A simple random sample of size 37 is drawn from a normal population whose standard deviation is o = The sample mean is = 33.1. a.) Construct a 80% confidence level for u. (Round answers to two decimal place.) margin of error: lower limit: upper limit: b.) If the population were not normally distributed, what conditions would need to be met? (Select all t apply.)

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A simple random sample of size 37 is drawn from a normal population whose standard deviation is o = 2.3.
The sample mean is a = 33.1.
a.) Construct a 80% confidence level for u. (Round answers to two decimal place.)
margin of error:
lower limit:
upper limit:
b.) If the population were not normally distributed, what conditions would need to be met? (Select all that
apply.)
Oo is unknown
| simple random sample
| large enough sample size n
o is known
| systematic sampling
the population needs to be uniformly distributed
O the population needs to be normally distributed
O O O
Transcribed Image Text:A simple random sample of size 37 is drawn from a normal population whose standard deviation is o = 2.3. The sample mean is a = 33.1. a.) Construct a 80% confidence level for u. (Round answers to two decimal place.) margin of error: lower limit: upper limit: b.) If the population were not normally distributed, what conditions would need to be met? (Select all that apply.) Oo is unknown | simple random sample | large enough sample size n o is known | systematic sampling the population needs to be uniformly distributed O the population needs to be normally distributed O O O
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