Thirty-nine randomly selected students in a college took the stat final. The sample mean was 68.9 with standard deviation 8.3 .
The 99% confidence interval estimate of the population mean is:
1 answer:
Answer:
(65.5775 , 72.2225)
Step-by-step explanation:
Confidence Interval is the range around sample mean, likely to consist the population parameter.
Formula = x' <u>+</u> z (s / √n)
= 68.9 <u>+</u> 2.5 (8.3 / √39)
= 68.9 <u>+</u> 3.3225
(65.5775 , 72.2225)
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LCD is 12.
12 goes into 12 once. 12x1=12
12 goes into 60 five times. 12x5=60
Answer:
6/5
Step-by-step explanation:
5x + 14 = 20
Subtract 14 from 20
5x = 6
Divide both sides by 5
x = 6/5
Answer:
It's 81
Step-by-step explanation:
2^5 is 2*2*2*2*2 or 32
7^2 is 7*7 or 49
Add them together... 81
(-7)*(2/5 + (-3/7))
= -14/5 + 3
=1/5
Answer:
6.35
Explanation:
7 divided by 20 is 0.35+6= 6.35
