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lubasha [3.4K]
2 years ago
12

Will mark brainliest

Mathematics
1 answer:
Arlecino [84]2 years ago
3 0

Answer:

17

Step-by-step explanation:

D = 8.5 miles/h x 2h

  = 17 miles

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Question in attachment
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The range within 1 standard deviation :155.12 ,328.38

Step-by-step explanation:

Data: 338+160+210+180+166+272+128+409+240+250+160+300+340+200+194+132+202+180+420+380+325+185+233+198

Mean = \frac{\text{Sum of all observations}}{\text{No. of observations}}

Mean =\frac{338+160+210+180+166+272+.........+233+198}{24}

Mean =241.75

\text{Standard deviation} = \sqrt{\frac{\sum(x-\bar{x})^2}{n-1}}

Standard deviation = \sqrt{\frac{(338-241.75)^{2}+(160-241.75)^{2}+......+(185-241.75)^{2}+(233-241.75)^{2}+(198-241.75)^{2}}{24-1}}

Standard deviation =86.63

Range within 1 standard deviation :(\mu-\sigma,\mu+\sigma)

Range within 1 standard deviation :(241.75-86.63,241.75+86.63)

Range within 1 standard deviation :155.12 ,328.38

Hence The range within 1 standard deviation :155.12 ,328.38

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