Reference no: EM132351396
In your drawer you have 10 white socks, 6 black socks, 4 brown socks and 2 blue socks. Your roommate is still asleep, and you cannot turn the light on while you get dressed. You reach in blindly and grab two socks. What is the probability of pulling out a matching pair of black socks?
A. (6/22- 5/21) C. (6/22+5/21)
B. (6/22-6/22) D. (6/22+6/21)
Assume that random guesses are made for 40 multiple choice questions on the Statistics final test and that there are 4 choices on each question with the probability of success 0.25. Find the probability that the student will pass the test by answering at least 20 questions correctly (This problem meets all the requirements of a binomial situation and the following choices are given in a rounded percentage form.)
A. 0.02% B. 0.04% C. 0.06% D. 99.94%
What symmetric interval about the mean will contain approximately 97% of the heights?
A. 58.16 to 69.44 B. 58.60 to 69.00 C. 59.52 to 68.08 D. 58.70 to 68.90
Suppose random samples of 60 female heights are selected repeatedly from the population. What is the approximate mean and standard deviation for the sampling distribution of sample means?
A. Mean = 63.8, SD = 2.6 C. Mean = 8.24, SD = 2.6
B. Mean = 8.24, SD = 0.34 D. Mean = 63.8, SD = 0.34