Question 1

Which of the following best describes the primary purpose of statistics in business decision-making?

Accepted Answer

To analyze data and support objective, evidence-based decisions.

Question 2

A company wants to estimate the average time customers spend on its website. Which statistical concept is MOST appropriate for this scenario?

Accepted Answer

Descriptive statistics

Question 3

Suppose you are given a dataset of monthly sales figures. Which Excel function would you use to calculate the mean sales value?

Accepted Answer

AVERAGE()

Question 4

Which of the following is NOT a recommended strategy for solving problems in MyLabStat homework assignments?

Accepted Answer

Copying answers from another student.

Question 5

A business analyst wants to predict future sales based on advertising spend. Which statistical method should they use?

Accepted Answer

Regression analysis

Question 6

If a student receives scores of 85, 90, and 95 on three quizzes, what is their average score? Use the formula $$	ext{Average} = \frac{	ext{Sum of scores}}{	ext{Number of scores}}.$$

Accepted Answer

90

Question 7

Which of the following is a violation of DePaul University's Academic Integrity Policy (AIP) in the context of statistics coursework?

Accepted Answer

Copying or pasting answers from an online source into your homework.

Question 8

A student is analyzing the relationship between two variables: advertising budget and sales revenue. Which Excel function is most appropriate to calculate the correlation coefficient?

Accepted Answer

CORREL()

Question 9

Which of the following best describes a hypothesis test in business statistics?

Accepted Answer

A procedure to determine if a claim about a population parameter is likely to be true.

Question 10

A company wants to know if a new training program improves employee productivity. Which statistical approach should be used to compare productivity before and after the program?

Accepted Answer

Paired sample t-test

Question 11

If the probability of a customer making a purchase is 0.2, what is the probability that out of 5 customers, exactly 2 will make a purchase? Use the binomial probability formula: $$P(X = k) = \binom{n}{k} p^k (1-p$$)^{n-k}$$ where n=5$, k=2$, p=0.2$.

Accepted Answer

$$0.2048$$

Question 12

Which of the following is an example of a continuous variable in business statistics?

Accepted Answer

Annual revenue in dollars

Question 13

A student is required to submit an Excel project analyzing sales data. Which of the following actions would be considered academic dishonesty?

Accepted Answer

Submitting a project copied from another student.

Question 14

Which formula should be used to calculate the standard deviation of a dataset in Excel?

Accepted Answer

STDEV()

Question 15

A business wants to determine if there is a significant difference in average sales between two regions. Which statistical test is most appropriate?

Accepted Answer

Independent sample t-test

Question 16

If a dataset contains the values 10, 20, 30, 40, and 50, what is the median? Use the formula $$	ext{Median} = 	ext{Middle value when data is ordered}.$$

Accepted Answer

30

Question 17

Which of the following is a key expectation for students in a statistics for business course?

Accepted Answer

Active engagement and consistent effort in class and assignments.

Question 18

A company collects data on customer satisfaction scores (1 to 10). What type of variable is this?

Accepted Answer

Ordinal

Question 19

Which of the following is NOT a recommended technology for statistics coursework according to the syllabus?

Accepted Answer

Smartphone for submitting assignments

Question 20

A student wants to calculate the percentage grade for a score of 72 out of 80 on a quiz. Which formula should they use? $$	ext{Percentage} = \frac{	ext{Score}}{	ext{Total}} 	imes 100$$

Accepted Answer

$$90\%$$

Statistics for Business: Course Syllabus and Study Guide

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드