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Yuri [45]
3 years ago
5

Chin researched the amount of money 150 students earned per month from jobs held during the summer. He created a table of six sa

mple means from his collected data. Sample Number Sample Mean ($) 1 208 2 235 3 245 4 207 5 205 6 210 Using his results, what is a valid prediction about the mean of the population?
Mathematics
2 answers:
dem82 [27]3 years ago
8 0

the choices are below

the predicted mean of the population will be less than 200.

The predicted mean of the population will be less than 245.

The predicted mean of the population will be more than 275.

The predicted mean of the population will be more than 250.

b is the answer

likoan [24]3 years ago
3 0

Answer:

the predicted mean will be less than 245

Step-by-step explanation:

For ungrouped data

mean can be calculated using formula

sum of all observations/total no of observations

For grouped data

mean (x)= £f(x)/n

n represents the frequency

You might be interested in
two runners start 30kilometer apart and run toward each other. they meet after 3hours. One Runner runs 2 kilometers per hour fas
belka [17]

Let the slower runners speed be X kilometers per hour.

Then the faster runners speed would be X+2 kilometers per hour.


The formula for distance is Speed times time.

The distance is given as 30 kilometers and time is given as 3 hours.


Since there are two runners you need to add the both of them together.

The equation becomes 30 = 3x + 3(x+2)

Now solve for x:

30 = 3x + 3(x+2)

Simplify:

30 = 3x + 3x +6

30 = 6x + 6

Subtract 6 from each side:

24 = 6x

Divide both sides by 6:

x = 24/6

x = 4


The slower runner ran at 4 kilometers per hour.

The faster runner ran at 4+2 = 6 kilometers per hour.


3 0
3 years ago
Find an equation of the line that satisfies the given conditions.<br> Through (-3, -4); slope -5/2
Wittaler [7]

Answer:

y = - 5/2x - 23/2

Step-by-step explanation:

b = y - (slope)(x)

b = -4 - (-5/2)(-3)

b = -4 - 15/2 = - 23/2

y = -5/2x - 23/2

3 0
2 years ago
What inequality describes the solutions of 2y less than or equal to 8?
In-s [12.5K]

Answer:

*View attached graph*

Step-by-step explanation:

2y\leq 8

/2  /2

y\leq 4

Hope this helps!

4 0
2 years ago
4. What is the volume of the cylinder? Express answer in terms of a (hold and
Vladimir [108]

Given:

Base area = 4π mm²

Height = 10 mm

To find:

The volume of the cylinder.

Solution:

Base of the cylinder is circle.

Area of the base = πr²

πr² = 4π

Volume of the cylinder = πr²h

Substitute 4π in place of πr².

                                      = 4π × 10

                                      = 40π mm³

The volume of the cylinder is 40π mm³.

4 0
3 years ago
Which expression is a factor of 10x^2+11x+3
Ulleksa [173]

Answer:

The factors are (5x + 3) and (2x + 1)

Step-by-step explanation:

When you need to factor a quadratic, and the coefficient of the x² is not 1, use the slide and divide method.

The general form of a quadratic is ax² + bx + c

Factor:  10x² + 11x + 3

Here a = 10, b = 11, and c = 3

Step 1:  Multiply ac, we SLIDE a over to c.  Notice the 10 is gone for now..

    x² + 11x + 30

Step 2:    Factor this   (this step will always factor)

  x² + 11x + 30 = (x + 5)(x + 6)

So the factors are  (x + 5)(x + 6), but we now need to DIVIDE by a, since we multiplied it into c before.  We divide the constants in the factors...

   (x + 5/10 )(x + 6/10 )  

Now reduce the fractions as much as possible...

(x + 1/2 )(x + 3/5)

*If they don't reduce to a whole number, SLIDE the denominator over as a coefficient of x....

(2x + 1)(5x + 3)        *2 slide over in front of x, 5 slide over in front of x, the fractions are gone!

These are our factors!

5 0
3 years ago
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