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3 years ago

In a certain dass 7/10 of the students got problem 15 wrong on Friday's math test.

Mathematics

1 answer:

Y_Kistochka [10]3 years ago

8 0

Answer:

Then about 3/10 didn't get problem 15 wrong on Friday's math test. :)

Step-by-step explanation:

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What is the cost of mailing a package that weighs 2 pounds 3 ounces if the cost is $1.50 plus 0.05 for each ounce over six ounce

scoray [572]

Answer:

The answer is B

Step-by-step explanation:

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35 ounce - 6 ounce = 29 ounce

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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 $44402.0104 < \mu_1 - \mu_2 < 55597.9896$

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3 years ago

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alex41 [277]

Answer:

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Step-by-step explanation:

first do the powers 2 to the 3rd power 8 3.5 to the second power 12.25 8 x 10 80 - 8 = 72 + 12.25 = 84.25

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Answer:

the commutative property because you’re not changing the way its form style, but of more like their former

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3 years ago

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Answer:

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Step-by-step explanation:

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