Questions 15-18) Telephone survey. A telephone survey uses a random digit dialing machine to call subjects. The random digit dialing machine is expected to reach a live person 15% of the time. Question 15. In eight attempts, what is the probability of achieving exactly two successful calls? A. 0.0085 B. 0.1275 C. 0.2376 Question 16. What is the probability of two or fewer successful calls in eight attempts? A. 0.2376 B. 0.5643 C. 0.7687               D. 0.8948 Question 17. What is the expected value for the number of contacts in eight attempts? A. 0.1275 B. 0.9099 C. 1.2000 Question 18. What is the variance for the number of contacts in eight attempts? A. 0.1500 B. 1.0200 C. 1.2000

Saved Listen             Question 1 options: Nova has a pop quiz with 9 multiple choice questions. Each question has 3 answer options. Assume that Nova randomly guesses on every question. Find the probability that Nova passes the test with a score of 70% or more. Round to the nearest tenth of a percent (1 decimal place percent).       Question 2    Saved Listen             Question 2 options: The chance of an email being spam is 44%. If you receive 33 emails in a single day, find the probability that exactly 14 of them are spam. Round to the nearest tenth of a percent (1 decimal place percent).       Question 3 The sensitivity of a medical test is the true positive rate. In other words, the sensitivity is the probability that a person with the condition is correctly identified as having it. The specificity of a test is the true negative rate. In other words, the specificity is the probability that a person without the…

Suppose there is a game where you throw a marble and, if it lands in a circle on the ground, it is counted as a success. Suppose that the probability of you throwing a marble and landing in a circle on the ground is 35%. What is the probability of playing 6 rounds and landing in a circle on the ground 3 times?   a. 18%   b. None of these   c. 24%   d. 65%   e. 35%

Extra Credit! Let's assume 36% of people have blood type O. At a health clinic, you sample 11 people. Calculate the probability of seeing 4 people out of 11 with blood type O. 6.38% O 24.38% 21.28% 330