Given a mean of 43.8 and a standard deviation of 8.7, what is the z-score of the value 40 rounded to the nearest tenth?

Answers

Answer 1

Answer: For the answer to the question above,
Sample mean is given by,

x = (1/n)∑x˅i .... ˅ means sub

x = (1/5)(60 + 40 + 35 + 45 + 39)
= 43.8

z-score is given by,

z = (X - μ)/σ .... μ is population mean, σ is the standard deviation

z = (43.8 - 43.8)/8.7
= 0
so the answer is zero
I hope my answer helped you.

Answer 2

Answer:

Answer:

-.4

Step-by-step explanation:

z score = value-mean / standard deviation

z score = 40-43.8 / 8.7

-.436 = 40-43.8 / 8.7

-.436 to nearest 10th -.4

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Graph the line for this problem: y=3x+6

Answers

$y=3x+6\n\nfor\ x=0\to y=3\cdot0+6=6\to A(0;\ 6)\n\nfor\ x=-2\to y=3\cdot(-2)+6=-6+6=0\to B(-2;\ 0)$

$y=3x+6 \n \nx=0 \n \ny=3*0+6\n \ny=6 \n \nA(0,6)$

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If 4x - 3 = 5, then x=

Answers

Answer:

x=2

Step-by-step explanation:

4x-3=5

4x-3 plus 3 and 5 plus 3

4x=8

Divide both sides by 4

x=2

Answer:

X = 2

Step-by-step explanation:

This is how I got the answer:

Move constant to the right-hand + change signs

4x = 5 + 3

add

4x =5 + 3

4x = 8

Divide by both sides to get the answer of;

X = 2

Predict the number of kilograms in harvest 5.After each harvest, Gloria records the
farm's rice production (in kilograms):
Enter the correct answer.
Harvest
Kilograms
DONE
?
اس اس ام اس
350
700
1400
2800

Answers

Answer:

5600

Step-by-step explanation:

It seems to be multiplying by 2 each harvest, 350*2=700, 700*2=1400, and 1400*2=2800, so logically, the next harvest will be 2800*2, which is 5600.

Turner's scores for nine video games are 140, 180, 200, 170, 180, 150, 160, 130, and 121. The mean, median, and mode of his scores are given below.mean = 159
median = 160
mode = 180
Which value gives Turner's game average?

Answers

Answer:

The mean gives Turner’s game average.

Step-by-step explanation:

The median describes the number in the middle from lowest to greatest. The mode describes the number that appears the most. The mean describes the average of the data set.

What it's the value of the expression 8 times 9-7+4 times 5

Answers

8 times 9 - 7 + 4 times 5

Use PEMDAS. Parentheses, Exponent, Multiply, Divide, Add, Subtract

Multiply:
8 times 9 = 72
4 times 5 = 20

72 - 7 + 20

Add:
72 + 20 = 92

Subtract:
92 - 7 = 85

8 times 9 - 7 + 4 times 5 is equal to 85.

The answer is 85 because you have to use PEMDAS

Simplify the expression
49 $(1)/(2)$

Answers

To convert a mixed fraction into an improper fraction:

$a(b)/(c) =((a\cdot c)+b)/(c)$

$49 (1)/(2) = ((49\cdot 2)+1)/(2) = (98 +1)/(2) = \boxed{\bf{(99)/(2)}}$

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