Customers purchase a particular make of automobile with a variety of options. The probability mass function of the number of options selected is shown below. Round your answers to four decimal places (e.g. 98.7654). (A) What is the expected number of options chosen? (B) What is the variance?

The probability model below describes the number of repair calls that an appliance repair shop may receive during an hour. Complete parts a and b below. Repair Calls 2 3 4 Probability 0.1 0.5 0.2 0.2 a) How many calls should the shop expect per hour? The shop should expect calls per hour. (Type an integer or a decimal. Do not round.) b) What is the standard deviation? The standard deviation is. (Round to two decimal places as needed.)

Quiz: Self-Check 3.2 This Question: 1 pt 5 of 8 (4 cor Complete parts (a) and (b) below. The number of dogs per household in a small town Dogs 3 4 Probability 0.662 0.212 0.083 0,022 0.013 0.008 (a) Find the mean, variance, and standard deviation of the probability distribution. Find the mean of the probability distribution. 卫三 (Round to one decimal place as needed.) Find the variance of the probability distribution. (Round to one decimal place as needed.) Find the standard deviation of the probability distribution. | (Round to one decimal place as needed.) (b) Interpret the results in the context of the real-life situation. Click to selecCt your answer(S). Video Tuterial How to Find Probablitie T1-84. =earch

ELEVEN The producer of a weight-loss pill advertises that people who use the pill lose, after one week, an average (mean) of 1.8 pounds with a standard deviation of 1.02 pounds. In a recent study, a group of a a 60 people who used this pill were interviewed. The study revealed that these people lost a mean of 1.73 pounds after one week. If the producer's claim is correct, what is the probability that the mean weight loss after one week on this pill a for a random sample of 60 individuals will be 1.73 pounds or less? Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places.