Answer:
20
Step-by-step explanation:
multiply 4 by 5 to get 20
or add 4+4+4+4+4=20
The answer is 5.5
The standard deviation (sd or σ) of the sample mean difference is:
sd = √(sd₁²/n₁ + sd₂²/n₂)
For the population A:
sd₁ = 17.6
n₁ = 25
For the population B:
sd₂ = 21.2
n₂ = 30
Hence:
sd = √(sd₁²/n₁ + sd₂²/n₂)
= √(17.6²/20 + 21.2²/30)
= √(309.76/20 + 449.44/30)
= √(15.49 + 14.98)
= √(30.47)
= 5.5
Answer:
b. No
Step-by-step explanation:
Binomial approximation to the normal:
Binomial distribution has n trials, with p probability.
If
and , it can be approximated to the normal distribution.
Assume the probability that a given student will not pass their college placement exam is 98%.
This means that
134 students:
This means that
Necessary conditions:
Since the necessary condition n(1-p) < 10 is not satisfied, the answer is No, given by option b.
Oh yeah mr boy atleast 20 characters
Answer:
False
Step-by-step explanation:
I'm pretty sure it's false, sry if it's not