Of 87 adults selected randomly from one town, 67 have health insurance. Find a 90 confidence interval for the proportion of all adults in the town who have health insurance.
A) 0.684 to 0.832 B) 0.654 to 0.863 C) 0.643 to 0.874 D) 0.670 to 0.846
Q. 2In a recent online survey, participants were asked to answer yes or no to the question Are you in favor of stricter gun control? 6571 responded yes while 4437 responded no. There was a fifty-cent
What sampling technique was used?
A) convenience
B) systematic
C) stratified
D) cluster
E) simple random
Q. 3According to a college survey, 22 of all students work full time. Find the mean for the random variable X, the number of students who work full time in samples of size 16.
A) 0.22 B) 2.75 C) 4 D) 3.52
Q. 4Number of Pets: The number of pets per family.
A) Cutpoint grouping B) None of these
C) Single-value grouping D) Limit grouping
Q. 5Based on 12,500 responses from 28,500 questionnaires sent to all its members, a major medical association estimated that the annual salary of its members was 99,000 per year. What sampling technique was used?
A) simple random
B) systematic
C) stratified
D) convenience
E) cluster
Q. 6In one city, the probability that a person will pass his or her driving test on the first attempt is 0.65. 11 people are selected at random from among those taking their driving test for the first time.
What is the probability that among these 11 people, the number passing the test is between 2 and 4 inclusive?
A) 0.0397 B) 0.0481 C) 0.0499 D) 0.0557
Q. 7Arranging the age of students in a class in from youngest to oldest yields ordinal data.
A) True B) False
Quick Reply
