Answer:
And the 95% confidence interval would be givne by (65.89; 67.11)
Step-by-step explanation:
For this case we have a 99% confidence interval for the true mean hegiht givne by:
And we can begin finding the mean with this formula:
Now we can estimate the margin of error:
The sample size for this case is 
then the degrees of freedom are given by:
And then we can find a critical value for a 99% of confidence and 143 degrees of freedom using a significance level of 0.01 and we got:
Then the standard error is given by:
Now we can find the other critical value for 95% of confidence and we got:
And the new confidence interval would be given by:
And the 95% confidence interval would be givne by (65.89; 67.11)
Answer:
1107 feets below sea level
Step-by-step explanation:
Given that :
Initial elevation of submarine = 984.6 feets below sea level
Depth of dive from initial elevation = 122.4 feets below sea level
The elevation after the dive :
Initial elevation + depth of dive
984.6 + 122.4
= 1107 feets below sea level
Answer:
the answe is 11
Step-by-step explanation:
Answer: £225
Step-by-step explanation:
Let Sarah's amount be represented by x.
Since Caroline gets three times as much as Sarah, Caroline will get: 3x
Bridget gets twice as much as Caroline, therefore Bridget will get: 2 × 3x = 6x
Sarah = x
Caroline = 3x
Bridget = 6x
Total = x + 3x + 6x = 10x
Caroline's faction is 3/10. We then multiply the fraction by £750. This will be:
= 3/10 × £750
= 0.3 × £750
= £225
Caroline will get £225
-- "Perimeter" means all the way around, all four sides.
-- That's two lengths and two widths.
-- So one length and one width is half of the perimeter.
-- If the perimeter is 16-ft, then one length + one width is 8-ft.
-- If the width is 5-ft, then the length is (8 - 5) = 3-ft.
