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HACTEHA [7]
3 years ago
6

Samples of size n = 600 are taken from a telephone survey, and the mean age is taken for each sample. What is the distribution o

f the sample means?
A. skewed to the left
B. normal (approximately)
C. not enough information provided
D. skewed to the right
Mathematics
1 answer:
Nonamiya [84]3 years ago
6 0
The answer in B. For complicated statistics reasons the Central Limit Theorem states that, for sample sizes of above 25 (or 30 depending on the text!), the distribution of sample means is approximately normal regardless of the distribution of the parent distribution
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Construct an equation for the expression: 3 less than 2 times a number is 7. Show the solution to the equation and prove your so
ElenaW [278]

Answer:

5 x 2 -3 = 7

Step-by-step explanation:

i mean.... thats all

4 0
3 years ago
Kebdra has a bag containing 15 marbles. She has 3 white, 8 red, 3 blue 1 green. She randomly picks a marble from the bag and the
prohojiy [21]

Answer:

8/15

Step-by-step explanation:

because there are 8 red marbles out of 15 marbles

5 0
3 years ago
a chef uses 5 2/5 pounds of ground beef to make a hamburger and 2 1/4 pounds of ground beef to make meatloaf. the ground beef co
Lisa [10]

Answer:

16 packages

Step-by-step explanation:

5 2/5 + 2 1/4  Use the common denominator of 20

5 8/20 + 2 5/20  

7  13/20

I know that I will need 14 packages for the 7 pounds.  For the fraction part, 10/20 would be half, so I would need to buy a half pound for that, but I need 13/20 which would be more than a half pound, so I will need to buy 2 more pounds for the fraction part.

14 + 2 = 16

8 0
1 year ago
100 points and brainest Plz help me PLZ
svp [43]

Answer:

○ C. The lines are perpendicular.

Step-by-step explanation:

In order for equations to be perpendicular, their <em>rate of changes</em> [<em>slopes</em>] must be OPPOSITE <em>MULTIPLICATIVE</em><em> </em><em>INVERSES</em>, which in this case is so:

− to +}

> OPPOSITE

+ to −}

MULTIPLICATIVE INVERSE [RECIPROCAL]

I am joyous to assist you at any time.

8 0
3 years ago
Read 2 more answers
Solve the system of equations by substitution: y = x - 2
gizmo_the_mogwai [7]

Step-by-step explanation:

y = x - 2

x + y = 12

Substitute the first expression for y into the second equation.

x + (x - 2) = 12

2x - 2 = 12

2x = 14

x = 7

Now plug into either equation to find y.

y = 7 - 2

y = 5

So the solution is (7, 5).

4 0
3 years ago
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