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3 years ago

What is the reciprocal of 6/9

Mathematics

2 answers:

galina1969 [7]3 years ago

5 0

Answer:

9/6 but if you get it wrong it is 3/2

Step-by-step explanation:

A reciprocal means that you put the numerator where the denominator is and the denominator where the numerator is. If there is no denominator, it is one.

for example 3/5 has a reciprocal of 5/3

4 has a value of 4//1 and the reciprocal is 1/4

For your question 6/9 has a reciprocal of 9/6

The numerator and denominator can each be divided by 3.

You get 3/2

The question is what is the answer. I would pick 9/6 but I'm almost sure the computer is going to pick 3/2.

neonofarm [45]3 years ago

3 0

Answer:

Step-by-step explanation:

Remember that, to find the reciprocal of a fraction, just swap the numbers. So the reciprocal of 6/9 is 9/6.

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Read 2 more answers

A student wanted to construct a 95% confidence interval for the mean age of students in her statistics class. She randomly selec

VMariaS [17]

Answer:

$19.1-3.355\frac{1.5}{\sqrt{9}}=17.42$

$19.1+3.355\frac{1.5}{\sqrt{9}}=20.78$

And the best option would be:

C. [17.42,20.78]

Step-by-step explanation:

Previous concepts

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 means 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.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X=19.1$ represent the sample mean

$\mu$ population mean (variable of interest)

s=1.5 represent the sample standard deviation

n=9 represent the sample size

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=9-1=8$

Since the Confidence is 0.99 or 99%, the value of $\alpha=0.01$ and $\alpha/2 =0.005$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.005,8)".And we see that $t_{\alpha/2}=$