Answer:
a)= 2
b) 6.324
c) P= 0.1217
Step-by-step explanation:
a) The mean of the sampling distribution of X`1- X`2 denoted by ux`-x` = u1-u2 is equal to the difference between population means i.e = 2 ( given in the question)
b) The standard deviation of the sampling distribution of X`1- X`2 ( standard error of X`1- X`2) denoted by σ_X`1- X`2 is given by
σ_X`1- X`2 = √σ²/n1 +σ²/n2
Var ( X`1- X`2) = Var X`1 + Var X`2 = σ²/n1 +σ²/n2
so
σ_X`1- X`2 =√20 +20 = 6.324
if the populations are normal the sampling distribution X`1- X`2 , regardless of sample sizes , will be normal with mean u1-u2 and variance σ²/n1 +σ²/n2.
Where as Z is normally distributed with mean zero and unit variance.
If we take X`1- X`2= 0 and u1-u2= 2 and standard deviation of the sampling distribution = 6.324 then
Z= 0-2/ 6.342= -0.31625
P(-0.31625<z<0)= 0.1217
The probability would be 0.1217
A) x=4
B) x= -3
C) x= -1/6
D) x=24
(15,-10) (17,2)
(2+10)/(17-15)= 12/2 = 6
The slope is 6
Answer:
Step-by-step explanation:
Given
Required
Determine the hours of practice over 6 days
First, we calculate the hours for the given 3 days.
The hours of practice for the other three days is also 52 hours.
So, the total is:
Answer:
Step-by-step explanation:
1125*3=3375
The first diagram shows how to multiply each number separately instead of the normal way. It shows you in sections instead one line.
The question asks if you started with the first "1" in 1125, will the answer be different. The answer is no.
since the hundred number given, when multiplied by the 3, will not result in "carrying the 1 over to the thousand place, the answer will not change.
