Business Research Quiz

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1. When considering analysis of research data, which is a characteristic we look for?

		Spread in the data
		Location (central tendency of the data)
		Shape of the data
		Stability of the data
		All of the above

5 points

Question 2

1. Which of the following describes the data observation that occurs most frequently?

		Mean
		Median
		Mode
		Range
		Standard deviation

5 points

Question 3

1. What is σ (sigma) a measure of?

		Location
		Spread
		Stability
		Mean
		Mode

5 points

Question 4

1. Which test is best to test the hypothesis that multiple variances (2 or more) are equal?

		t test
		proportions test
		Mood's median test
		Levene's test
		Analysis of Variance (ANOVA)

5 points

Question 5

1. In the sampling, hypothesis testing and analysis of business research data, which of the following is true?

		We make inferences about the population parameters based on sample statistics
		The sample should be representative of the population
		A larger sample size is always better
		Answers1 and 2 only
		Answers 1, 2 and 3

5 points

Question 6

1. What is the advantage of a dot plot over a histogram?

		Preserves the original data in the plot
		Shows shape of the data in the plot
		Shows spread of the data in the plot
		Shows central location of the data
		Shows priority of categories

5 points

Question 7

1. What is the name of the research data analysis tool shown below?

		Histogram
		Pareto chart
		Bar graph
		Box plot
		Line plot

5 points

Question 8

1. What is the implication of a data distribution with mean, median and mode being approximately equal?

		The spread in the data are equal
		The data are unstable
		The data can not be plotted using a Histogram
		The data are normally distributed
		The data can not be plotted using a Box Plot

5 points

Question 9

1. Which test is best to assess whether two independent means are equal?

		2-sample t test
		Levene's test
		paired t test
		one proportion test
		two proportions test

5 points

Question 10

1. Which test is best to assess whether the % defective is the same between two independent business units?

		2 sample t test
		Levene's test
		paired t test
		one proportion test
		two proportion test

5 points

Question 11

1. A researcher’s hypothesis to test for equality of means at 95% confidence was rejected with a p-value of 0.01. What is the chance the researcher is wrong about this 'reject' decision?

		95%
		5%
		1%
		99%
		impossible to tell without further analysis

5 points

Question 12

1. A researcher’s hypothesis to test for equality of means (i.e., 2 sample t test) at 95% confidence was accepted with a p-value of 0.25 What is the chance the researcher is wrong about this "accept" decision?

		95%
		5%
		25%
		75%
		impossible to tell without further analysis

5 points

Question 13

1. Refer to the Minitab output below. The results of a statistical test at 95% confidence (significance level of 0.05) to determine the difference in the average amount of time to process a legible insurance claim vs. an illegible insurance claim are below. What is the decision?

		continue to process legible insurance claims
		accept the null hypothesis
		reject the null hypothesis
		continue to process both legible and illegible insurance claims
		the amount of time to complete a legible claim is about the same as an illegible claim

5 points

Question 14

1. Refer to the Minitab output below. What is the research hypothesis under consideration?

		Ho: σ21 = σ22
		Ho: π1 = π2
		Ho: µ21 = µ22
		Ho: µ1 = µ2
		Ho: σ1 = σ2

5 points

Question 15

1. What is the most appropriate research hypothesis for the following scenario? “Historically, the mortality rate for particular type of brain surgery is 10%. A new, simpler technique has been developed that may reduce the mortality rate?

		Ho: σ2 ≤ 10%
		Ho: π ≤ 10%
		Ho: µ ≤ 10%
		Ho: µ1 ≤ µ2
		Ho: π1 ≤ π2

5 points

Question 16

1. In managing the risks associated with statistically based research decisions, which is NOT likely something the researcher can select?

		alpha
		beta
		delta
		sample size
		sigma

5 points

Question 17

1. Which is best defined as “the critical difference a researcher wants to be able to detect”?

		alpha
		beta
		delta
		sample size
		sigma

5 points

Question 18

1. What is ANOVA? 

		a stellar event
		a PBS program
		a type of chevrolet
		a statistical research tool to test the hypothesis concerning equality of multiple variances
		a statistical research tool to test the hypothesis concerming equality of multiple means

5 points

Question 19

1. Refer to the ANOVA output below. A business researcher is investigating the process inputs that influence late orders (measured as % late). Which statement is FALSE?

		Three factors are being researched simultaneously
		There is a chance of a beta error in this analysis
		Four different product types were considered in this research
		Particular combinations (interactions) of Order Frequency and Quantity significantly influences late orders
		The Order Frequency significantly influences whether an order is late

5 points

Question 20

1. Refer to the factor plot below. The factor plot shows the mean percent of time (i.e., 0.15 = 15%) orders are late based on particular combinations of order quantities and order frequencies. Which would be a reasonable recommendation based on this plot?

		Look elsewhere (i.e., another factor) to address Late Orders
		Address order Quantities between 1 and 3 to help reduce Late Orders
		Address order Quantities greater than 3 to help reduce Late Orders
		Address order Quantities between 1 and 3 where the orders occur Daily, to help reduce Late Orders
		Address order Quantities greater than 3 where the orders occur Daily, to help reduce Late Orders