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QUESTION 1 The amount of money collected by the snack bar at a large university has been recorded daily for the past ve years. Records indicate that the mean daily amount collected is $4650 and the standard deviation is $400. The distribution is skewed to the right due to several high volume days {football game days). Suppose that 100 clays were randomly selected from the ve years and the average amount collected from those days was recorded. which of the following describes the sampling distribution of the sample mean? A} skewed to the right with a mean of $4650 and a standard error of $40 B) skewed to the right with a mean of $4650 and a standard error of $400 C} normally distributed with a mean of $4650 and a standard error of $40 D} normally distributed with a mean of $4650 and a standard error of $400 QUESTION 2 The amount of corn chips dispensed into a 14-ounce bag by the dispensing machine has been identied at possessing a normal distribution with a mean of 14.5 ounces and a standard deviation of 0.3 ounce. Suppose 400 bags of chips were randomly selected from this dispensing machine. Find the probability that the sample mean weight of these 400 bags exceeded 14.6 ounces. Answer to 4 decimal places. QUESTION 3 The lengths of pregnancies are normally distributed with a mean of 264 days and a standard deviation of 20 days. If 64 women are randomly selected, nd the probability that they have a mean pregnancy between 264 days and 266 days. Answer to 4 decimal places. QUESTION 4 Online customer service is a key element to successll online retailing. According to a marketing survey, 37.5% of online customers take advantage of the online customer service. Random samples of 200 customers are selected. What is the standard error of the proportion? QUESTION 5 The distribution of vitamin C amount in vitamin drops produced by a given factory is approximately Normal , with a mean of 60.0 mg and a standard deviation of 0.5 mg. What is, approximately, the probability of drawing at random a sample of 5 vitamin drops with vitamin content between 60.25 and 60.75 mg? Answer to 3 decimal places. QUESTION 11 Major league baseball salaries averaged $3.26 million with a standard deviation of $1.2 million in a recent year. Suppose a sample of 100 major league players was taken. What would be the mean salary for the sampling distribution? QUESTION 12 Major league baseball salaries averaged $3.26 million with a standard deviation of $1.2 million in a recent year. Suppose a sample of 100 major league players was taken. There is a 10% probability that the sample mean is above what value? QUESTION 13 According to an article, 19% of the entire population in a developing country have high-speed access to the Internet. Random samples of size 200 are selected from the country's population. There is an 80% likelihood that less than what \"A: will have high- speed access to the Internet? QUESTION 6 The World Health Organization estimates that 5% of all adults in sub-Saharan Africa are living with HIV/AIDS. A survey takes a random sample of 1600 adults from all over sub-Saharan Africa. What is the probability that a random sample of 1600 adults in sub-Saharan Africa would have less than 4.5% living with HIV/AIDS? Answer to 3 decimal places. QUESTION 7 Up to 20% of Americans contract influenza each year. A sample of 400 randomly selected Americans is chosen and the number with influenza is recorded. Let X represent the number with influenza in the sample. What is the probability that at most 25% of the sample are observed to have influenza? Answer to 4 decimal places. QUESTION 8 The level of nitrogen oxides (NOX) in the exhaust of cars of a particular model varies Normally with mean 0.25 grams per mile (g/mi) and standard deviation 0.05 g/mi. Government regulations call for NOX emissions no higher than 0.3 g/mi. A company has 4 cars of this model in its fleet. What is the probability that the average NOX level of these cars is above the 0.3 g/mi limit? Answer to 4 decimal places. QUESTION 9 Cats live for 14 years on average, with a standard deviation of 2 years. A simple random sample of 78 recently deceased cats is selected, and the sample mean age at death of these cats is computed. We know the random variable x-bar has an approximately Normal distribution because of A. the law of large numbers. B. the fact that probability is the long-run proportion of times an event occurs. C. the Empirical rule. D. the central limit theorem. QUESTION 10 The owner of a fish market has an assistant who has determined that the weights of catfish are normally distributed, with mean of 3.2 pounds and standard deviation of 0.8 pound. If a sample of 16 fish is taken, what would the standard error of the mean weight equal