Solve for X X/5 = 15
1 answer:
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Answer:
Lower confidence limit = 20.191
Step-by-step explanation:
Sample mean; x' = 22
Sample standard deviation; s = 5.5
Sample size; n = 50
Confidence interval = 99%
Since sample size > 30, we will use the formula;
CI = x' ± zs/√n
Where;
x' is sample mean
s is sample standard deviation
n is sample size
z is z-value of the confidence interval
From the table attached, z for 99% = 2.3263
Thus;
CI = 22 ± (2.3263 × 5.5)/√50
CI = 22 ± 1.809
CI = 23.809 or 20.191
Lower confidence limit = 20.191
The first equation matches the last graph.
The second equation matches the first graph.
The last equation matches the second graph.
(I can’t upload the other two graphs but let me know if you want me to put the process, step by step)
The second equation matches the first graph.
The last equation matches the second graph.
(I can’t upload the other two graphs but let me know if you want me to put the process, step by step)