The value of the z score is 1.03.
According to the statement
we have given that the value of mean and standard deviation and we have to find the value of the z score.
So, For this purpose we know that the
Z-score indicates how much a given value differs from the standard deviation. The Z-score, or standard score, is the number of standard deviations a given data point lies above or below mean.
And the given values are:
mean value = 69 inches
s.d value = 2.8 inches
And the value of x is 71.9 inches.
So, The Z score is
z = x - mean / standard deviation
substitute the values in it then
z = 71.9 - 69 / 2.8
then
z = 2.9 /2.8
z = 1.03
So, The value of the z score is 1.03.
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Answer:
6 students.
Step-by-step explanation:
let the number of students in class be<em> x</em>
Since Half of the class represents half of the students, therefore
Number of student who got A in test = 
Now if one more student got A in test then the number of students who got A in test will be 
Now according to equation,
Further solving
Hence the total number of students in class is 6.
Answer:
A)
Step-by-step explanation:
Order the set first
27, 28, 35, 37, 43, 47
Median now is: 36 (which is the mean between 35 and 37, the two central numbers )
If you add A) 35,50 then you will still have to compute the mean between 35 and 37 in order to find the median, because you have:
27,28,35,35,37,43,47,50
The temperature 6 hours after day break is 53 degrees
Step-by-step explanation:
The temperature was 65 degrees at daybreak. Then it dropped two degrees per hour until dusk. This decrease in temperature can be modeled by the equation,
y = -2x + 65
according to this equation
y= temperature after day break
x= no of hours ( in this case 6)
So equation becomes
y= -2 (6) +65
y= 65- 12
y= 53 degrees
So the temperature 6 hours after day break is 53 degrees
Keywords: Algebra
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18/27
=2/3
*As 9/27=1/3, 18/27=2/3, 27/27=3/3.
