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Irina18 [472]
2 years ago
7

A set of data has a mean of 12 and a standard deviation of 3. A data point of the set has a z-score of 1.3. What does a z-score

of 1.3 mean?
Mathematics
1 answer:
NISA [10]2 years ago
3 0
A z-score tells you how many standard deviations a point is from the mean.
z = \frac{x - mean}{std dev}
Working backwards with this formula,
x = z*std dev + mean \\  \\ x = 1.3*3 + 12 \\  \\ x = 15.9

So the data point is 15.9 and is 1.3 std deviations from the mean of 12.

Hope this helps.
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what is one clue that lets you know that a math problem requires you to do a two steps multi problem?​
elena55 [62]

Answer:

If there are more than one thing on the x. Let me just show you because I can't really explain it very well, so I'm sorry.

Step-by-step explanation:

5x+23=10

23(x^2)+5=27

There is more than one thing acting on the x to get it into a number.

6 0
3 years ago
The points (6, -3) and (7, -10) fall on a particular line. What is its equation in point-slope form? Use one of the specified po
kumpel [21]

Answer:

Step-by-step explanation:

Given the coordinate points (6, -3) and (7, -10), we are to find the equation of a line passing through this two points;

The standard equation of a line is y = mx+c

m is the slope

c is the intercept

Get the slope;

m = Δy/Δx = y2-y1/x2-x1

m = -10-(-3)/7-6

m = -10+3/1

m = -7

Get the intercept;

Substitute the point (6, -3) and m = -7 into the expression y = mx+c

-3 = -7(6)+c

-3 = -42 + c

c = -3 + 42

c = 39

Get the required equation by substituting m = -7 and c= 39 into the equation y = mx+c

y = -7x + 39

Hence the required equation is y = -7x + 39

6 0
3 years ago
Can you please explain to me how I would solve this problem? Can you please explain/and show all the steps?
Lena [83]
22 = z + (-9) Switch the sides
z = 22 - (-9) Solve
z = 31 So, z = 31
7 0
3 years ago
An array showing the factor pair of three and 6 would have 3 rows of 6 objects. True? Or False?
JulsSmile [24]

Answer:

false

Step-by-step explanation:

3 0
3 years ago
A) What is the domain and range of the graph? (Use the equations editor or explain)
riadik2000 [5.3K]

The domain: -5 < x ≤ 1 and the range: -3 ≤ y ≤ 1 is a function. b)

No, the vertical line crosses the graph in more than one place, therefore, the relation shown is a function.

<h3>What is the domain and range of the function?</h3>

The domain of a function is defined as the set of all the possible input values that are valid for the given function.

The range of a function is defined as the set of all the possible output values that are valid for the given function.

The domain of a relation is the set of values of the independent variable for a defined function.

The domain is the horizontal extent of the graph.

The range of a relation is the set of values of the dependent variable for a defined function.

The range is the vertical extent of the graph.

The vertical line can intersect the graph in at most one place.

a)

This graph extends from x > -5 to x = 1.

The domain

 -5 < x ≤ 1   ------   (-5, 1] in interval notation

This graph extends from y = -3 to y = 1.

The left side of the graph does not include the point (-5, 1), but the right side includes the point (1, 1).

y = 1 is one of the output values of the relation.

The range

 -3 ≤ y ≤ 1 . . . . . . . . [-3, 1] in interval notation

b)

No, the vertical line crosses the graph in more than one place, therefore, the relation shown is a function.

Learn more about the domain and range of the function:

brainly.com/question/2264373

#SPJ1

8 0
2 years ago
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