Answer:
a) 95% confidence interval estimate of the true weight is (3.026, 3.274)
b) 99% confidence interval estimate of the true weight is (2.944, 3.356)
Step-by-step explanation:
Confidence Interval can be calculated using M±ME where
- M is the mean of five successive weightings (3.150)
- ME is the margin of error from the mean
And margin of error (ME) can be calculated using the formula
ME=
where
- t is the corresponding statistic in the given confidence level and degrees of freedom(t-score)
- s is the standard deviation of the random error (0.1)
Using the numbers 95% confidence interval estimate of the true weight is:
3.150±
≈3.150±0.124
And 99% confidence interval estimate of the true weight is:
3.150±
≈3.150±0.206
P=2*(l+w)
p=2l+2w
2w=p - 2l
w= (p-2l)/2
Answer:
216
Step-by-step explanation:
9 * 6 = 54
54 * 8 = 432
432/2 = 216 is the answer
Answer:
B(2,3),C(2,-3)
Step-by-step explanation:
On y-axis symmetry有手就行