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2 years ago

Help me out please ASAP I have trouble rounding 5th grade

Mathematics

2 answers:

AlekseyPX2 years ago

5 0

Hi the answer is: a and b since it’s asking for you to click on two answers hope this helps :)

Ne4ueva [31]2 years ago

4 0

Answer: A and B

Step-by-step explanation:

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A drug company is considering marketing a new local anesthetic. The effective time of the anesthetic the drug company is current

lapo4ka [179]

Using the z-distribution, we have that:

The hypothesis test is:

$H_0: \mu = 7.4$

$H_1: \mu < 7.4$

The p-value is of 0.0668.

The critical value is $z^{\ast} = -1.28$

b) Since the test statistic is less than the critical value for the left-tailed test, there is enough evidence to conclude that the null hypothesis will be rejected.

Item a:

At the null hypothesis, it is tested if the mean is of 7.4 minutes, that is:

$H_0: \mu = 7.4$

At the alternative hypothesis, it is tested if the mean is lower than 7.4 minutes, that is:

$H_1: \mu < 7.4$

We have the standard deviation for the population, hence, the z-distribution is used.

The test statistic is given by:

$z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}$

The parameters are:

$\overline{x}$ is the sample mean.

$\mu$ is the value tested at the null hypothesis.

$\sigma$ is the standard deviation of the sample.

n is the sample size.

For this problem, the values of the parameters are: $\overline{x} = 7.1, \mu = 7.4, \sigma = 1.2, n = 36$ .

Hence, the value of the test statistic is:

$z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}$

$z = \frac{7.1 - 7.4}{\frac{1.2}{\sqrt{36}}}$

$z = -1.5$

Using a z-distribution calculator, the p-value is of 0.0668.

Also using a calculator, considering a left-tailed test, as we are testing if the mean is less than a value, the critical value with a significance level of 0.1 is of $z^{\ast} = -1.28$ .

Item b:

Since the test statistic is less than the critical value for the left-tailed test, there is enough evidence to conclude that the null hypothesis will be rejected.

You can learn more about the use of the z-distribution to test an hypothesis at brainly.com/question/16313918

5 0

2 years ago

Help plz will mark brainliest :)

avanturin [10]

Answer:

Step-by-step explanation:

subtract b from both sides

divide by x

5 0

2 years ago

Chandra runs 10 miles. After every two miles, she checks the time. The scatter plot shows her results.

masya89 [10]

Answer: 7.5

Step-by-step explanation:

Per 2 mile she ran 15m

Per one it’s 7.5m

3 0

3 years ago

A salesperson's commission rate is 6%. What is the commission from the sale of 42,000 worth of furnaces? Use pencil and paper

pickupchik [31]

Answer:

42,000 X 6 % = $2520.00

42,000 x 2 = 84,000

84,000 x 6% = $5,040

Step-by-step explanation:

3 0

2 years ago

Can someone help me?

mart [117]

-2 + 8 = 6

because if you have 2 negative circles ●● and 8 positive circles ○○○○○○○○ then once you take away the first two circles you get you answer. You do the opposite. :) ( hope that make sense... )

3 0

3 years ago