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3 years ago

Helppp!!!! please!!!

Mathematics

1 answer:

almond37 [142]3 years ago

7 0

Answer:

...........................

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18 is what__ % of 30.

Nostrana [21]

18/30=?/100

18 times 100 = 1800

1800 divided by 30

60%

3 0

3 years ago

Use the normal distribution and the given sample results to complete the test of the given hypotheses. Assume the results come f

AlladinOne [14]

Answer:

$z=\frac{0.64 -0.5}{\sqrt{\frac{0.5(1-0.5)}{75}}}=2.43$

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

$p_v =P(z>2.43)=0.0075 \approx 0.008$

Since the p value is lower than the significance level we have enough evidence to reject the null hypothesis and we can conclude that the true proportion for this case is higher than 0.5

Step-by-step explanation:

Data given and notation

n=75 represent the random sample taken

$\hat p=0.64$ estimated proportion of interest

$p_o=0.5$ is the value that we want to test

$\alpha=0.05$ represent the significance level

Confidence=95% or 0.95

z would represent the statistic

$p_v$ represent the p value

System of hypothesis

We want to verify if the true proportion is higher than 0.5:

Null hypothesis: $p =0.5$

Alternative hypothesis: $p > 0.5$

The statistic is given by:

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

Replacing the info given we got:

$z=\frac{0.64 -0.5}{\sqrt{\frac{0.5(1-0.5)}{75}}}=2.43$

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

$p_v =P(z>2.43)=0.0075 \approx 0.008$

Since the p value is lower than the significance level we have enough evidence to reject the null hypothesis and we can conclude that the true proportion for this case is higher than 0.5

7 0

3 years ago

What is the x and y intercept of the parabola y=x^2-6x+10 and ow do you graph the equation

Mazyrski [523]

The x- intercept is where y = 0 on the graph and the y- intercept is where x= 0 on the graph. When X=0, all the terms, except for the constant are equal to zero, thus the y- intercept is the constant. y=10 when x=0. Use the quadratic formula to find the x value where y=0.
x= (-b +or- sqrt(b^2 -4ac))/2a

y=ax^2 +bx +c

The answer for the x- int is imaginary. This happens because 10 is the parabola's minimum value and it never touches the x- axis. y-int is 10

7 0

3 years ago

Imaginary numbers (-3-5/)(-3+5) Answer choices: 1. 34 2. 34-30i 3. -16

lisabon 2012 [21]

Answer:

the answer to the question is -16

7 0

3 years ago

HELP HELP HELP PLS OLS

kicyunya [14]

Answer:

10500

Step-by-step explanation:

The sales in dollars go up in 1500 init so basically you read the question n it says what dollars generated 3.5k in profits you find where the line is and where it stops at 3500 and its in the middle of 9k n 12k which is 10.5k

6 0

3 years ago