Answer:
The Sample Size Need To be at least 114
Step-by-step explanation:
According to the Question,
- Given, A university dean of students wishes to estimate the average number of hours students spend doing homework per week. The standard deviation from a previous study is 6.2 hours.
The Maximum Error(E) is given as 1.5 hours and the standard deviation(σ) is 6.2 hours.
- Now, For 99% Confident the level of value α is 0.01.
α/2 = 0.01/2 ⇒ 0.005
- Thus, From The table, We get that the value of
is 2.58.
Hence, the sample size n can be found as
n = {
}²
n = {2.58 × 6.2}² / 1.5²
n = 113.72 .
So, The Sample Size Need To be at least 114.
Answer:
2x^3 + 9 (if you meant the x to be multiplication)
2x^3 + 9x (if you meant the x to be a variable)
Step-by-step explanation:
Hope this helps!
brainliest?
(::)
Answer:
SU = 30
RS = 27 I believe
Step-by-step explanation:
Hope that helps!
Answer:
A. <em>x</em> = 3, <em>y</em> = 11
Step-by-step explanation:
Inserting these two numbers into the expressions, you get the numbers 9 and 7. These show that the triangles are congruent.
Hope it helps!
Answer:
The probability is;
0.0000003645
Step-by-step explanation:
The probability of packages being early p is 90% = 0.9
The probability of packages being late q will be 1-p = 1-0.9 = 0.1
So the probability of 2 out of 10 random late will be subject to Bernoulli approximation of the Binomial theorem
That will be;
P(X = 2) = 10 C 2 0.9^2 0.1^8
= 0.0000003645
