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3 years ago

Respuesta de 8(10 - (3 + 2))

1 answer:

4 0

Wassup wit it g, I’m on here tryna cheat too but might as well help a homie out while I’m at it, your answer finna be 40

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An accountant claims to be able to complete a standard tax return in under an hour. For a random sample of 24 tax returns, the a

anzhelika [568]

Answer:

The test statistic for the hypothesis test to check accountant's claim is 2.036.

Step-by-step explanation:

We are given that an accountant claims to be able to complete a standard tax return in under an hour. For a random sample of 24 tax returns, the accountant averaged 63.2 minutes.

Assume that the population standard deviation is equal to 7.7 minutes and the population is normally distributed.

Let $\mu$ = average time to complete a standard tax return.

So, Null Hypothesis, $H_0$ : $\mu$ = 60 minutes {means that an accountant can complete a standard tax return in an hour}

Alternate Hypothesis, $H_A$ : $\mu$ < 60 minutes {means that an accountant can complete a standard tax return in under an hour}

The test statistics that will be used here is One-sample z test statistics as we know about population standard deviation;

T.S. = $\frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }$ ~ N(0,1)

where, $\bar X$ = sample average time = 63.2 minutes

$\sigma$ = population standard deviation = 7.7 minutes

n = sample of tax returns = 24

So, test statistics = $\frac{63.2-60}{\frac{7.7}{\sqrt{24} } }$

= 2.036

Hence, The value of test statistics for the hypothesis test to check accountant's claim is 2.036.

3 0

4 years ago

3. A bag contains 4 white, 3 blue, and 6 red marbles. A marble is drawn from the bag, replaced,

gladu [14]

Answer:

Hope this helps! If I could have brainliest I'm trying to rank up.

Step-by-step explanation:

First find the probability of each color being drawn.

We need to find the total number of marbles first.

4 + 3 + 6 = 13

Everything will be over 13.

Probability of a white marble being drawn --> 4/13

Probability of a blue marble being drawn --> 3/13

Probability of a red marble being drawn --> 6/13

Now to find the probabilities of more than one being drawn, we can multiply.

Part A:

6/13*6/13=36/169

Part B:

3/13*3/13=9/169

Part C:

6/13*6/13=18/169

Part D:

7/13*7/13=49/169

8 0

3 years ago

Solve 36+57 on a number line

disa [49]

+57

------

On a number line: Start at 0. Count forward until you reach 36. Once you've reached 36, Mark it. Then you go forward 57, from the mark you made at 36. You should end up on 93 on the number line.

8 0

4 years ago

Which answer uses the distributive property to write an expression equivalent to 5(32). 5(32) 5+30+2 5(30+2) 5*30*2

melisa1 [442]

Answer:

5(30 + 2)

Step-by-step explanation:

5(32)=160

5(30+2)=160

The rest equal different numbers

5 0

3 years ago

Read 2 more answers

In 1990, the profit of the Gamma company was $11.900,848. Each year after 1990profits fell by \$48,263 on average Construct a li

Marina86 [1]

Answer:

$10452958

Step-by-step explanation:

Initial profit = $11900848

Fall rate= $48263 per year

Equation:

P(x)= 11900848 - (x-1990)*48263,

where P(x)= profit at year of x, and 1990<x<2020

P(2020)= 11900848- 30*48263= $10452958

4 0

4 years ago