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alliesnowwhiteozbz5m alliesnowwhiteozbz5m
  • 20-01-2019
  • Mathematics
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A set of data has a normal distribution with a mean of 50 and a standard deviation of 6. What percent of the data should be less than 50?

A set of data has a normal distribution with a mean of 50 and a standard deviation of 6 What percent of the data should be less than 50 class=

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rejkjavik rejkjavik
  • 20-01-2019

Answer:

The percent of the data should be less than 50 is 50%

Step-by-step explanation:

we are given

mean=50

[tex]\mu=50[/tex]

standard deviation is 6

[tex]\sigma=6[/tex]

and

x=50

so, we can use formula

[tex]z=\frac{x-\mu}{\sigma}[/tex]

now, we can plug values

[tex]z=\frac{50-50}{6}[/tex]

[tex]z=0[/tex]

Since, the data should be less than 50

so,

[tex]z<0[/tex]

now, we can use normal distribution table

we get

[tex]P(z<0)=0.50[/tex]

So,

The percent of the data should be less than 50 is 50%

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