Answer:
Step-by-step explanation:
Answer:
The third is quartile is 0.67
Step-by-step explanation:
<u>Explanation</u>:-
- The Z- score of the normal distribution is = x-μ /σ
finding the z-score of the third quartile
- The variance σ^2 = 0.25 is small the curve of the curve is tall and thin, concentrated the value 'μ'
- The standard normal distribution of the first quartile is -0.67 ( using 0.25)
- The third quartile is 0.67. this means that for normally data, one half of the data is with in 2/3 of a standard deviation unit of the mean.
Answer:
The number will be -63
Step-by-step explanation:
Here, we want to give the number of the chosen 25th student
We can see that the numbering follows an arithmetic sequence where a = 9 and d which is the common difference is (6-9) = -3
Mathematically, we can calculate the nth term using the equation below;
Tn = a + (n-1)d
in this case, n = 25, a = 9 and d = -3
So we have
Tn = 9 + (25-1)-3
Tn = 9 -3(24)
Tn = 9-72
Tn = -63
