Question

1. Questions 1 - 3 refer to the following: At a community college, 46% of students are registered to vote. Suppose that a random sample of 25 students at the college are selected. Find the probability that exactly 8 students are registered to vote Group of answer choices 0.0612 0.32 0.9388 0.1135 2.Questions 1-3 refer to the following: At a community college, 46% of students are registered to vote. Suppose that a random sample of 25 students at the college are selected. Find the probability that exactly 8 students are registered to vote Group of answer choices 0.0612 0.32 0.9388 0.1135 3.Questions 1 - 3 refer to the following: At a community college, 46% of students are registered to vote. Suppose that a random sample of 25 students at the college are selected. If we looked at many randomly selected samples of 25 students at that community college, how many students per sample would we expect to be registered to vote, on average. Group of answer choices 6.21 2.49 11.5 5. Questions 5-8 refer to the following: The length of fish fossils in a dry riverbed is normally distributed with a mean of 4 cm and a standard deviation of 0.5 cm. The middle 40% of fossil lengths are between and cm. Group of answer choices from 3.8 to 4.2 cm from 3.738 to 4.262 cm from 3.9 to 4.1 cm from 3.873 cm to 4.127 cm

Answer 1

1)

Probababilty that exactly 8 student are registered to vote from 25 is

= 8/25

=0.32

b. 0.32

2)

Probababilty that exactly 8 student are registered to vote from 25 is

= 8/25

= 0.32

b. 0.32

3)

average =25*0.46

= 11.5

c. 11.5

4)

here mean is 4 and standard deviation is 0.5

length of interval is 3.5 to 4.5 and we have to find middle 40 percent length so 0.2 to left from mean and 0.2 to right side hence middel 40% fossil length is 3.8 and 4.2.

a.from 3.8 to 4.2 cm