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olchik [2.2K]
3 years ago
6

Can someone answer this correctly

Mathematics
2 answers:
Pie3 years ago
7 0

Answer:

3/C

Step-by-step explanation:

G x M = 117.50

liberstina [14]3 years ago
6 0

Answer:

Its the third one!

Step-by-step explanation:

:)

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A facilities manager at a university reads in a research report that the mean amount of time spent in the shower by an adult is
arlik [135]

Answer:

(a) <em>H₀</em>: <em>μ</em> = 5 vs. <em>Hₐ</em>: <em>μ</em> ≠ 5.

(b) The test statistic value is -3.67.

(c) The <em>p</em>-value of the test is 0.0025.

(d) The mean amount of time spent in the shower by an adult is different from 5 minutes.

Step-by-step explanation:

In this case we need to test whether the mean amount of time that college students spend in the shower is significantly different from 5 minutes.

The information provided is:

n=15\\\bar x=4.29\\s=0.75\\\alpha =0.01

(a)

The hypothesis for the test can be defined as follows:

<em>H₀</em>: The mean amount of time spent in the shower by an adult is 5 minutes, i.e. <em>μ</em> = 5.

<em>Hₐ</em>: The mean amount of time spent in the shower by an adult is different from 5 minutes, i.e. <em>μ</em> ≠ 5.

(b)

As the population standard deviation is not known we will use a <em>t</em>-test for single mean.

Compute the test statistic value as follows:

t=\frac{\bar x-\mu}{s/\sqrt{n}}\\\\=\frac{4.29-5}{0.75/\sqrt{15}}\\\\=-3.67

Thus, the test statistic value is -3.67.

(c)

Compute the <em>p</em>-value of the test as follows:

p-value=2\times P(t_{\alpha/2, (n-1)}

*Use a <em>t</em>-table.

Thus, the <em>p</em>-value of the test is 0.0025.

(d)

Decision rule:

If the <em>p</em>-value of the test is less than the significance level then the null hypothesis will be rejected and vice-versa.

<em>p</em>-value = 0.0025 < <em>α</em> = 0.01

The null hypothesis will be rejected at 1% level of significance.

Thus, concluding that the mean amount of time spent in the shower by an adult is different from 5 minutes.

7 0
3 years ago
Ples helpe me its math
morpeh [17]

Hey there!

Let's write this as a ratio/proportion.

The sum of this basic ratio is 4.25.

To figure out how much of each we have for 34, we divide this 34 by 4.25, our sum of the two ingredients. This will give us a factor we can multiply our two ingredient measurements by.

34/4.25=8

Now, we multiply our two ingredients by eight.

2.75(8)=22

1.5(8)=12

Note that these two add up to make 34 tablespoons.

Therefore, we have...

22 tablespoons of olive oil and 12 tablespoons of balsamic vinegar were used in the 34 tablespoons of bread dip.

I hope this helps! Have a great day! :)

3 0
3 years ago
Read 2 more answers
8a+6ab+5b,-6a-ab-8b and - 4a+2ab+3b<br><br>Pls answer this question ​
suter [353]

Answer:

4 a+8 ab+8b

Step-by-step explanation:

8 a-4 a+6ab+2ab+5 b+3 b

4 a+8 ab+8b

6 0
3 years ago
- 7h + 2(-4h +5) &gt; -4h +1 +10. Solve for h​
navik [9.2K]

Hello.

-7h + 2(-4h + 5) > -4h + 1 + 10 ; solve for h

Our first step is to get rid of all the parenthesis. We can do this by simplifying everything out.

-7h - 8h + 10 > -4h + 11

Add like terms.

-15h + 10 > -4h + 11

Now, we must isolate our variables. We do this by moving all variables to one side and moving our other numbers to the other.

Subtract 10 from both sides. Then, add 4h to both sides.

-15h + 4h > 11 - 10

Simplify.

-h > 1

Divide both sides by -1.

However, keep in mind that when dividing with a negative, you must change the sign. Therefore, > turns into <

-h ÷ -1 < 1 ÷ -1

h < -1

6 0
3 years ago
The first quartile of the data set represented by the box plot is (8, 9, 12,14) . The median of the data set is (8, 12,16,19)
Andrei [34K]
The first quartile is 12. The median is 16!
7 0
3 years ago
Read 2 more answers
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