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3 years ago

X+7<13. ^^^^^ answer please & show work .

Mathematics

2 answers:

mario62 [17]3 years ago

6 0

Step-by-step explanation:

torisob [31]3 years ago

5 0

Answer:

x+7<13

x < 13-7

x < 6

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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

blondinia [14]

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

Read 2 more answers

In the summer, the Thomas family enjoys picking berries together. It takes them 20 minutes to pick 3 baskets of berries.

erastova [34]

Answer:

the numbers 20, 60, 80, and 120 go on the x axis

the numbers, 3, 9, 12, and 18 go on the y axis

so you go to 20 on the bottom and go up to number 3

60 go up to number 9

80 go up to number 12

120 go up to number 18

Step-by-step explanation:

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3 years ago

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BabaBlast [244]

Answer: 14.88 is the answer

Step-by-step explanation:

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2 years ago

Y divide 2 x 4 - 10 divide x + 6 where x = 5 and y = 16

Eva8 [605]

16/2x4-10/5+6

8x4-10/5+6

32-10/5+6

32-2+6

30+6

3 0

3 years ago

Helium decays to form lithium. 6 2 he → 6 3 li 0 -1 e this type of nuclear decay is called .

PSYCHO15rus [73]

To understand this question, we need some knowledge on radioactive decay. This type of nuclear decay is called a beta decay

<h3>Beta Decay</h3>

This is the process where a radioactive material is fired or naturally emits a beta particle which is equivalent to the lose of an electron and spontaneously becomes an entirely different element.

$^6_2He \to ^6_3 Li + ^0_-_1e$

The participating actors in this nuclear reaction are

helium
lithium
electron

This is the decay process of helium particle in which it became a lithium particle and emitted an electron in the process.

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2 years ago