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Usimov [2.4K]
2 years ago
14

Help please I will give brainliest

Mathematics
1 answer:
bekas [8.4K]2 years ago
4 0

Answer:

No, they could mix

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A data set lists earthquake depths. The summary statistics are nequals300​, x overbarequals5.89 ​km, sequals4.44 km. Use a 0.01
kirza4 [7]

Answer:

Null hypothesis H_0:\mu=5.00km

Alternative hypothesis H_1:\mu\neq 5.00km

The p value is 0.000517, which is less than the significance level 0.01, therefore we reject the null hypothesis and conclude that population mean is not equal to 5.00.

Step-by-step explanation:

It is given that a data set lists earthquake depths. The summary statistics are

n=300

\overline{x}=5.89km

s=4.44km

Level of significance = 0.01

We need to test the claim of a seismologist that these earthquakes are from a population with a mean equal to 5.00.

Null hypothesis H_0:\mu=5.00km

Alternative hypothesis H_1:\mu\neq 5.00km

The formula for z-value is

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

z=\frac{5.89-5.00}{\frac{4.44}{\sqrt{300}}}

z=\frac{0.89}{0.25634351952}

z=3.4719

The p-value for z=3.4719 is 0.000517.

Since the p value is 0.000517, which is less than the significance level 0.01, therefore we reject the null hypothesis and conclude that population mean is not equal to 5.00.

6 0
2 years ago
A 20-row theater has three sections of seating. In each section,
ivanzaharov [21]
I'm not 100% sure but try A.
6 0
3 years ago
Read 2 more answers
What’s the length of the hypotenuse
STALIN [3.7K]

Answer:

8.94

Step-by-step explanation:

A^{2}+B^{2}= C^{2}\\A= 4,    B=8   \\4^{2} +8^{2} =80\\\sqrt{80} =8.94

4 0
3 years ago
In circle v, r=14ft. what is the area of circle v? <br>A)14πft2<br>B)28πft2<br>C)49πft2<br>D)196πft2
amm1812
I'm pretty sure that the answer is D
6 0
3 years ago
Read 2 more answers
Joel has a goal to practice his clarinet for 4 hours per week. The list 5 1below shows the number of hours Joel has practiced so
Reil [10]

Answer:

Joel need to practice this week = \frac{3}{4} hour

Step-by-step explanation:

P.S - the exact question is -

As given

Total practice goal of Joel = 4\frac{1}{2} hours

He practiced on : Monday - 1\frac{1}{2} hours

                             Wednesday - 1\frac{1}{4} hours

                             Thursday - 1 hour

Let the remaining practice = x hours

⇒ Total practice =  4\frac{1}{2} hours

⇒1\frac{1}{2} + 1\frac{1}{4} + 1 + x = 4\frac{1}{2}

⇒ 1 + \frac{1}{2} + 1 + \frac{1}{4} + 1 + x = 4 + \frac{1}{2}

⇒3 + x - 4 = \frac{1}{2} -  \frac{1}{2} - \frac{1}{4}

⇒x - 1 = -\frac{1}{4}

⇒x = -\frac{1}{4} + 1 = \frac{-1 + 4}{4} = \frac{3}{4}

⇒x = \frac{3}{4} hour

∴ we get

Joel need to practice this week = \frac{3}{4} hour

8 0
2 years ago
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