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Oksi-84 [34.3K]
3 years ago
5

(Pleave give the CORRECT answer, I will give out brainliest to this correct answer. Don't make up something to get brainliest be

cause I will know.)
Suppose that you wanted to estimate the average amount of time a middle school student spends per day exercising. You decide to do this by taking a random sample of students from your school. You will calculate the mean time spent exercising for your sample. You will then use your sample mean as an estimate of the population mean.

Think about your estimate of the average amount of time students spend exercising each day. Given a choice of using a sample of size 30 or a sample of size 50, which should you choose? Explain your answer.
Mathematics
1 answer:
Alex17521 [72]3 years ago
3 0

Answer:

Size 50

Step-by-step explanation:

You should choose the larger sample size.  This is because if you take the mean, it will help to cancel out outliers.  For instance, most people exercise half an hour.  With sample size of 10, there might be one person who doesn't exercise, thus dragging down the mean.  A larger sample size would have a greater ratio of "average" people.

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Jill has a 25% off coupon for some computer software. If the coupon saved her $35, how much would the software cost without the
zysi [14]

Answer:

$140

Step-by-step explanation:

35 times 4

6 0
3 years ago
Paula knows the total cost for 100 students will be $750, and the cost total cost for 150 students is $1050. What is the caterer
Roman55 [17]

Step-by-step explanation:

the price charged for 100 students reflects the cost per student that applies to the order as a whole.

100 * 6 = $600, so the fixed cost is 750-600 = 150.

...

We can check this by substituting in the other equation.

Does 150*6 + 150 = 1050?

150*6=900

900+150 = 1050.

Yes, it does

...

We can express this relationship by the equation:

y = mx + b

where

y = total cost

m = $6 per student

x = number of students

b = fixed costs = 150

y = 6x + 150

8 0
3 years ago
Factor x2 + 29x - 30.
marysya [2.9K]
Ok the w to your question is to cross multiply <span>216=9m m=24

</span>
8 0
3 years ago
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What is the first step in writing f(x) = 6x2 + 5 – 42x in vertex form?
Marat540 [252]
F(x) = 6x² + 5 - 42x

first step in writing the f(x) in vertex form? WRITE THE FUNCTION IN STANDARD FORM.

f(x) = 6x² - 42x + 5

Exponents must be in decreasing order. 
7 0
3 years ago
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A jewelry maker has 24 jade beads and 30 teak beads. What the the greatest number of necklaces she can make? How many beads of e
Darya [45]
Find the GCF of 24 and 30

  24                30
1×24              1×30
2×12             2×15
3×8               3×10
4×6               5×6

The common factors are 1, 2, 3, and 6

That means we can make 6 necklaces, each necklace with 4 jade beads and 5 teak beads. 

8 0
3 years ago
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