Reference no: EM132847746

-Suppose that a sample of size 47 is drawn from a population with mean 42 and standard deviation 69 . Find the value of , the standard deviation of the distribution of sample means. Write only a number as your answer. Round to two decimal places (for example: 8.21).

-The weights of bowling balls are normally distributed with mean 11.5 pounds and standard deviation 2.7 pounds. A sample of 36 bowling balls is selected. What is the probability that the average weight of the sample is less than 11.04 pounds? Write only a number as your answer. Round to 4 decimal places (for example 0.0048).

-A survey of high school students revealed that the numbers of soft drinks consumed per month was normally distributed with mean 25 and standard deviation 15. A sample of 36 students was selected. What is the probability that the average number of soft drinks consumed per month for the sample was between 29.5 and 30 soft drinks? Write only a number as your answer. Round to 4 decimal places (for example 0.0048).

-To use the Central Limit Theorem for Proportions, the quantities np and n(1 - p) must be greater than or equal to _____. Write only a number as your answer (for example 15).

-According to one pollster, 58% of children are afraid of the dark. Suppose that a sample of size 20 is drawn. Find the value of , the standard deviation of the distribution of sample proportions. Write only a number as your answer. Round to two decimal places (for example: 8.21)

-It has been reported that 48% of people text and drive. A random sample of 60 drivers is drawn. Find the probability that the proportion of people in the sample who text and drive is less than 0.491 .Write only a number as your answer. Round to 4 decimal places (for example 0.3748).