Answer:
Step-by-step explanation:
We want to determine a 90% confidence interval for the true population mean textbook weight.
Number of sample, n = 22
Mean, u = 64 ounces
Standard deviation, s = 5.1 ounces
For a confidence level of 90%, the corresponding z value is 1.645. This is determined from the normal distribution table.
We will apply the formula
Confidence interval
= mean ± z ×standard deviation/√n
It becomes
64 ± 1.645 × 5.1/√22
= 64 ± 1.645 × 1.087
= 64 ± 1.788
The lower end of the confidence interval is 64 - 1.788 = 62.21 ounces
The upper end of the confidence interval is 64 + 1.788 = 65.79 ounces
Therefore, with 90% confidence interval, the true population mean textbook weight is between 62.21 ounces and 65.79 ounces
Answer:
salini -= 5 years
mother = 40years
Step-by-step explanation:
then you equate the values of x
2,5,8,11,14 because it’s going by 3’s.
First I would find out how many inches are burned away in 1 hour, 1 1/2 inches. then u multiply 3/4 by 4 to get 3. then u subtract the 3 by 10 to get 7 inches. the answer is 7 inches.
If you replace every x with -x and evaluate
if the resulting function is
1. the same as te original, it is even function
2. negative of the original, it s odd
f(-x)=-3(-x)^4-2(-x)-5
f(-x)=-3x^4+2x-5
compared to original
-3x^4-2x-5
it is nither the same or the exact negative
answer is neither
