If 2 is a factor of a number, is that number a prime number? <br><br> __________

Guests at Brenda's birthday party were offered six choices of ice cream flavors: vanilla, chocolate chip, peppermint, chocolate,

Alexus [3.1K]

The answer is 4/6 which can be reduced to 2/3.

8 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

I need help with number 15

Kay [80]

400,7,000 i think im not quit sure i dont know

7 0

3 years ago

Read 2 more answers

6. Gabriella invests $6,500 into a savings account that earns 4.5% interest, and she is investing the money for 5 years without

sdas [7]

Answer:

1,462.50

Step-by-step explanation:

6500

x.045

=292.50 per year

x. 5 years

=1,462.50

4 0

3 years ago

On Monday, It took Helen three hours to do a page of science homework exercises. The next day she did the same number of exercis

disa [49]

.5 pages per hour? I'm not positive but I think that's right since she did one page of homework per day, 2 hours for one page would simplify to a half of a page per hour

6 0

3 years ago

If 2 is a factor of a number, is that number a prime number? ___________ explain