# Normal distribution

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#1
Sunflower height is normally distributed mean 185 and standard deviation 10

Determine the probability that the mean height of a random sample of 4 sunflowers is more than 190cm.
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#2
i dont even know where to start
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1 month ago
#3
(Original post by Imperial Majesty)
Sunflower height is normally distributed mean 185 and standard deviation 10

Determine the probability that the mean height of a random sample of 4 sunflowers is more than 190cm.
Do you understand that the mean of a random sample is itself a random variable?

So, let be the mean of the sample. How is it distributed?

Then you will proceed to find
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