Answer:
c. [70.30, 74.70]
Step-by-step explanation:
Confidence interval is a range of values in which there is a specified probability that the value of a parameter lies within that range.
The confidence interval of a statistical data can be written as.
x+/-zr/√n .......1
Given;
Mean gain x = 72.5 cm
Standard deviation r = 4.5 cm
Number of samples n = 16
Confidence interval = 95%
z (at 95% confidence) = 1.96 (from the table)
Substituting the values we have into equation 1;
72.5 +/- 1.96×4.5/√16
72.5 +/- 2.20 cm
[70.30, 74.70]
Therefore, the 95% confidence interval is
[70.30, 74.70] cm
<h2>20% i think thats all i know im kinda dumb so i dont thinks its right sorry</h2>
Answer:
I do not think I am right but it may be no triangle.
<u><em>Answer: 333x and x=333. *The answer must be have positive sign.*</em></u>
Step-by-step explanation:
distributive property: a(b+c)=ab+ac
add numbers.
30+7=37
9*37x
multiply numbers.
9*37=333
<em><u>=333x and x=333</u></em>
Hope this helps!
Thanks!
Have a great day!
Answer:
Arithmetic sequence
Step-by-step explanation:
A sequence is described as an arithmetic sequence when there is a common difference between the numbers
A sequence is a geometric sequence when there is a common ratio between the numbers
12,10,8
10-12= -2
8-10= -2
10/12= 0.83
8/10= 0.8
Hence the sequence is an arithmetic sequence with a common difference of -2