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eduard
2 years ago
15

What is the estimate of 645,547? pls help

Mathematics
1 answer:
Keith_Richards [23]2 years ago
5 0

The estimate of 645,547 to the nearest hundred thousand is 600,000

<h3>How to estimate the number?</h3>

The number is given as:

Number = 645,547

To estimate the number means that we approximate the number.

In this case, we round the number to the nearest 100,000.

This means that:

645,547 approximates to 600000

Hence, the estimate of 645,547 to the nearest hundred thousand is 600,000

Read more about estimation at:

brainly.com/question/372299

#SPJ1

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The mean consumption of bottled water by a person in the United States is 28.5 gallons per year. You believe that a person consu
Over [174]

Answer:

t=\frac{27.8-28.5}{\frac{4.1}{\sqrt{100}}}=-1.707    

p_v =P(t_{99}

If we compare the p value with a significance level for example \alpha=0.1 we see that p_v so we can conclude that we reject the null hypothesis, so there is not enough evidence to conclude that the mean for the consumption is less than 28.5 gallons at 0.1 of significance, so we can reject the claim that person consume more than 28.5 gallons.

Step-by-step explanation:

Data given and notation    

\bar X=27.8 represent the mean for the account balances of a credit company

s=4.1 represent the population standard deviation for the sample    

n=1000 sample size    

\mu_o =28.5 represent the value that we want to test  

\alpha=0.1 represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)    

p_v represent the p value for the test (variable of interest)

State the null and alternative hypotheses.    

We need to conduct a hypothesis in order to determine if the mean for the person consume is more than 28.5 gallons, the system of hypothesis would be:    

Null hypothesis:\mu \geq 28.5    

Alternative hypothesis:\mu < 28.5    

We don't know the population deviation, so for this case we can use the t test to compare the actual mean to the reference value, and the statistic is given by:    

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}} (1)    

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic    

We can replace in formula (1) the info given like this:    

t=\frac{27.8-28.5}{\frac{4.1}{\sqrt{100}}}=-1.707    

Calculate the P-value    

First we need to calculate the degrees of freedom given by:

df=n-1=100-1=99

Since is a one-side lower test the p value would be:    

p_v =P(t_{99}

In Excel we can use the following formula to find the p value "=T.DIST(-1.707,99)"  

Conclusion    

If we compare the p value with a significance level for example \alpha=0.1 we see that p_v so we can conclude that we reject the null hypothesis, so there is not enough evidence to conclude that the mean for the consumption is less than 28.5 gallons at 0.1 of significance, so we can reject the claim that person consume more than 28.5 gallons.

5 0
3 years ago
Please help! files attached.
kotykmax [81]
The first question would be x + (x + 4). This is because Max has $x and Keisha has (x + 4) because she has four MORE THAN Max. I am pretty sure that the second one is A, but I am not positive. The first one is right though. I hope this helps!!!
5 0
3 years ago
Which describes the location of 2 /3 on the number line? A) between 1/3 and 2 5 B) between 2 /5 and 1 /2 C) between 1 /2 and 3 /
Bas_tet [7]

Answer:

2/3 lies between 1 and 2

Option C

5 0
3 years ago
Read 2 more answers
Can somebody pls help me!!!
ankoles [38]

Answer:

200 cm^2

Step-by-step explanation:

Add up all areas

4 x 6 x 1/2 = 12

4 x 6 x 1/2 = 12

3 x 11 = 33

3 x 11 = 33

6 x 11 = 66

12 + 12 + 33 + 33 + 66 = 200

3 0
3 years ago
Solve 2x = 3.<br> Round to the nearest ten-thousandth.
levacccp [35]

divide by 2 on both sides.

3/2

x=1.5

7 0
2 years ago
Read 2 more answers
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