3 years ago

Helppp me plzzzzzzzzzzzz

Mathematics

2 answers:

Vlad [161]3 years ago

6 0

Can you tell me what the question is? Then I can answer it I can’t really see.

Nadya [2.5K]3 years ago

3 0

Multiply it then you’ll get your answer

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A real-estate company appraised the market value of 36 homes in Lyttelton and found that the sample mean and standard deviation

pantera1 [17]

Solution :

Sample size Sample mean Sample S.D.

Sample 1 $n_1=36$ $\bar{x}_1=150,000$ $s_1=17,000$

Sample 2 $n_2=45$ $\bar{x}_2=100,000$ $s_2=12,000$

$df = \frac{\left(\frac{s_1^2}{n_1}+\frac{s_2^2}{n_2}\right)^2}{\frac{1}{n_1-1}\left(\frac{s_1^2}{n_1}\right)^2+\frac{1}{n_2-1}\left(\frac{s_2^2}{n_2}\right)^2}$

= 60

Therefore, significance level, α = 0.1

Critical value, t* = 1.6706

So, the margin of error, $t^*=\sqrt{\frac{s_1^2}{n_1}+\frac{s_2^2}{n_2}}$

= 559.9896

Lower limit, $(\bar x_1-\bar x_2)-\text{(margin of error)}=44402.0104$

Upper limit, $(\bar x_1-\bar x_2)+\text{(margin of error)}=55597.9896$

Therefore 90% C.I. is (44402.0104, 55597.9896) or $44402.0104 < \mu_1 - \mu_2 < 55597.9896$

5 0

3 years ago

I do not have a clue on the answer it is 37 divided by 8921

Radda [10]

I got you man, the answer to that is 0.00414751709...

4 0

3 years ago

Read 2 more answers

Raquel and Van live in two different cities. As part of a project, they each record the lowest prices for a gallon of gas at gas

Sphinxa [80]

The standard deviation shows the dispersion (how close) of the data. Therefore the correct statement is A:
A- Raquel’s data are most likely closer to $3.42 than Van’s data are to $3.78.

5 0

3 years ago

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What is the circumference of a circle with a radius of 20 units

Kaylis [27]

Answer:

125.66

Step-by-step explanation:

C = 2πr = 2·π·20 = 125.66371

5 0

3 years ago

Find the diameter of the circle with the given circumference. Use 3.14 for pi. C=29 cm The diameter is about ____ cm. (Round to

dezoksy [38]

Answer:

= 9.2 cm

Step-by-step explanation:

D = C ÷ π

= 29cm ÷ 3.14

= 9.2356

= 9.2 cm

4 0

3 years ago