each of the following three data sets represents the iq scores of a random sample of adults. iq scores are known to have a mean and median of 100. for each data set, determine the sample standard deviation. then recompute the sample standard deviation assuming that the individual whose iq is 105 is accidentally recorded as 150. for each sample size, state what happens to the standard deviation. comment on the role that the number of observations plays in resistance

Suppose the radius of a circle is 16. what issuppose the radius of a circle is 16. what is its circumference its circumference

The function models the number of accidents per 50 million miles driven as a function

Determine if the following statement is true or false. the normal curve is symmetric about its​ mean, mu. choose the best answer below. a. the statement is false. the normal curve is not symmetric about its​ mean, because the mean is the balancing point of the graph of the distribution. the median is the point where​ 50% of the area under the distribution is to the left and​ 50% to the right.​ therefore, the normal curve could only be symmetric about its​ median, not about its mean. b. the statement is true. the normal curve is a symmetric distribution with one​ peak, which means the​ mean, median, and mode are all equal.​ therefore, the normal curve is symmetric about the​ mean, mu. c. the statement is false. the mean is the balancing point for the graph of a​ distribution, and​ therefore, it is impossible for any distribution to be symmetric about the mean. d. the statement is true. the mean is the balancing point for the graph of a​ distribution, and​ therefore, all distributions are symmetric about the mean.