All categories

3 years ago

HURRY!! WILL MARK BRAINLIEST!! ALSO WILL CASHAPP 10 DOLLARS IM DESPERATE!!HURRY!!

Mathematics

2 answers:

grin007 [14]3 years ago

7 0

Answer:

Step-by-step explanation:

The first and third ones doesn't make sense because a positive number can't be smaller than a negative number. The fourth is false as well because when we convert the fractions so that they have a common denominator, we get 1 3/12 > 1 4/12, which is incorrect. Therefore, it's the second one. Hope this helps!

KiRa [710]3 years ago

5 0

Answer:

The second one

Step-by-step explanation:

You might be interested in

Hurry hurry<br> Please answer this quickly<br> First person to answer will be brainliest

NeTakaya

Answer:

Step-by-step explanation:

8 0

3 years ago

A manager is comparing wait times for customers in a coffee shop based on which employee is

anyanavicka [17]

Using the t-distribution, as we have the standard deviation for the sample, it is found that there is a significant difference between the wait times for the two populations.

<h3>What are the hypothesis tested?</h3>

At the null hypothesis, we test if there is no difference, that is:

$H_0: \mu_A - \mu_B = 0$

At the alternative hypothesis, it is tested if there is difference, that is:

$H_1: \mu_A - \mu_B = 0$

<h3>What are the mean and the standard error of the distribution of differences?</h3>

For each sample, we have that:

$\mu_A = 73, s_A = \frac{2}{\sqrt{100}} = 0.2$

$\mu_B = 74, s_B = \frac{4}{\sqrt{100}} = 0.4$

For the distribution of differences, we have that:

$\overline{x} = \mu_A - \mu_B = 73 - 74 = -1$

$s = \sqrt{s_A^2 + s_B^2} = \sqrt{0.2^2 + 0.4^2} = 0.447$

<h3>What is the test statistic?</h3>

It is given by:

$t = \frac{\overline{x} - \mu}{s}$

In which $\mu = 0$ is the value tested at the null hypothesis.

Hence:

$t = \frac{\overline{x} - \mu}{s}$

$t = \frac{-1 - 0}{0.447}$

$t = -2.24$

<h3>What is the p-value and the decision?</h3>

Considering a one-tailed test, as stated in the exercise, with 100 - 1 = 99 df, using a t-distribution calculator, the p-value is of 0.014.

Since the p-value is less than the significance level of 0.05, it is found that there is a significant difference between the wait times for the two populations.

More can be learned about the t-distribution at brainly.com/question/16313918

8 0

2 years ago

Cual es la fraccion Unitaria mas Grande?

ozzi

No se hahahahaahhaat

6 0

3 years ago

A restaurant bought 5 pounds of salmon for $42.50. How much would 7 pounds of salmon cost? *

Elanso [62]

Answer:

59.5

Step-by-step explanation:

42.50/5=8.5

1 lb=8.5

7lb=7*8.5=59.5

7 0

3 years ago

Is a measure of 25 inches "far away" from a mean of 16 inches? As someone with knowledge of statistics, you answer "it depen

erik [133]

Answer:

a) 25 is 3 standard deviation from the mean

b) Is far away from the mean, only 0,3 % away from the right tail

c) 25 is pretty close to the mean (just a little farther from 1 standard deviation)

Step-by-step explanation:

We have a Normal Distribution with mean 16 in.

Case a) we also have a standard deviation of 3 inches

3* 3 = 9

16 (the mean) plus 3*σ equal 25 in. the evaluated value, then the value is 3 standard deviation from the mean

Case b) 25 is in the range of 99,7 % of all value, we can say that value is far away from the mean, considering that is only 0,3 % away from the right tail

Case c) If the standard deviation is 7 then

mean + 1*σ = 16 + 7 =23

25> 23

25 is pretty close to the mean only something more than 1 standard deviation

4 0

3 years ago

HURRY!! WILL MARK BRAINLIEST!! ALSO WILL CASHAPP 10 DOLLARS IM DESPERATE!!HURRY!!​

HURRY!! WILL MARK BRAINLIEST!! ALSO WILL CASHAPP 10 DOLLARS IM DESPERATE!!HURRY!!