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Bjork Larsen was trying to decide whether to use a new racing wax for cross-country skis. He decided that the wax would be worth the price if he could average less than 55 seconds on a course he knew well, so he planned to test the wax by racing on the course 8 times. His 8 race times were 56.3, 65.9, 50.5, 52.4, 46.5, 57.8, 52.2, and 43.2 seconds. Should he buy the wax? Explain.

Respuesta :

ismaelconeme

Answer:

Yes, he should buy it

Step-by-step explanation:

You need to calculate the average time using all the data you have. Remember that to calculate the mean you need to add up all the numbers and then divide by how many numbers you have (in this case 8)

[tex]\bar{x} = \frac{56.3+65.9+50.5+52.4+46.5+57.8+52.2+43.2}{8} = 53.1[/tex]

The average is less than 55 so he should buy it

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