Answer:
A) probability that at least x of them will require repairs is less than 0.5 is 4
Step-by-step explanation:
sample size, n = 20
p = success probability of toaster = 0.2
q = failure probability of toaster =1- p = 1- 0.2 =0.8
mean, , μ = n * p = 20 * 0.2 = 4
standard deviation, 
a) the probability that at least some of them require repairs < 0.5.
for 
value of z = 0
we know 
from z table
X = 4
B) SECOND PART IS INCOMPLETE { DATA IS INCOMPLETE}
Answer:
And replacing we got:
And for this case the standard error assuming normality would be given by:
And replacing we got:
Step-by-step explanation:
For this problem we know the following notation:
represent the sample size selected
represent the number of airplane travelers who after a flight would fly that airline again
The estimated proportion for this case would be:
And replacing we got:
And for this case the standard error assuming normality would be given by:
And replacing we got:
The correct answer is A.
Exponents should be multiplied when the expression is in the form (x^a)^b. In this case, the result is always equal to x^(a*b).
For B and D, the exponents should be added since the base is the same. Exponents in C should be subtracted since they are divided and cancel each other out
Answer:
yes.
honestly, I didn't really do all the math.
3 in 18 minutes, a little better than 3 in 20 minutes. that translates to 9 in an hour, with 6 minutes left over.
3 hours of that (3×9) is the 27. with 6 minutes per hour left over, for a total of 18 minutes.
the teacher has time to grade the tests, get a cup of coffee, and take a few minutes to wonder why she didn't go into an easier line if work.
<span>It means that it is pertaining to a type of math or in this case Geometry, for the use of its method.
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