Given:
n = 27, sample size
df = n-1 = 26, degrees of freedom
xb = 11.8, sample mean
s = 2.3, sample standard deviation.
Because population statistics are not known, we should use the Student's t-distribution.
At 99% confidence interval, the t-value = 2.779 (from tables).
The confidence interval is
11.8 +/- 2.779*(2.3/√(27)) = 11.8 +/- 1.23 = (10.57, 13.03)
Answer: (10.6, 13.0) to the nearest tenth
Multiply both sides by 39 to get 13=M
I will find comission
7% of 210000
percent means parts out of 100
7%=7/100
7/100 times 210000=1470000/100=14700
comission is $147000
Answer:
15 sandwiches per half hour
Step-by-step explanation:
