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gayaneshka [121]
2 years ago
10

A social psychologist interested in cultural differences compared women of two ethnic groups on a Role Approval Index on which h

igh scores indicated high degrees of approval of one's own social role. The results were as follows.
Ethnic Group A: N=15, M=55, S2=6.5

Ethnic Group B: N=23, M=51, S2=4.5

If the standard deviation of the distribution of the difference between means is .76, what is the t score?

a. 5.26 b. -10.53 c. -8.00 d. 4.18
Mathematics
1 answer:
Levart [38]2 years ago
3 0

Answer:

a. 5.26

Step-by-step explanation:

As, the standard deviation of the distribution of the difference between mean is 0.76 so the t score will be simply calculated by dividing the difference of means by standard deviation of the distribution of the difference between mean as hypothesized difference is zero.

t score=Xbar A- Xbar B/Sd of difference of means

t score=55-51/0.76

t score=4/0.76=5.26

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1. 6, 290,000 = 6, 300, 000
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6 0
3 years ago
Question 6 (5 points)
AleksAgata [21]

Answer:

(26,-2)

Step-by-step explanation:

For any two points on coordinate plane (x1,y1) and ( x2,y2)

coordinate of midpoint is given by (x1+x2)/2 , (y1+y2)/2

Given

(x1,y1) = (-4,-8)

midpoint : (11,-5)

let other point be x2 and y2

therefor by using formula for midpoint coordinate given above we have

midpoint : (11,-5) = (-4+x2)/2 , (-8+y2)/2

Hence point

11 will be equivalent to (-4+x2)/2

11 = (-4+x2)/2

=> 11*2 = -4+x2

=>22 + 4 = x2

=>x2 = 26

similarly

-5 will be equal to (-8+y2)/2

-5 = (-8+y2)/2

=> -5*2 = -8+y2

=> -10 + 8 = y2

=> y2 = -2

Therefore coordinates of other point is  (26,-2).

5 0
3 years ago
Evaluate the following for f(x) = 3(2)^x<br><br>1. f (2) =<br><br>2. f (-1) =<br><br>3. f (10) =​
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Answer:

1. f (2) = 3 x 2^x-1  

2. f (-1) = -3 x 2^x

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Step-by-step explanation:

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Answer:

b the second 1

Step-by-step explanation:

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What is the value of the expression below? (4/5+3/5)+3.5x5<br>​
lisov135 [29]

Answer:

18.9

Step-by-step explanation:

Start with parentheses.

4/5 + 3/5 = 7/5

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Next numbers.

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Add.

17.5 + 1 2/5 = 18.9

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