Step-by-step explanation:
Mean = 81740
Standard deviation = 4590
Sample size = 15
Alpha level = 1-0.95 = 0.05
Df = 15-1 = 14
Critical value:
alpha/2 = 0.05/2 = 0.05
t0.025
t critical value = 2.145
Margin of error ME
2.145 x 4590/√15
2.145 x 4590/3.873
ME = 2542.09
Confidence interval
Lower CI = mean - ME
= 81740-2542.09
= 79197.91
Upper CI = mean + ME
= 81740+2542.09
= 84282.09
[ 79197.91, 84282.09]
B.
Using excel, exact answer for CI
Lower limit = 79198.142724212173
Upper limit = 84281.8572757827
C.
The assumptions to be made from the population are that
1. Samples are random
2. These samples are gotten from an approximately normal distribution
<h3>Hey Mate,.</h3>
<h3><u>Answer :- </u></h3>
• 1 / 3
<h3><u>Explanation :- </u></h3>
<u>As </u><u>we </u><u>know</u><u> </u><u>that </u><u>,</u><u> </u>
If a dilation produces a smaller figure then ,
0 < Scale factor < 1 .
So then ,
Case 1 ) -2 => The scale factor must be a positive number .
Case 2 ) 1 / 3 => 0 < 1/3 < 1 => Is a possible scale factor .
Case 3 ) 1 => This scale factor does not produce a smaller figure , It produces the same figure .
Case 4 ) 4 => This scale factor produces a larger figure .
<h3>• Hence, the answer is 1/3 .</h3>
<h3>Hope this helps you...</h3>
<h3>#Carry on learning#....</h3>
<h3>Have a nice day ahead...! </h3>
Answer:
1/7x or 1/7
Step-by-step explanation:
the equation for slope is
y2-y1 over x2 minus x1, so basically it means that you find the second x which in this case is 12 and subtract the first x which is 5. 12-5 is 7
You also do -7 minus -6 for the y2-y1 stuff so it is -7 plus 6 cuz the double - signs cancel out to positive.
-7 + 6 is 1
1 over 7 is 1/7
Step-by-step explanation:
the slope that is PARALLEL to the equation of the line y = -1/2x+6 is -1/2.
and the slope that is PERPENDICULAR to the equation of the line y = -1/2x+6 is :
-1 ÷ -½ = 2
Answer:
It might be B
Step-by-step explanation:
