miles B) 10.02 miles C) 10.12 miles D) 11.2 miles - 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 0.5 tbsp 1 tbsp 2.5 tbsp 6.5 tbsp - Answer-6.5 tbsp...

A researcher wants to know if there was a relationship between student age and desire to complete a college degree. To answer this question, the researcher used a local community college as the sampling frame and then used stratified sampling to get a sample of students from 18 to 80 years old. Based on the information given, is there any potential bias in this study? a Yes, because the sampling frame does not match the intended population of the question. b Yes, because the sampling method ...

five-number summary - Answer-The minimum, first quartile, median, third quartile, and the maximum. A box plot represents the five numbers in a five-number summary. two-way frequency table - Answer-A table that contains frequency counts for two categorical variables. [See also contingency table] joint frequencies - Answer-The frequency counts in each cell of the table. contingency table - Answer-A table that contains frequency counts for two categorical variables. [See also two-way frequ...

The relationship between the two variables on a scatterplot can be measured by what statistic? {{ Scatterplot of sales on the x-axis and profit index on the y-axis. }} a Correlation coefficient ( r ) b Regression c ANOVA d Chi-square - Answer-Correlation coefficient ( r ) A study was completed to investigate if commutes of longer than 30 minutes increased the risk of burnout. The results of the study are in the table below. ,Lenth of Commute ,<30 Minutes ,>30 Minutes ,Tota...