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2 years ago

TwT can someone pls help me with this. ;w;

Mathematics

1 answer:

Aleks [24]2 years ago

7 0

Answer:

Volume of a cone is V = (1/3) of (pi)(radius^2)(height)

So (3.14)(36)(9) = 1017.36

Then divide by three.

1017.36 / 3 = 339.12

V = 339.12

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A random sample of 64 second-graders in a certain school district are given a standardized mathematics skills test. The sample m

svet-max [94.6K]

Answer:

Given : The sample mean score is 51.48 .

The standard deviation for the population of test scores is 15.

The nationwide average score on this test is 50.

To Find : Perform the hypothesis test and compute the P-value?

Solution:

Sample size = n = 64

Since n > 30

So, we will use z test over here

We are supposed to find The school superintendent wants to know whether the second-graders in her school district have greater math skills than the nationwide average.

Hypothesis : $H_0:\mu \leq 50\\H_a:\mu>50$

Formula of z test : $z =\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}$

$x = 51.48\\\mu = 50\\\sigma = 15\\ n = 64$

Substitute the values

$z =\frac{51.48-50}{\frac{15}{\sqrt{64}}}$

$z =0.789$

Find the value of P(z) from z table

p(z)=0.7823

Since we are given that we are supposed to find The school superintendent wants to know whether the second-graders in her school district have greater math skills than the nationwide average.

So, p value = 1-P(z) = 1-0.7823=0.2177

In general , Level of significance is 0.05

So, p value is greater than alpha.

So, we accept the null hypothesis.

5 0

3 years ago

Read 2 more answers

there are 7 boys and girls in a club. How many different ways to form a queue starting with a girl after each girl?

Soloha48 [4]

Answer:

7 girls can go in the first place, 6 in the second, etc.

7! ways is the number of ways to arrange the girls.

likewise the boys can be arranged in 7! ways

The total number of ways becomes 7! * 7!

7! * 7! = 25,401 600 ways

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2 years ago

What is 0.004 divided by 0.05

Korvikt [17]

When u divide 0.004 by 0.05 you will get 0.08 as the quotient.

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3 years ago

Write the explicit formula for the geometric sequence. a1 = -5 a2 = 20 a3 = -80

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3 years ago

Graphing Worksheet

kompoz [17]

The answer is b cuz it changes how it go

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