Dana surveyed students in her class. She found that 8 earned an A, 6 earned a B, 4 earned a
1 answer:
Answer:
0.4
Step-by-step explanation:
Given:
Dana found that 8 students earned an A, 6 students earned a B, 4 students earned a C, and 2 students earned a D on the last science test.
To find:
the experimental probability that the student would have earned an A in the test
Solution:
Probability refers to the chances of occurrence of some event.
Number of students who earned an A in the test = 8
Total number of students = 8 + 6 + 4 + 2 = 20
The experimental probability that the student would have earned an A in the test = Number of students who earned an A in the test / Total number of students =
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Answer:
Step-by-step explanation:
x, height of men is N(69, 2.8)
Sample size n =150
Hence sample std dev =
Hence Z score =
A) Prob that a random man from 150 can fit without bending
= P(X<78) = P(Z<3.214)=1.0000
B) n =75
Sample std dev =
P(X bar <72) = P(Z<9.28) = 1.00
C) Prob of B is more relevent because average male passengers would be more relevant than a single person
(D) The probability from part (b) is more relevant because it shows the proportion of flights where the mean height of the male passengers will be less than the door height.