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3 years ago

What is the average? 2 3 6 5

Mathematics

2 answers:

I am Lyosha [343]3 years ago

7 0

Answer:

Step-by-step explanation:

To find average you must add up all of the numbers and then divide by the amount of numbers there are

2+3+6+5= 16

there are 4 numbers, so you do 16/4

16/4 = 4

Hope this helps!!

-Ketifa

Allushta [10]3 years ago

3 0

Answer:

Step-by-step explanation:

2+3+6+5 is 16 and since there are 4 numbers 16/4 is 4

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Andy has $261.81 left in his bank account after buying a tennis racquet and a can of tennis balls. The racquet cost $76.58 and t

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Answer:

B. $352.00

Step-by-step explanation:

76.58+13.61=90.19

261.81+90.19=352

Answer: $352

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3 years ago

The sum of two numbers is 40. Two times the smaller number is 17 more than the larger. Find the numbers

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X+y=40
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4 years ago

A simple random sample from a population with a normal distribution of 98 body temperatures has x =98.90 °F and s =0.68°F. Const

Ludmilka [50]

Answer:

$0.609 \leq \sigma \leq 0.772$

And the best conclusion would be:

D. This conclusion is safe because 1.40 °F is outside the confidence interval.

Step-by-step explanation:

1) Data given and notation

s=0.68 represent the sample standard deviation

$\bar x =98.90$ represent the sample mean

n=98 the sample size

Confidence=90% or 0.90

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:

$df=n-1=98-1=97$

Since the Confidence is 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , and we can use excel, a calculator or a table to find the critical values.