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WGU Statistics Test (C187) | NEW VERSION UPDATE | ACCURATE QUESTIONS | VERIFIED ANSWERS | GUARANTEED PASS | Comprehensive Study Resource
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WGU Statistics Test (C187) | NEW VERSION UPDATE | ACCURATE QUESTIONS | VERIFIED ANSWERS | GUARANTEED PASS | Comprehensive Study Resource

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  • October 24, 2024
  • 21
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • WGU Statistics
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WGU Statistics Test NEW VERSION UPDATE
2024-2025 |ACCURATE QUESTIONS |VERIFIEID
ANSWERS|GUARANTEED PASS|NEW
VERSION|
A junior data analyst intern is using linear regression to predict climate change. Given
the following model:

GAT ~ 0 + 0.2 OR + 0.1 GOT + 0.4 EAPG + 0.05 (EAPG)(OR)

Given the following values:

• OR = 10
• GOT = 5
• EAPG = 4

What is the correct result?
0.05
0.61
1.0
6.1
- ANSWER 6.1

From hospital records, the following values for the named components are obtained:

Treatment Control
Average birth weight of infant(g) 3100 2750
SD 420 425
N 75 75
Birth weight is assumed to be normally distributed. The average birth weights in the two
groups are tested using an independent two group t-test. H 0 is that there is no
difference in the birth weight between the treatment and control groups with α = 0.05.

Which formula can be used to solve the problem and show that the birth weight is
significantly different?


t = =5.07
t = = 1.39
t = = 43.93
t = = 12.04
- ANSWER t = =5.07

,A data analyst is doing an analysis using t-tests and gets the following output:

t -stat: 2.8
p-value: .006
Critical value: 1.2

Which conclusion can be drawn?
Accept the null hypothesis.
The critical value is too high.
Reject the null hypothesis.
The two population means are similar.
- ANSWER Reject the null hypothesis

A data analyst is examining the relationship with student drivers between driving skill
and texting. A driving circuit is set up and a group of students are each tested twice.
The first test is performed while sending and receiving texts and the second test is
recorded without texting. After each of the tests, the number of cones hit by student
drivers is recorded.

What are two appropriate conclusions that should be made?

Choose 2 answers



Dependent variable is continuous.
Independent variable is texting condition.
The distribution is skewed.
A t-test should be used
. - ANSWER Independent variable is texting condition.
A t-test should be used.

A shoe company wants to determine the effect of color and design on price for its new
line of shoes.

Classify each of this study's variables as independent or dependent.

Answer options may be used more than once or not at all. Select your answers from the
pull-down list.
- ANSWER Color Independent variable Independent variable
Design Independent variable Independent variable
Price Dependent variable Dependent variable

An insurance company tries to identify the reason for the maximum claim in a particular
segment of a vehicle, and it identifies parameters as given in the following equation:

, Claims segment ~ α + β 1 tire type + β 2 vehicle size + β 3 make year + β 4 mileage +
β 5 vehicle weight + ε

In this equation, what is the vehicle size?

The response variable denoted by y; will work as constant
The confounding variable denoted by y; will determine the claim segment
The coefficient value denoted by β; will be nonsignificant
An explanatory variable that helps determine claim segment.

- ANSWER An explanatory variable that helps determine claim segment.

A company wants to hire employees who are most likely to be successful at selling the
company's products. The data analyst needs to determine if intelligence and friendliness
predict sales performance of current employees. The current employees are given tests
to measure both factors, and their sales performance data is checked, giving the
company three scores for each employee.

What is the criterion variable for this study?


Friendliness
Intelligence
Strategy results
Sales performance
- ANSWER Sales performance

A researcher builds a multiple regression model. While testing the model, the
researcher tests the model assumptions.

Which assumption violates the standard model assumptions?

The variance of the model is constant.
The model terms are additive.
The error terms are dependent.
The model parameters are constant
. - ANSWER The error terms are dependent.

Given the following regressions equation:

Height = 96 + 3.4(Age) - 42(Weight)

When adding an interaction term between Age and Weight, what will be the outcome?

YOUR

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