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)
You might be interested in
Answer:
15 yds
Step-by-step explanation:
12 in = 1ft
3 ft = 1yd
to convert
540 in * 1ft/12 in * 1yd /3 ft = (540 * 1 * 1)/ (12*3) = 540/36 =15 yds
all the units canceled except for yds
1+68
2+67
3+66
4+65
5+64
6+63
7+62
8+61
9+60
Piggy bank. All banks are FDIC insured
0
:
Step-by-step explanation:
Just solve the equation 2x-5
