In the box there are 20 toys, but 5 of them are broken. Randomly one after another 2 toys are taken out. What are the chances th
at the 2 taken out toys are broken ?
A - 1/19
B - 3/4
C - 7/16
D - 3/10
A - 1/19
B - 3/4
C - 7/16
D - 3/10
1 answer:
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Answer:
0.077994
Step-by-step explanation:
Given that the owner of a local nightclub has recently surveyed a random sample of n = 250 customers of the club.
(Right tailed test)
Sample size =
Sample mean = 30.45
Mean difference =
Sample std dev s = 5
Sample std error =
Test statistic = Mean diff/std error =
Since population std deviation is not know we use t test
p value =