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2 years ago

7. Sid has a board that is 8 5/6

Mathematics

2 answers:

natulia [17]2 years ago

6 0

Answer:

5 7/12 feet left

Step-by-step explanation:

Step 1: 8 5/6 - 3 1/4

Step 2: = 67/12 (Put into proper fraction)

Step 3: = 5 7/12

Hope that helps :)

Kisachek [45]2 years ago

4 0

Answer:

5 7/12

Step-by-step explanation:

Given that the board is 8 5/6 feet long.

Cuts off 3 1/4 feet.

8 5/6- 3 1/4

Change fractions into improper fractions.

8 5/6=53/6

3 1/4=13/4

-------------------------------------------------------------

53/6x2/2=106/12

13/4x3/3=39/12

106/12-39/12=67/12

=5 7/12

Hope this helps :)

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A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are centimeters on a pain sca

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The confidence interval for mean of the "before-after" differences is $\fbox{(-0.4037,1.8037)}$

Further explanation:

Find the difference between the before pain and the after pain.

Difference = before-after

Kindly refer to the Table for the difference of between the before and after pain.

Sum of difference = $5.6$

Total number of observation = $8$

Mean of difference = $0.7$

Sample standard deviation $s$ = $1.3201$

Level of significance = $5\%$

Formula for confidence interval = $\left( \bar{X} \pm t_{n-1, \frac{\alpha}{2}\%} \frac{s}{\sqrt{n}} \right)$

confidence interval = $\left( 0.7 \pm t_{8-1, \frac{5}{2}\%} \frac{1.3201}{\sqrt{8}} \right)$

confidence interval = $\left( 0.7 \pm t_{7, \frac{5}{2}\%} \frac{1.3201}{\sqrt{8}} \right)$

From the t-table.

The value of $t_{7, \frac{5}{2}\%$ = $2.365$

Confidence interval = $( 0.7 \pm 2.365}\times \frac{1.3201}{\sqrt{8}}) \right)$

Confidence interval = $\left( 0.7 - 2.365}\times \0.4667,0.7 + 2.365}\times \0.4667) \right$

Confidence interval = $(0.7-1.1037,0.7+1.1037)$

Confidence interval = $\fbox{(-0.4037,1.8037)}$

The $95\%$ confidence interval tells us about that $95\%$ chances of the true mean or population mean lies in the interval.

Yes, the hypnotism appear to be effective in reducing pain as confidence interval include includes the positive deviation from the mean.

Learn More:

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Answer Details:

Grade: College Statistics

Subject: Mathematics

Chapter: Confidence Interval

Keywords:

Probability, Statistics, Speed dating, Females rating, Confidence interval, t-test, Level of significance , Normal distribution, Central Limit Theorem, t-table, Population mean, Sample mean, Standard deviation, Symmetric, Variance.

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3 years ago

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Savannah had 400 chocolate chips. She saved x chips for a garnish, and mixed the rest of the chocolate chips evenly into 3 pans

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Answer:

( 400-x)/3

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Total chocolate chips Savannah had = 400

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Number of chocolate chips remain = 400-x

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Chocolate chips were spread evenly in 3 pans,

Chocolate chips were in each pan of brownies =( 400-x)/3

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3 years ago

A local store sells boxes of pens. The cost of a box of pens and the number of pens in the box are related. You need 39 pens. Id

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Tay-Sachs disease is a genetic disorder that is usually fatal in young children. If both parents are carriers of the disease, th

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Answer:

Step-by-step explanation:

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3 years ago

Solve the system using elimination 6x-3y=15 and 7x+4y=10

Oxana [17]

6x - 3y = 15.....multiply by 4
7x + 4y = 10....multiply by 3
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24x - 12y = 60 (result of multiplying by 4)
21x + 12y = 30 (result of multiplying by 3)
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45x = 90
x = 90/45
x = 2

6x - 3y = 15
6(2) - 3y = 15
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3 years ago