Can some one help me out my grades are bad

Ashley is preparing for a horse riding competition. She has trained her horse for 6 hours and has completed 240 rounds. At what

lyudmila [28]

Answer:

40

Step-by-step explanation:

4 0

3 years ago

] It is claimed that 42% of US college graduates had a mentor in college. For a sample of college graduates in Colorado, it was

Bad White [126]

Answer:

$z=\frac{0.480 -0.42}{\sqrt{\frac{0.42(1-0.42)}{1045}}}=3.930$

The p value for this case would be given by:

$p_v =P(z>3.930)=0.0000443$

For this case the p value is lower than the significance level so then we have enough evidence to reject the null hypothesis so then we can conclude that the true proportion is significantly higher than 0.42

Step-by-step explanation:

Information given

n=1045 represent the random sample selected

X=502 represent the college graduates with a mentor

$\hat p=\frac{502}{1045}=0.480$ estimated proportion of college graduates with a mentor

$p_o=0.42$ is the value that we want to test

z would represent the statistic

$p_v$ represent the p value

Hypothesis to test

We want to test if the true proportion is higher than 0.42, the system of hypothesis are.:

Null hypothesis: $p \leq 0.42$

Alternative hypothesis: $p > 0.42$

The statistic is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

Replacing the info we got:

$z=\frac{0.480 -0.42}{\sqrt{\frac{0.42(1-0.42)}{1045}}}=3.930$

The p value for this case would be given by:

$p_v =P(z>3.930)=0.0000443$

For this case the p value is lower than the significance level so then we have enough evidence to reject the null hypothesis so then we can conclude that the true proportion is significantly higher than 0.42

7 0

3 years ago

Can you please solve 1 and 2 for me please? This doesn't even feel like math, just a stupid riddle.

kherson [118]

Answer:

1. Why does the graph not start at zero?

It doesn't start at zero because all ovens start at 350°(probably less, but normally 350°) and not zero degrees.

2. What does it mean when the graph flattens out?

When the graph flattens out, it means that the temperature doesn't increase nor decrease, but instead it remains the same.

6 0

3 years ago

Dimple volunteered 32 hours last month at a local animal shelter. This is 20% of the total hours that she has volunteered this y

vazorg [7]

If she was to volunteer 32 hours and it is worth 20%, then that means 32 hours is 1/5 of her yearly hours. If you were to multiply her volunteer hours by five, then you are getting the year number of hours she has volunteered.

32 x 5 = 160

So, she volunteers 160 hours this year.

8 0

2 years ago

Please help me with this thank you

Nikolay [14]

Answer:11

Step-by-step explanation

3 0

3 years ago

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