HELP PLEASE

I’m a small library, there are 5 nonfiction books. There are 130 nonfiction books. How many fiction books are there?

UkoKoshka [18]

Answer: 125 fiction books

5 0

3 years ago

Read 2 more answers

2x + y = 8 x + y = 4 The lines whose equations are given intersect at

aalyn [17]

The lines whose equations are given intersect at. (4, 0)

7 0

3 years ago

A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms

MissTica

Answer:

$t = \frac{39.5-30.6}{\frac{6.6}{\sqrt{25}}}= 6.74$

The degrees of freedom are given by:

$df =n-1= 25-1=24$

Now we can calculate the p value with the following probability:

$p_v = 2*P(t_{24}>6.74)= 5.69x10^{-7}$

And for this case since the p value is lower compared to the significance level $\alpha=0.05$ we can reject the null hypothesis and we can conclude that the true mean for this case is different from 30.6 at the significance level of 0.05

Step-by-step explanation:

For this case we have the following info given:

$\bar X = 39.5$ represent the sample mean

$s =6.6$ represent the sample deviation

$\mu = 30.6$ represent the reference value to test.

$n = 25$ represent the sample size selected

The statistic for this case is given by:

$t =\frac{\bar X -\mu}{\frac{s}{\sqrt{n}}}$

And replacing we got:

$t = \frac{39.5-30.6}{\frac{6.6}{\sqrt{25}}}= 6.74$

The degrees of freedom are given by:

$df =n-1= 25-1=24$

Now we can calculate the p value with the following probability:

$p_v = 2*P(t_{24}>6.74)= 5.69x10^{-7}$

And for this case since the p value is lower compared to the significance level $\alpha=0.05$ we can reject the null hypothesis and we can conclude that the true mean for this case is different from 30.6 at the significance level of 0.05

3 0

3 years ago

A golf store purchases a set of clubs at a wholesale price of $250. Mr. Edmond learned that the clubs were marked up 200%. Is it

Mandarinka [93]

Answer:

Yes, it is possible to have a percent increase greater than 100%. The retail price of the clubs is $750

Step-by-step explanation:

Because the clubs were marked up 200%, we need to add 200% to 100%.

Then to find the retail price, we have to multiply 300%(3) by the wholesale price of $250.

Retail price = 3(250) =750

Therefore, the retail price is $750

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