Queenvalentin

10.04.2020 • 

Mathematics

A sociologist studying teen behavior took independent random samples of students from two high schools, F and G. Of the 80 students selected from High School F, 36 indicated they had seen a certain movie. Of the 72 students selected from High School G, 18 indicated they had seen the movie.

Which of the following is the test statistic for the appropriate test to investigate whether there is a difference in population proportions (High School F minus High School G) ?

0.45−0.25/√(0.36)(0.64)(180+172)
A

0.45−0.25/√(0.36)(0.64)(180+72)
B

0.45−0.25/(0.45)(0.25)√1/80+1/72
C

36−180/√(0.45/80 + 0.25/72)
D

36−180/√(0.45 + 0.25/80+72)
E

Ответ:

davidoj13

04.03.2020

Mathematics

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The probability that women will be in four adjacent seats is 0.2.

Step-by-step explanation:

Since six people are there and women will be in four adjacent seats so treating 4 women as a unit.

Now, 2 men and 4 women (1 unit) can be arranged in 3! ways .

The 4 women can be arranged in themselves in 4! ways

so total number of ways = 3!×4!=144

Also the total number of possible arrangement = 6!=720 ways

As per question,

Required Probability= = 0.2

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