Answer:
ion know
Step-by-step explanation:
<h2>
Answer with explanation:</h2>
The confidence interval for population mean is given by :-
(1)
, where
= sample mean
z* = critical value.
SE = standard error
and
,
= population standard deviation.
n= sample size.
As per given , we have


n= 15
It is known that ring diameter is normally distributed.
By z-table ,
The critical value for 95% confidence = z*= 1.96
A 99% two-sided confidence interval on the true mean piston diameter :
(using (1))

[Rounded to three decimal places]
∴ A 99% two-sided confidence interval on the true mean piston diameter = (74.020, 74.022)
By z-table ,
The critical value for 95% confidence = z*= 1.96
A 95% lower confidence bound on the true mean piston diameter:
(using (1))
[Rounded to three decimal places]
∴ A 95% lower confidence bound on the true mean piston diameter= 74.020
1. False
2. True
3. False
4. False??
Answer:
4.2 grams in total
Step-by-step explanation:
<h2>
Remember to line up the decimal point when adding numbers that contain decimals.</h2>
3.7
+0.5
_______
4.2
Answer:
56,149 would be left over
Step-by-step explanation:
56,941-792=56,149