Answer:
The correct answer is - 97.74%.
Step-by-step explanation:
Given:
sample mean = 281
Std Dev = 47 ==> Sample
Std Dev (s) = std dev/sqrt(n) = 6.0677
Solution:
Find : P( x > 268 )
z = ( x - u )/s = ( 268 - 281 )/6.0677
= -1.9558
then, P( x > 270) = P( Z > -1.9558)
= P( Z <1.9558)
= 0.9747
change into percentage:
= 97.471%
Answer:
56q2 - 10q
Step-by-step explanation:
1. the function is given h(x) = 7x + 4q
2. we should put (8q2 - 2q) instead of x
3. we should write when x = 8q2 - 2q
then it will be h(8q2 - 2q)= 7(8q2 - 2q) + 4q
4. then we should multiply the elements in the bracket with 7 then it will be 56q2 - 14q + 4q
5. then we should substract -14q + 4q then it will be -10
6. and answer comes 56q2 - 10q
I assumed that 3 households are sampled.
Now, is the number in each of these households equal to 1, 3 and 8 people?
Next, the question says, samples of n=2 are randomly selected (with replacement) from these 3.
So are sample space is
11
13
31
33
18
81
38
88
83
88
This is done 9 times.
Is that how you understand the problem?
When they select the household with only 1 person, the variance is 0
When they select the household with 8 people, they variance will be from a discrete uniform distribution
Similarly for household with 3 individuals.
The amplitude is 5, so the range would be y must be between or equal to 5 and -5
Hope this helps!
Step-by-step explanation:
The product of <em>a</em> and <em>b</em> is equal to <em>a · b.</em>
Let <em>w - width</em> and <em>l - length</em>, then the product of the width and the lenght is
<em>w · h = wh</em>