Suppose that the efficacy of a certain drug is 0.65. Consider the sampling distribution (sample size n = 202) for the proportion of patients cured by this drug. What is the mean of this distribution? What is the standard error of this distribution?

Suppose a professor uses a normal distribution to assign grades in her math class. • She assigns an A to students scoring more than 1.9 standard deviations above the mean. • She assigns an F to students scoring more than 2.2 standard deviations below the mean. She assigns a B to students who Score between 1 and 1.9 standard deviations above the mean. • She assigns a D to students who Score between 1.2 and 2.2 standard deviations below the mean. • All other students get a C. Use the Cumulative Z-Score Table to answer the following questions. The Z-Score Table can be found below by selecting "Read". Write your answer as a percent using 2 decimal places. What percent of the class receives each grade assuming the scores are normally distributed? Hint % will recieve an A % will recieve a B % will recieve a C % will recieve a D % will recieve an F

The mean of a sampling distribution is smaller than the mean of the underlying population. True or false

Suppose that the diameters of oak trees are normally distributed with a mean of 4.000 feet and a standard deviation of 0.375 feet. What is the probability of sampling a set of 87 oak trees and finding their mean to differ from the population mean by less than 0.1 feet in diameter? Your answer should be from the cumulative normal distribution table.

Suppose that the efficacy of a certain drug is 0.56. Consider the sampling distribution (sample size �=99) for the proportion of patients cured by this drug. What is the mean of this distribution?  What is the standard error of this distribution? Round the answer to three decimal places.

If a sample size is 100 and the population standard deviation is 30 then the standard deviation of the sampling distribution for means is 3.  Is this true or false.

Suppose that the efficacy of a certain drug is 0.52. Consider the sampling distribution (sample size n = 100) for the proportion of patients cured by this drug. What is the mean of this distribution? What is the standard error of this distribution?