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2 years ago

If Joey has 6 fish and 1/3 of them are striped, how many are striped?

Mathematics

2 answers:

melisa1 [442]2 years ago

4 0

Answer:

Step-by-step explanation:

romanna [79]2 years ago

3 0

2 of Joey’s fish are striped.
Explanation:
6•1/3=x
Turn 6 into a fraction by putting it over 1.
6/1•1/3=6/3
Now after multiplying those fractions together we can simplify the result by dividing the top of the fraction by the bottom.
6 divided by 3 is 2.

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83 random samples were selected from a normally distributed population and were found to have a mean of 32.1 and a standard devi

arlik [135]

Answer:

$\frac{(82)(2.4)^2}{104.139} \leq \sigma^2 \leq \frac{(82)(2.4)^2}{62.132}$

$4.525 \leq \sigma^2 \leq 7.602$

Now we just take square root on both sides of the interval and we got:

$2.127 \leq \sigma \leq 2.757$

Step-by-step explanation:

Information given

$\bar X=32.1$ represent the sample mean

$\mu$ population mean (variable of interest)

s=2.4 represent the sample standard deviation

n=83 represent the sample size

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 degrees of freedom given by:

$df=n-1=8-1=7$

The confidence level 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.

The excel commands would be: "=CHISQ.INV(0.05,82)" "=CHISQ.INV(0.95,82)". so for this case the critical values are:

$\chi^2_{\alpha/2}=104.139$

$\chi^2_{1- \alpha/2}=62.132$

The confidence interval is given by:

$\frac{(82)(2.4)^2}{104.139} \leq \sigma^2 \leq \frac{(82)(2.4)^2}{62.132}$

$4.525 \leq \sigma^2 \leq 7.602$

Now we just take square root on both sides of the interval and we got:

$2.127 \leq \sigma \leq 2.757$

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3 years ago

You roll a six-sided die twice. What is the probability of landing

GalinKa [24]

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2 years ago

What is the standard form for four million two hundred sixteen thousand nintety

lorasvet [3.4K]

The standard form is 4,216,090.

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3 years ago

I am thinking of a number.

alex41 [277]

Answer:

x = 25

Step-by-step explanation:

Because the give the same number they are equal!

x = the number

10x - 106 = 6x - 6

4x = -6 + 106

4x = 100

x = 25

Thanks for the question! :)

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3 years ago

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Minchanka [31]

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1 year ago

If Joey has 6 fish and 1/3 of them are striped, how many are striped?​

If Joey has 6 fish and 1/3 of them are striped, how many are striped?