Answer:
yes I think I'm new to this but I think that's a yes
Answer:
Step-by-step explanation:
x= 1 over 4y-2
Answer:
the probability that the sample variance exceeds 3.10 is 0.02020 ( 2,02%)
Step-by-step explanation:
since the variance S² of the batch follows a normal distribution , then for a sample n of 20 distributions , then the random variable Z:
Z= S²*(n-1)/σ²
follows a χ² ( chi-squared) distribution with (n-1) degrees of freedom
since
S² > 3.10 , σ²= 1.75 , n= 20
thus
Z > 33.65
then from χ² distribution tables:
P(Z > 33.65) = 0.02020
therefore the probability that the sample variance exceeds 3.10 is 0.02020 ( 2,02%)
Answer:
your answer is proably 15 i dont really know
Step-by-step explanation:
Answer:
35$
Step-by-step explanation:
1/4 of 60 is = 15 and 1/4 of 80 is = 20
Add 20 and 15 = 35$
