Answer:
The proportion follows normal distribution,
Mean u = 0.39
standard deviation σ = 0.0218
Step-by-step explanation:
Solution:-
- Lets assume the population proportion ( p ) to be the percentage of adult Americans who believe that marriage is now obsolete.
- We will check for normality:
Lets take, p^ = p (Mean proportion of the distribution)
- The condition of normality,
n*p*( 1 - p ) ≥ 10
Where, n : The sample size taken.
500*0.39*( 1 - 0.39 ) = 500*0.39*( 0.61 )
118.95 ≥ 10
- Hence, with the testing statistics the condition for normality are validated. Hence, the distribution for proportion of adult americans who believe that marriage is now obsolete follows a normal distribution.
- The parameters of the distribution are:
Mean : u = p^ = p = 0.39
Standard deviation σ = 
= 
Answer:
See the attached.
Step-by-step explanation:
In a bar graph, the length of the bar signifies the size of the data item. A spreadsheet program can automate the process, but you can do the job almost as easily by hand.
Answer: B.) 62
sum of interior angles of quadrilateral = 360
lines DB and DA are tangent to the circle, so they're at a right angle to the lines OB and OA respectively. so to find mBOA = 360 - 56 - 90 - 90
so mBOA = 124
mBCA = (1/2)mBOA
mBCA = (1/2)(124)
mBCA = 62°
Answer:
Brand A is the better buy
Step-by-step explanation:
bag Which is the better buy?
Step one
Brand A: $5 for 80 pounds of sand
Let us find the unit cost
Unit cost =5/80
=$0.0625 per pound
Brand B: $14 for 175 pound
The unit cost is
=14/175
=$0.08 per pound
let the solution be 
let the solutions be a = 3, b = 1
is the equation with consistent value.
