The length of a rectangle is 3 m longer than its width.

Lamar got a 75, 89, 94, 95, 88, 96, 94, 82, 98, and 96 on his science tests last quarter. What is the mean absolute deviation of

Alik [6]

The answer to this is 5 ( i think )

4 0

2 years ago

Read 2 more answers

I am confused with everything

notsponge [240]

I think it's x^3+2x^2-4

5 0

3 years ago

HELP ME

zhuklara [117]

Answer:

$127.60

Step-by-step explanation:

If Lisa bought 30 shares of stock at $54.02 per share, total cost price will be:

30×$54.02

= $1620.6

If she then sold her shares at $58.19 per share, her total selling price will be:

30×$58.19

= $1745.7

Profit = selling price - cost price

Profit = $1745.7-$1620.6

Profit = $125.1

If her broker charges a 2% commission for all transactions, her total charge will be:

2% of $125.1

= $2.50

Her net gain = profit + broker's charge

= $125.1+$2.50

= $127.60

7 0

3 years ago

14. Give the inequality –5 4 -3 -2 -1 0 1 2 3 4 5

Morgarella [4.7K]

Answer:

You find if their less than or greater than

Step-by-step explanation:

when dividing or multiplying negative numbers switch sign.

6 0

3 years ago

A business school has a goal that the average number of years of work experience of its MBA applicants is more than three years.

gizmo_the_mogwai [7]

Answer:

$z=\frac{3.1-3}{\frac{2.449}{\sqrt{47}}}=0.280$

$p_v =P(z>0.280)=0.390$

If we compare the p value and the significance level assumed $\alpha=0.01$ we see that $p_v>\alpha$ so we can conclude that we have enough evidence to fail reject the null hypothesis, so we can't conclude that the height of men actually its NOT significant higher than 0.3 at 1% of signficance.

Step-by-step explanation:

Data given and notation

$\bar X=3.1$ represent the sample mean

$\sigma=\sqrt{6}$ represent the sample standard deviation for the sample

$n=47$ sample size

$\mu_o =3$ represent the value that we want to test

$\alpha$ represent the significance level for the hypothesis test.

t would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the mean is higher than 3, the system of hypothesis would be:

Null hypothesis: $\mu \leq 3$

Alternative hypothesis: $\mu > 3$

If we analyze the size for the sample is > 30 and we know the population deviation so is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic

We can replace in formula (1) the info given like this:

$z=\frac{3.1-3}{\frac{2.449}{\sqrt{47}}}=0.280$

P-value

Since is a one side test the p value would be:

$p_v =P(z>0.280)=0.390$

Conclusion

If we compare the p value and the significance level assumed $\alpha=0.01$ we see that $p_v>\alpha$ so we can conclude that we have enough evidence to fail reject the null hypothesis, so we can't conclude that the height of men actually its NOT significant higher than 0.3 at 1% of signficance.

3 0

3 years ago