Choose the correct problem formulation: It is known that 70% of the customers in
ID: 3057671 • Letter: C
Question
Choose the correct problem formulation: It is known that 70% of the customers in a sporting goods store purchase a pair of running shoes. A random sample of 25 customers is selected. Assume that the customers' purchases are made independently, and let x represent the number of customers who purchase a pair of running shoes. What is the probability that no more than 19 customers purchase a pair of running shoes?
P(x <= 18) - P(x <= 17)
P(x <= 19)
1 - P(x < 17) = 1 - P(x <= 16)
P(x <= 21) - P(x <= 16)
None of the above.
2.
t is known that 70% of the customers in a sporting goods store purchase a pair of running shoes. A random sample of 25 customers is selected. Assume that the customers' purchases are made independently, and let x represent the number of customers who purchase a pair of running shoes. What is the probability that exactly 17 customers purchase a pair of running shoes?
0.171
0.677
0.644
0.699
a.P(x <= 18) - P(x <= 17)
b.P(x <= 19)
c.1 - P(x < 17) = 1 - P(x <= 16)
d.P(x <= 21) - P(x <= 16)
e.None of the above.
2.
t is known that 70% of the customers in a sporting goods store purchase a pair of running shoes. A random sample of 25 customers is selected. Assume that the customers' purchases are made independently, and let x represent the number of customers who purchase a pair of running shoes. What is the probability that exactly 17 customers purchase a pair of running shoes?
0.171
0.677
0.644
0.699
Explanation / Answer
Choose the correct problem formulation: It is known that 70% of the customers in a sporting goods store purchase a pair of running shoes. A random sample of 25 customers is selected. Assume that the customers' purchases are made independently, and let x represent the number of customers who purchase a pair of running shoes. What is the probability that no more than 19 customers purchase a pair of running shoes?
P(x <= 18) - P(x <= 17)
P(x <= 19)
1 - P(x < 17) = 1 - P(x <= 16)
P(x <= 21) - P(x <= 16)
None of the above.
2.
t is known that 70% of the customers in a sporting goods store purchase a pair of running shoes. A random sample of 25 customers is selected. Assume that the customers' purchases are made independently, and let x represent the number of customers who purchase a pair of running shoes. What is the probability that exactly 17 customers purchase a pair of running shoes?
0.171
0.677
0.644
0.699
a.P(x <= 18) - P(x <= 17)
b.P(x <= 19)
c.1 - P(x < 17) = 1 - P(x <= 16)
d.P(x <= 21) - P(x <= 16)
e.None of the above.
2.
t is known that 70% of the customers in a sporting goods store purchase a pair of running shoes. A random sample of 25 customers is selected. Assume that the customers' purchases are made independently, and let x represent the number of customers who purchase a pair of running shoes. What is the probability that exactly 17 customers purchase a pair of running shoes?
0.171
0.677
0.644
0.699