Evaluate -6^ 2 - 28 ÷ 4 + (-9). 52 -52 20 -20

Pleaseeee help meeeeeee

Maslowich

That my dear your answer would be 16 degrees hope this helped

5 0

3 years ago

Please answer this correctly which is the correct options

Brums [2.3K]

The first, second, third, and fourth options, are all equal to 32, including the top option. So all of the are correct.

8 0

3 years ago

Determine the derivative of f(x) = -5x+3x from first principles first Calculate

ASHA 777 [7]

Answer:

The derivative of the function f(x) = -5x+3x is ----> -2

Step-by-step explanation:

8 0

3 years ago

What is 47+50- __ - 32

Klio2033 [76]

This question doesn't make sense.Are you sure you wrote it correctly?

8 0

3 years ago

A candy manufacturer claims that the average weight of their individually wrapped candy is 3 grams. Sixty-four candy pieces were

Anon25 [30]

Answer:

$t=\frac{2.8-3}{\frac{0.5}{\sqrt{64}}}=-3.2$

$p_v =P(t_{(63)}$

Conclusion

If we compare the p value and the significance level given $\alpha=0.05$ we see that $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the true mean is significantly lower than 3 grams at 5% of signficance.

Step-by-step explanation:

Data given and notation

$\bar X=2.8$ represent the sample mean

$s=0.5$ represent the sample standard deviation for the sample

$n=64$ sample size

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

$\alpha=0.05$ 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 true mean is lower than 3 grams, the system of hypothesis would be:

Null hypothesis: $\mu \geq 3$

Alternative hypothesis: $\mu < 3$

If we analyze the size for the sample is > 30 but we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

t-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:

$t=\frac{2.8-3}{\frac{0.5}{\sqrt{64}}}=-3.2$

P-value

The first step is calculate the degrees of freedom, on this case:

$df=n-1=64-1=63$

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

$p_v =P(t_{(63)}$

Conclusion

If we compare the p value and the significance level given $\alpha=0.05$ we see that $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the true mean is significantly lower than 3 grams at 5% of signficance.

8 0

3 years ago