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iogann1982 [59]
1 year ago
11

How can I Estimate the mean length. How can I select the modal class ?

Mathematics
1 answer:
Alekssandra [29.7K]1 year ago
3 0

Answer:

To estimate the mean length.

From the table lengths and its corresponding frequency are given

we know that,

The mean formula is defined as the sum of the observations divided by the total number of observations.

The formula to calculate the mean of grouped data. The formula is,

m=\frac{\sum^fx_i}{\sum^f}

we get, Midpoint of the intervals are,

0.95, 2.95, 4.95, 6.95, 8.95, 10.95

Mean is,

=\frac{0.95\times3+2.95\times33+4.95\times62+6.95\times49+8.95\times36+10.95\times7}{3+33+62+49+36+7}

we get,

=\frac{1146.5}{190}=6.034

Answer is: 6.034

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Answer:

10 degrees Celsius

Step-by-step explanation:

So, the question is asking for the difference between -8 and 2.

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Explanation 1:

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Explanation 2:

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3 years ago
Two students walk in the same direction along a straight path, at a constant speed - one at .90 m/s and the other at 1.90 m/s.a.
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Answer:

a)The second student arrive 7 minutes and 36 seconds sooner

b)They have to walk 598,51 m

Step-by-step explanation:

Speed= Distance/Time

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Second student

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Time¹= Time² + 5.50 min

5.50 min =350 seconds

Time²  =Speed¹ x Time¹ /Speed²

Time²  =Speed¹ x (Time² + 350 seconds  ) /Speed²

Time²  =0.9 x (Time² + 350 seconds  ) /1.9

Time²  =0,4737 x (Time² + 350 seconds  )

Time²  =0,4737 Time² + 165,79 seconds

Time²  - 0,4737 Time² = 165,79 seconds

0,5263 Time² = 165,79 seconds

Time² = 165,79 seconds/0,5263 =315,01 seconds

Distance=1,9 x 315,01 seconds = 598,51 m

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