Plato
a school conducted a survey to find out which games students enjoy watching the most. the table below contains the results of the survey.

grade basketball baseball football soccer tennis other marginal totals
elementary school 51 18 26 32 4 6 137
middle school 50 24 44 34 7 18 177
high
school 42 17 58 36 11 24 188
marginal totals 143 59 128 102 22 48 502

what is the relative frequency of middle school students among students who watch soccer the most?

a.)6.77%

b.)19.21%

c.)57.63%

d.)33.33%

Given the function f(x) = 3x + 1, evaluate f(a + 1). a. 3a + 1 b. a + 2 c. 3a + 4

Dexter read 11 science fiction books and 5 history books. lena read 9 science fiction books and 4 history books. compare the students’ ratios of science fiction books to history books. 1. determine the ratios’ form:    science fiction books to history books 2. write the ratios as fractions:    dexter: 115; lena: 94 3. rewrite with a common denominator. 4. compare. 5. answer the question. determine which shows the correct comparison of the ratios for this problem.

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.