As the sample size increases, the variability among the sample means _____.
a. increases
b. decreases
c. remains the same
d. depends upon the specific population being sampled
Question 2
A salesperson contacts 8 potential customers per day. From past experience, we know that the probability of a potential customer making a purchase is .10.
a. Define the random variable in words for this experiment.
b. What is the probability the salesperson will make exactly 2 sales in a day?
c. What is the probability the salesperson will make at least 2 sales in a day?
d. What percentage of days will the salesperson not make a sale?
e. What is the expected number of sales per day?
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