0 Question 3 v A population ofvalues has a normal distribution with p = 178.2 and a = 98.8. You intend to dr a random sample of size n = 198. What is the mean of the distribution of sample means? What is the standard deviation of the distribution of sample means (i.e. the standard error)? (Report answer accurate to 2 decimal places.) C] CNNBC recently reported that the mean annual cost of auto insurance is 999 dollars. Assume the standard deviation is 275 dollars. You take a simple random sample of 80 auto insurance policies. Find the probability that a single randomly selected value is less than 983 dollars. P(X 24.6) = C] (Enter your answers as numbers accurate to 4 decimal places.) Find the probability that a sample of size n = 51 is randomly selected with a mean greater than 24.6. P()_(> 24.6) = C] (Enter your answers as numbers accurate to 4 decimal places.) Submit Question 0 Question 6 v Business Weekly conducted a survey of graduates from 30 top MBA programs. On the basis of the survey, assume the mean annual salary for graduates 10 years after graduation is 153000 dollars. Assume the standard deviation is 33000 dollars. Suppose you take a simple random sample of 98 graduates. Find the probability that a single randomly selected policy has a mean value between 1560002 and 1563335 dollars. P(156000.2 Suppose the true proportion of voters in the county who support a school levy is 0.5. Consider the sampling distribution for the proportion of supporters with sample size n = 175. a. What is the mean of this distribution? b. What is the standard error (Le. the standard deviation) of this sampling distribution, rounded to three decimal places? 023 = Submit Question 0 Question 8 v According to a survey, 10% ofAmericans are afraid to y. Suppose 1,100 Americans are sampled. a. What is the probability percentage that 121 or more Americans in the survey are afraid to y? Round the percent to two decimal places. :] b. What is the probability percentage that 165 or more Americans in the survey are afraid to y? Round the percent to two decimal places. :] c. What is the probability percentage that 8% or less of the Americans surveyed answered they were afraid to y? Round the percent to two decimal places. :] Question Help: EIVideo Submit Question . Question 9 The population of weights ofa particular fruit is normally distributed, with a mean of 721 grams and a standard deviation of 6 grams. If 19 fruits are picked at random, then 16% of the time, their mean weight will be greater than how many grams? Round your answer to the nearest gram. :1 Question Help: El Video 0 Question 10 v The population of weights ofa particular fruit is normally distributed, with a mean of 721 grams and a standard deviation of 6 grams. If 19 fruits are picked at random, then 16% of the time, their mean weight will be greater than how many grams? Round your answer to the nearest gram. :1 Question Help: El Video 0 Question 11 v In an effort to cut costs and improve prots, any US companies have been turning to outsourcing. In fact, according to Purchasing magazine, 55% of companies surveyed outsourced some part of their manufacturing process in the past two to three years. Suppose 550 of these companies are contacted. a. What is the probability percentage that 360 or more companies outsourced some part of their manufacturing process in the past two or three years? Round the percent to two decimal places. :1 b. What is the probability percentage that 280 or more companies outsourced some part of their manufacturing process in the past two or three years? Round the percent to two decimal place. :1 c. What is the probability percentage that 48% or less of these companies outsourced some part of their manufacturing process in the past two or three years? Round the percent to two decimal