STATISTICS QUIZ

341 WEEK 4 QUIZ :

1.) When students go to the Health Center these days complaining of pain, they are asked to assess their pain using emoticons. One person’s assessment is an example of what kind of data?

 

(2.) Three principal data collection methods are interviews, questionnaires, and observational studies. (True or False)

 

(3.) Which of the following are not types of probability ? 1) Marginal probability 2) Union probability 3) Joint probability 4) Conditional probability

 

(4.) In December of 1999, a research team at Ohio State University reported that the median allowance for U.S. teenagers is $50 per week, with a coefficient of skewness (as calculated in class) of 0.762. While some teenagers received no allowance, others reported receiving $200 per week. Based on this information, the mean allowance for U.S. teenagers is most likely. (What is the answer?)

 

(5.) Statistics can be used in which of the following business scenarios ? a) Quality assurance b) Decision making in the presence of risk c) Forecasting d) Sales e) Budgeting f) Human resources g) Advertising

 

(6.) The laws of probability as they apply to what ?

 

(7.) Buyers for large department stores typically purchase costume jewelry in assortments rather than by the piece. A buyer is interested in ordering a ring that is made in 5 sizes, and comes in lots of 50 rings. The sizes and the proportion of rings manufactured in that size are in the table below. Size 5 6 7 8 9 Probability 0.1 0.2 0.4 0.2 0.1 What is the probability that, at most, a shipment received will contain 10 size-six rings?

 

(8.) What are mutually exclusive events ?

 

(9.) What three possible outcomes / impacts could motivation have on sales behavior ?

 

(10.) One characteristic of any Student’s t distribution is that (Multiple choice) a. it is right skewed b.as n increases, the t-distribution approaches a uniform distribution c. it is described by its degrees of freedom d.it has a mean of 0 and a standard deviation of 1