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arsen [322]
2 years ago
9

A boat traveled 36 miles in 1.5 hours and then 14 miles in 0.75 hours. what is the average speed of the boat?

Mathematics
1 answer:
jeka57 [31]2 years ago
7 0
Speed=distance/time
You'll have to combine like terms.
36+14=50
1.5+0.75=2.25

And then you can use the formula.
50/2.25

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Question on Statistics and Confidence Intervals
Digiron [165]

The phrasing "nine times out of ten" means 9/10 = 0.90 = 90% is the confidence level. We're confident 90% of the time that the confidence interval captures the population parameter we're after (in this case mu = population mean)

The portion "have an average score within 5% of 75%" means that 75% = 0.75 is the center of the confidence interval, and it goes as low as 0.75 - 0.05 = 0.70 and as high as 0.75 + 0.05 = 0.80

This confidence interval is from 70% to 80%, meaning that nine times out of ten, we're confident that the average score is between 70% and 80%

We write the confidence interval as (0.70, 0.80). It's common to use the notation (L, U) to indicate the lower (L) and upper (U) boundaries. You might see the notation in the form L < mu < U. If so, then it would be 0.70 < mu < 0.80; either way they mean the same thing.

The margin of error is 0.05 as its the 5% radius of the interval. It tells us how far the most distant score is from the center (75%)

=========================================

In summary, we have these answers

  • confidence level = 90%
  • margin of error = 5% = 0.05
  • confidence interval = (0.70, 0.80)
  • interpretation = We're 90% confident that the average exam score is between 0.70 and 0.80
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Step-by-step explanation:

day during a two-week period. The

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o

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CLEAR ALL

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Which statement best describes the y-intercept of the graph?

< PREVIOUS

O 3

Os Oo Or

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HH

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