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Answer with explanation:</u></h2>
The confidence interval for population mean (when population standard deviation is unknown) is given by :-
, where n= sample size
= Sample mean
s= sample size
t* = Critical value.
Given : n= 25
Degree of freedom : 
Significance level for 98% confidence interval : 
Using t-distribution table ,
Two-tailed critical value for 98% confidence interval :
⇒ The critical value that should be used in constructing the confidence interval = 2.4922
Then, the 95% confidence interval would be :-
Hence, the 98% confidence interval for the mean repair cost for the dryers. = 
Answer:
A
Step-by-step explanation:
When a slope is undefined, it is always x = ?
The point (-5, -8) tells us that x = -5
Option A also has a point with x = -5
A and D
should be the answers.
×
To multiply, you multiply across. So it would be 3×1=3 and 10×6=60
Which will result in
but in order to simplify it, you find a common factor. The common factor is 3. 3÷3=1 and 60÷3=20
The answer is
Answer:1/4x+y=-3
Step-by-step explanation:
You have to move 1/4x to the left side by adding the inverse of 1/4x, -1/4x to each side. Then you have 1/4x+y+3=3. After this you have to use the subtraction property of equality. Then your answer is 1/4x+y=-3
