Answer:
Step-by-step explanation:
0.25 = 25/100=1/4
Answer:
Step-by-step explanation
In the form ax^2+bx+c
a x c should equal two factors of b
However, in this equation
1 x 19 has no factors that = 10
so you must use the Quadratic Formula which is,
x =
so the answer should be
x =
x =
x = and x =
Answer:
Step-by-step explanation:
The confidence interval for the population mean x can be calculated as:
Where x' is the sample mean, s is the population standard deviation, n is the sample size and is the z-score that let a proportion of on the right tail.
is calculated as: 100%-99%=1%
So,
Finally, replacing the values of x' by 308, s by 17, n by 15 and by 2.576, we get that the confidence interval is: