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3 years ago

Brainliest if answer is correct

Mathematics

2 answers:

Yanka [14]3 years ago

7 0

Answer:

this is my best educated guess is probably C

Step-by-step explanation:

sorry if this is not correct

Brut [27]3 years ago

4 0

Answer:

Step-by-step explanation:

You need to find the individual shapes and add them together. The surface area of the 5 squares is 84.64 each. (84.64*5)=423.2. Then you need to find the 4 triangles on top. Each with a surface area of 46.65. (4*46.65)=186.6 you add your total surface areas (186.6+423.2)=609 estimated.

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A researcher wants to check the claim that convicted burglars spend less than 18.7 months in jail, on average. She takes a rando

vivado [14]

Answer:

a. No, there is not enough evidence to support the claim using a level of significance of 1%.

b. Null Hypothesis, $H_0$ : $\mu \geq$ 18.7 months

c. Alternate Hypothesis, $H_A$ : $\mu$ < 18.7 months

d. P-value of hypothesis test = 0.0199 or 1.99%

e. We conclude that the convicted burglars spend more than or equal to 18.7 months in jail, on average.

Step-by-step explanation:

We are given that a researcher wants to check the claim that convicted burglars spend less than 18.7 months in jail, on average.

She takes a random sample of 67 such cases from court files and finds that the mean is 16.8 months with a standard deviation of 7.3 months.

Let $\mu$ = true mean time convicted burglars spend in jail.

SO, Null Hypothesis, $H_0$ : $\mu \geq$ 18.7 months {means that the convicted burglars spend more than or equal to 18.7 months in jail, on average}

Alternate Hypothesis, $H_A$ : $\mu$ < 18.7 months {means that the convicted burglars spend less than 18.7 months in jail, on average}

The test statistics that will be used here is One-sample t test statistics as we don't know about the population standard deviation;

T.S. = $\frac{\bar X -\mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\bar X$ = sample mean time spent in jail = 16.8 months

s = sample standard deviation = 7.3 months

n = sample of cases = 67

So, test statistics = $\frac{16.8-18.7}{\frac{7.3}{\sqrt{67} } }$ ~ $t_6_6$

= -2.13

Hence, the value of test statistics is -2.13.

Now, P-value of the test statistics is given by;

P-value = P( $t_6_6$ < -2.13) = 0.0199 or 1.99%

If the P-value of test statistics is more than the level of significance, then we will not reject our null hypothesis as it will not fall in the rejection region.

If the P-value of test statistics is less than the level of significance, then we will reject our null hypothesis as it will fall in the rejection region.

Now, here the P-value is 0.0199 or 1.99% which is clearly higher than the level of significance of 1%, so we will not reject our null hypothesis as it will not fall in the rejection region.

Therefore, we conclude that the convicted burglars spend more than or equal to 18.7 months in jail, on average.

6 0

3 years ago

O win a contest, the number of beans in a jar has to be guessed within 20 of the actual number. If the number of beans in the ja

Katena32 [7]

Answer:B is the answer like fr fr

Explaination: Because it just is.

3 0

3 years ago

Read 2 more answers

Can someone /please/ help me on some math problems?

Leviafan [203]

WILL TRY WHATS YOUR PROBLEM

8 0

4 years ago

2 Points If F(x) = x - 2, which of the following is the inverse of F(x)?

solniwko [45]

Answer:

$f^{-1}$ (x) = x + 2

Step-by-step explanation:

Let y = f(x) and rearrange making x the subject

y = x - 2 ( add 2 to both sides )

y + 2 = x

Change y back into terms of x, thus

x = y + 2, so

$f^{-1}$ (x) = x + 2

5 0

3 years ago

Whats the answer for this. I am stuck

Lubov Fominskaja [6]

Answer:

the probability that either B occurs without A occurring or A and B both occur is 0.73.

Step-by-step explanation:

4 0

3 years ago