For either interval, the value of the sample mean is given by the average of the lower and upper bound of the confidence interval. Since both intervals were constructed by using the same sample, both values should be equal.

For the first interval:

$M=\frac{114.9 + 115.7}{2} \\M=115.3\ hertz$

For the second interval:

$M=\frac{114.6 + 116.0}{2} \\M=115.3\ hertz$

4 0

2 years ago

Find the roots of f(x)=2x^2+7x+3 by using the quadratic formula

Oksana_A [137]

Answer:

f(x) = 2 ( x + 7/4)2 - 25/8

Step-by-step explanation:

4 0

2 years ago

Determine the domain and range of the relation {(3, 8), (3, 2), (5, 2), (6, 1), (9,1)} I don't understand domain and range. Help

VLD [36.1K]

Answer:

The domain is the first number in each set so like the domain is: 3,5,6,9

6 0

2 years ago