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Firlakuza [10]
3 years ago
15

The speed of 10 Ferris wheels is sampled. The speed, measured in miles per hour, are 10, 10, 12, 14, 10, 9, 8, 14, 12, 15 What i

s the best estimate of the population mean for the speed of a Ferris wheel?
Mathematics
2 answers:
liq [111]3 years ago
5 0
Are u in k12? i didnt get it too
Kruka [31]3 years ago
5 0

Here, we calculate the mean of the given sample to get the sample mean. We can then say that the sample mean calculated is a point estimate for the population mean

However some error can take place since we are using only a subset of the population to calculate the point estimate for the population mean. This error is called as sampling error. This would be the best estimate for the population mean

Sample mean speed of the Ferris wheel is = average of all the 10 individual values = (10+10+12+14+10+9+8+14+12+15)/10 = 11.4 miles per hour

Best estimate for population mean = 11.4 miles per hour

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Ninety percent of recent car buyers say safety was an important factor in their purchase. Yet of these car buyers, only half con
Tresset [83]

Answer:(E) Anyone to whom safety is an important factor in purchasing a car will consult an objective source of vehicle safety information before buying.

Step-by-step explanation: Safety is a term which means the various steps and Activities and processes taken or put in place in order to prevent hazard or damages to an individual,a group of persons,the environment or properties.

FOR SAFETY OBJECTIVE INFORMATION IS A KEY FACTOR WHICH IS NEEDED TO EFFECTIVELY TAKE THE APPROPRIATE STEPS TO PREVENT OR MITIGATE ANY RISKY OR HAZARDOUS SITUATION OR MATERIALS.

6 0
3 years ago
Please help me with this
Andre45 [30]

Answer:

B

Step-by-step explanation:

Divide one sample of jumping jacks by each girl by their time to find the unit rate. Then compare unit rates. Recall, a unit rate is the number of jumping jacks done in one minute. Cortney does 15 jumping jacks in 1 minute in the first entry of the table. Mallory does 60 jumping jacks in 5 minutes according to a point on the graph. Divide 60/5=12. She does 12 jumping jacks per minute. Thus Cortney does 3 more per minute.

8 0
3 years ago
Chuck and Holly are saving money to buy a car. Chuck has $500 already and is going to save $100 a month. Holly has $1000 and pla
erastovalidia [21]

Answer:

10 months

Step-by-step explanation:

Step one

Given

Chuck has $500

Chuckle wants to save $100 monthly

Let the number of months be x

And the total be y

So

Y=500+100x--------1

Holy has $500

Chuckle wants to save $500 monthly

Let the number of months be x

And the total be y

So

Y=1000+50x--------2

Equate 1 and 2

500+100x=1000+50x

1000-500=100x-50x

500=50x

x=500/50

x=10

7 0
2 years ago
Which of the following is the product of the rational expressions shown below ? (x + 3)/(x + 2) * (x - 3)/(x - 2)
Molodets [167]

Answer:

Option D : \frac{x^2-9}{x^2-4} is the correct answer.

Step-by-step explanation:

Given rational expression is:

\frac{x+3}{x+2}*\frac{x-3}{x-2}

In the first step of solving the rational expression, we will multiply the nominators and denominators.

\frac{(x+3)(x-3)}{(x+2)(x-2)}

\frac{x^2-3x+3x-9}{x^2-2x+2x-4}

Now we will solve the alike terms.

\frac{x^2-9}{x^2-4}

The product of rational expression is \frac{x^2-9}{x^2-4}

Hence,

Option D : \frac{x^2-9}{x^2-4} is the correct answer.

8 0
3 years ago
Need help on this please
Alex17521 [72]

Answer:

(x+8) ² + y^{2} = 64

6 0
3 years ago
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