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2 years ago

HOW MANY NINTHS DOES IT TAKE TO MAKE THE SAM AMOUNT AS 1/3

Mathematics

1 answer:

Ira Lisetskai [31]2 years ago

8 0

1/3 is equal to 3/9. The answer is 3.

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An article presents a study of the failure pressures of roof panels. A sample of 15 panels constructed with 8-inch nail spacing

wariber [46]

Answer:

There is sufficient evidence to conclude that six inches spacing has a higher mean failure pressure than 8 inches

Reject $H_0\ at\ 5%$ level of significance

Step-by-step explanation:

From the question we are told that:

Sample size 1 $n_1=15$

Spacing 1 $s_1=8$

Mean 1 $\=x_1=8.48$

Standard deviation 1 $\sigma_1=0.96 kPa$

Sample size 2 $n_2=16$

Spacing 2 $s_2=6$

Mean 1 $\=x_1=9.93$

Standard deviation 1 $\sigma_1=1.02 kPa$

Generally the hypothesis is mathematically given as

Null $H_0:\mu_1-\mu_2$

Alternative $H_a:\mu_1\mu_2$

Generally the equation for pooled estimate is mathematically given by

$S=\sqrt{\frac{(n_1-1)\sigma_1^2+(n_2-1)\sigma_2^2}{n_1+n_2-2} }$

Therefore

$S=\sqrt{\frac{(15-1)0.96^2+(16-1)1.02^2}{15+15-2} }$

$S=0.9905$

Generally the equation for test statistics is mathematically given by

$t=\frac{\=x_1+\=x_2}{S\sqrt{\frac{1}{n _1}+\frac{1}{n_2}}}$

$t=\frac{\=8.48-9.93}{0.9905\sqrt{\frac{1}{15}+\frac{1}{15}}}$

$t=-4.00091$

Therefore From table

$P value=P(t_{15+15-2}=4.00091)$

$P value=0.00041918$

$P$

Therefore

There is sufficient evidence to conclude that six inches spacing has a higher mean failure pressure than 8 inches

Reject $H_0\ at\ 5%$ level of significance

3 0

2 years ago

Subtract what is the difference(9*10^10) -(4*10^10) in scientific notation

Studentka2010 [4]

Answer:

5*10^10.

Step-by-step explanation:

9 - 4 = 5.

The last part of the 2 numbers is 10^10,

so the answer is 5* 10^10.

6 0

3 years ago

Estime 652 divied by 8

stich3 [128]

81.5 should be your answer. round to the nearest 10th and you get 82. hope this helps lol

8 0

3 years ago

Read 2 more answers

Where is the best place to buy a car? (Like a low price but good car)

anastassius [24]

Answer:

motor world

Step-by-step explanation:

it's a world full of cars

7 0

2 years ago

PLEASE HELP thanks -lyssa

Lostsunrise [7]

This answer is 12
what you have to do is technically multiply to get your answer :))

4 0

3 years ago