MBA5008 Week 1: Chapter 3 and 4 Homework
 You roll a fair sixsided die with the hopes of rolling a 5 or a 6. These two events are ___________ because they have no sample points in common.
    c. mutually exclusive events  
 

 The mean of a sample is _____.
 a. computed by summing the data values and dividing the sum by (n − 1)  

 b. computed by summing all the data values and dividing the sum by the number of items  

 c. always equal to the mean of the population  

 d. always smaller than the mean of the population 

 If a data set has an even number of observations, the median _____.
 a. must be equal to the mean  


 c. is the observation recorded most often  

 d. is the average value of the two middle items when all items are arranged in ascending order 

 The “Top Three” at a racetrack consists of picking the correct order of the first three horses in a race. If there are 10 horses in a particular race, how many “Top Three” outcomes are there?
 If two events are independent, then _____.
 a. they must be mutually exclusive  

 b. the sum of their probabilities must be equal to 1  

 c. the probability of their intersection must be 0  

 d. None of these answers are correct 

 Given that event Ehas a probability of .25, the probability of the complement of event E
 a. cannot be determined with the above information.  

 b. can have any value between 0 and 1  



 The _____ denotes the number of standard deviations x_{i}is from the mean x̄.
 Which of the following depicts a moderately leftskewed distribution?
a.
b.
c.
d.
 The symbol ∪ indicates the _____.
a. intersection of events  

 b. sum of the probabilities of events  



 Excel’s _____ function can be used to compute the population variance.



 d. None of these answers are correct. 

11.
 Consider a sample with a mean of and a standard deviation of . Use Chebyshev’s theorem to determine the percentage of the data within each of the following ranges (to the nearest whole number).
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