Question

Question 6 (1 point Fill in the following contingency table and find the number of students who both do not watch comedies AND do not watch dramas. watch dramas do not watch dramas Total 36 Students 75 56 watch comedies do not watch comedies Total 64 Select the correct answer below: 067 ● 131 25 31 061

Answer 1

6.

Student	watch dramas	do not watch dramas	Total
watch comedies	36	39	75
do not watch comedies	31	25	56
Total	67	64	131

Number of students who both do not watch comedies and dramas is 25

7.

There are 4 aces in a deck of 52 cards.

Number of ways to draw 2 cards from 52 cards = ⁵²C₂ = 1326

Number of ways to draw 2 aces from 4 = ⁴C₂ = 6

Probability to draw both aces = 6 / 1326 = 0.004524887

8.

Total number of blue or green beads = 11 + 6 = 17

Total number of beads = 7 + 11 + 6 = 24

Probability that the selected bead is blue or green = 17/24

9.

Mean = (6 + 10+9+13+5+5) / 6 = 8

Sample standard deviation = sqrt[ ((6 - 8)² + (10 - 8)² + (9 - 8)² + (13 - 8)² + (5 - 8)² + (5 - 8)² ) / (6 - 1)]

= 3.2