4. About 10% of people in the United States do not wear a seat belt. Suppose we take a random sample of 180 U. S. residents, and let X= the number of people who do not wear their seat belt.

(A) calculate the mean and standard deviation of the sampling distribution of X

(B) Justify that the distribution of X is approximately normal

(C)Use the normal distribution to calculate the probability that 26 or more individuals in the sample do not wear their seat belt

Analyze the data sets below. data set a 25,25,25,26,26,26,27,28,28,29,30,31,31,32,33,33,34,35,35,35 data set b 25,25,25,26,26,26,26,27,27,27,27,28,28,29,29,30,31,31,32,34 which of the following statement are true? select all that apply. a. data set a is relatively symmetric and data set b is skewed left. b.the means of the data sets are within 3 units from eachother. c.the data sets have the same standard deviation. d.the mean of data set a is 27.95 and the mean of data set b is 30. e. the data set b has a higher standard deviation than data set a. f. the mean and median of data set a are close in value.

An angle that measures between 90 and 180° is called a(,

The sum of two numbers is 12 and their difference is 18 what are the two numbers