I need help with number 18

Mathematics

1 answer:

Zina [86]3 years ago

3 0

Answer:

Step-by-step explanation:

You might be interested in

Please help me what is the measure of it ?

never [62]

Answer:

115

Step-by-step explanation:

A supplementary line equals 180

You have to subtract 65 by 180

which gives you 115

7 0

3 years ago

The Pythagorean Theorem can only be used with which type of triangle?

valkas [14]

Right triangle because a2 + b2 = c2

4 0

3 years ago

How do you figure it out in steps 3r+n^2-r+5-2n+2

Katyanochek1 [597]

If you need to simplify the equation it would be:
$n^{2}$ +2r-2n+7
If not sorry..
Hope This Helps!

8 0

4 years ago

The sugar content of the syrup in canned peaches is normally distributed. A random sample of n = 10 cans yields a sample standar

Serggg [28]

Answer:

The 95% confidence interval is given by:

3.30<σ<8.76

Step-by-step explanation:

1) Data given and notation

s=4.798 represent the sample standard deviation

$\bar x$ represent the sample mean

n=10 the sample size

Confidence=95% or 0.95

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population mean or variance lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

The Chi Square distribution is the distribution of the sum of squared standard normal deviates .

2) Calculating the confidence interval

The confidence interval for the population variance is given by the following formula:

$\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \leq \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}$

The next step would be calculate the critical values. First we need to calculate the degrees of freedom given by:

$df=n-1=10-1=9$

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a tabel to find the critical values.