Answer:
82
Step-by-step explanation:
multiply 5 x 2 and you get ten, that is the total decrease over five hours. Subtract ten from 92 and you get 82.
The answer is y=-2x+3 (the last choice) because perpendicular lines mean the negative reciprocal of the original slope. (flip fraction and make it the opposite sign) and the y intercept stays the same
Answer:
where is the table
Step-by-step explanation:
It would be e, because it went down 10 instead of 5
Answer:
d. 0.0023
Step-by-step explanation:
Calculation for the probability of getting a sample average of 1.8 or less
Using this formula
z score =(X-mean)/Standard errror
Where,
Standard error =Standard deviation/√(n)
Let plug in the formula
P(Xbar<1.8)=P(Z<(1.8 hours per day -2.2 hours per day)/(2 hours /√(200))
P(Xbar<1.8)=P(Z<-0.4/(2/14.14))
=P(Z<-0.4/0.1414)
=P(Z<-2.83)
Now let find the Z score of P(Z<-2.83) using the z table
P=0.0023
Therefore the probability of getting a sample average of 1.8 or less is:0.0023
