1) Which distributions are discrete?
a. the normal distribution and the Poisson
b. the Poisson distribution, the binomial distribution, and the uniform distribution.
c. the binomial distribution and the exponential distribution.
d. the Poisson distribution, the binomial distribution, and the normal distribution.
e. none of the answers above are accurate
2) At a small store, a customer enters the front door on average every 8 minutes. A prior study indicated that the time between customers entering the front door during weekdays follows an exponential distribution. What is the probability that the time between customers entering the store on a weekday will be less than or equal to 7?
3) You read a research paper that applies to your industry, and it says that when people are given a list of facts about your product, they are more likely to buy your product and that the difference between the regular amount of sales and the sales when people read the list of facts is 3 standard deviations. How would you describe the difference of 3 standard deviations (select the best answer)?
a. Can not tell because the units are not specified.
b. It is a small difference because 3 is a small number.
c. It is an important difference because a 3 standard deviation difference would be expected due to random chance in less than 1% of the cases.
d. It is NOT an important difference because with each sample there is variation and the difference could be due to chance.
e. Can not tell because the sample size is not given