Question

2 more problems and ill be done plz help!!!!

the mean value of land and buildings per acre from a sample of 75 farms is $1500, with a standard deviation of $200. the data set has a normal distribution. estimate the number of farms whose land and building values per acre are between $1100 and $1900.

round to the nearest whole number as needed.

Answer 1

1100 is 2 standard deviations below the mean, 1900 2 stdev above. This means that approximately 95.4% of all sampled data falls within this range.

95.4% of 75 is 71.55; but obviously you can't have '0.55' of a farm, so I'd likely round to 72.

Answer 2

it said its the wrong answer
:(

Answer 3

Then try 71?

Answer 4

its definitely 71 or 72

Answer 5

its 71 thank u so much!

Answer 6

Cool =)

Answer 7

what does a normal distribution mean?
having discrete data?

Answer 8

how were you able to give a solid figure of 95.4%?
thank you

Answer 9

Look up the normal distrubition and standard deviation, salini. The "bell-curve fit" shows how the data lies, and that 95.4% of it lies within two standard deviations of the mean. It's a common method used in statistics.

Answer 10

The mean of land and building per acre from a sample off 70 farms is $1600, with a standard deviation of $300.

Answer 11

the mean value of land and buildings per acre from a sample of farms is $1600 with a standard deviation of $200.

Answer 12

the mean value of land and buildings per acre from a sample of farms is $1600 with a standard deviation of $200.

Answer 13

the mean value of land and buildings per acre from a sample of farms is $1500, with a standard devaition of $200.

Answer 14

I collect data and I figure out the average value by adding up all the data points and dividing by the number of data points.

Answer 15

I collect data and I figure out the average value by adding up all the data points and dividing by the number of data points.

Answer 16

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Answer 18

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Answer 19

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