Answer:
The answer is 51,200 in².
Step-by-step explanation:
(4x40)x(8x40)=51,200
A. -13
B. -45
C. 20
D. 84
E. 4
F. -4
G. -7
H. 48
Answer:
t = 300
Step-by-step explanation:
ur welcome
X=14
3 times 14 is 42-13 is 29
Answer:
The 95% confidence interval for the proportion of all boards in this shipment that fall outside the specification is (1.8%, 6.2%).
Step-by-step explanation:
Let <em>X</em> = number of boards that fall outside the most rigid level of industry performance specifications.
In a random sample of 300 boards the number of defective boards was 12.
Compute the sample proportion of defective boards as follows:

The (1 - <em>α</em>)% confidence interval for population proportion <em>p</em> is:

The critical value of <em>z</em> for 95% confidence level is,

*Use a <em>z</em>-table.
Compute the 95% confidence interval for the proportion of all boards in this shipment that fall outside the specification as follows:

Thus, the 95% confidence interval for the proportion of all boards in this shipment that fall outside the specification is (1.8%, 6.2%).