Question: Hello I need help with this problem! You collected some ecological samples in a field experiment in west Texas.Collected were soil samples to determine the

Hello I need help with this problem!

You collected some ecological samples in a field experiment in west Texas.Collected were soil samples to determine the amount of nutrients that would need to be applied to sustain a desired level of crop growth. The observation was the amount of nutrient the soil contained. Samples were taken from 100 different locations. It was found that the nutrient data are normally distributed. The mean value of the samples was 16 units (the exact name for the units do not really matter in this problem, so just call them "units"). The sample standard deviation of the samples is 3.5 units.

a) What is the probability range for the 50% confidence?

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