4 math statistics questions

If A denotes some event, what does A denote? If P(A) = 0.007, what is the value of P(A)? . . . What does A denote? O A. Event A denotes the complement of event A, meaning that A and A share some but not all outcomes. O B. Event A denotes the complement of event A, meaning that A consists of all outcomes in which event A does not occur. O C. Events A and A share all outcomes. O D. Event A is always unusual. If P(A) =0.007, what is the value of P(A)? P(A) = (Type an integer or a decimal. Do not round.)In an experiment, college students were given either four quarters or a $1 bill and they could either keep the money or spend it on gum. The results are summarized in the table. Complete parts (a) through (c) below. Purchased Gum Kept the Money Students Given Four Quarters 34 13 Students Given a $1 Bill 15 28 a. Find the probability of randomly selecting a student who spent the money, given that the student was given four quarters. The probability is (Round to three decimal places as needed.) b. Find the probability of randomly selecting a student who kept the money, given that the student was given four quarters, The probability is (Round to three decimal places as needed.)Listed below are the numbers of hurricanes that occurred in each year in a certain region. The data are listed in order by year. Find the range, variance, and standard deviation for the given sample data. Include appropriate units in the results. What important feature of the data is not revealed by any of the measures of variation? 2 18 CO 20 N 17 10 The range of the sample data is (Round to one decimal place as needed.) The standard deviation of the sample data is (Round to one decimal place as needed.) The variance of the sample data is (Round to one decimal place as needed.)In an experiment, college students were given either four quarters or a $1 bill and they could either keep the money or spend it on gum. The results are summarized in the table. Complete parts (a) through (c) below. Purchased Gum Kept the Money Students Given Four Quarters 31 14 Students Given a $1 Bill 12 32 a. Find the probability of randomly selecting a student who spent the money, given that the student was given four quarters. The probability is (Round to three decimal places as needed.) b. Find the probability of randomly selecting a student who kept the money, given that the student was given four quarters. The probability is (Round to three decimal places as needed.)