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3 years ago

The tables below show four sets of data:

Mathematics

2 answers:

LUCKY_DIMON [66]3 years ago

4 0

Answer:

Set A, Give the other person brainliest, They explained it well and helped me a lot, Thanks!

Step-by-step explanation:

Temka [501]3 years ago

3 0

The answer would be set A because Set B start low on both, Set C Starts low on one and high on another but also has decimals, set D starts both low. So your answer would be A.

I also know because I took the test and that is the answer I did ans it said it was correct.

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Evgen [1.6K]

I think it's 9.68 but I might be wrong

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3 years ago

The legs of a right triangle measure 6 inches and 9 inches. If is the angle between the 6-inch leg and the hypotenuse, sin = ___

mr Goodwill [35]

First find the length of the hypotenuse using pythagorean theorem
<span>c^2 = 5^2 + 7^2
c^2 = 25 + 49
c^2 = 64
c=8 (take the square root in both sides)
Since sin = opposite/hypotenuse,
sin = 5/8 = 0.625</span>

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3 years ago

The sum of the fractions 2/y-3 and 6/y+3 is equal to their

Sphinxa [80]

Step-by-step explanation:

Move expression to the left side and change its sign

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Factor out

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Distribute

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Collect the like terms

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Determine the sign of the fraction

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When the quotient of expressions equals

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Move the constant,

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Change the signs on both sides of the equation

Check if the solution is in the defined range

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∴

6 0

3 years ago

Read 2 more answers

Evaluate the expression when x = 4.

gulaghasi [49]

We have 3*4+2, or 14, by substituting in for x.

4 0

3 years ago

People tend to evaluate the quality of their lives relative to others around them (Frieswijk et al., 2004). In one study, resear

Alborosie

Answer:

Step-by-step explanation:

Hello!

Research.

n=9 frail elderly were interview and compared to a fictitious person who was worse off then the interviewee, a life-satisfaction score was determined for each person.

18, 23, 24, 22, 19, 27, 23, 26, 25

Assuming that the population average score is μ= 20, the researchers think that the elderly in the sample are more or less satisfied than others in the general population.

a. You have the information of one sample, assuming this sample has a normal distribution and each elderly interviewed is independent, then the t-test of choice is a one-sample t-test.

b. and c. If you say that the elderly are "more or less" satisfied than the others, this means that they are either as satisfied as to the general population or not satisfied as to the general population. Symbolically:

H₀: μ = 20

H₁: μ ≠ 20

This is a two-tailed test, meaning, you will have two critical regions.

α: 0.05

Left critical value: $t_{n-1;/\alpha 2} = t_{8; 0.025}= -2.306$

Right critical value: $t_{n-1;1-\alpha /2} = t_{8;0.975} = 2.306$

$t_{H_0}= \frac{X[bar]-Mu}{\frac{S}{\sqrt{n} } } ~t_{n-1}$

X[bar]= 23

S= 3

$t_{H_0}= \frac{23-20}{\frac{3}{\sqrt{9} } }= 3$

Considering that the calculated t-value is greater than the right critical value, the decision is to reject the null hypothesis, so using a significance level of 5% you can conclude that the average life-satisfaction score of the elderly is different than 20.

I hope it helps!

7 0

3 years ago