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Mr. Gregory White
Mr. Gregory White, Master's Degree
Category: Math Homework
Satisfied Customers: 92
Experience:  M.A., M.S. Education / Educational Administration
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I have a statistics assignment due at midnight and am having

Customer Question

Hi, I have a statistics assignment due at midnight and am having trouble with the subject. I'm trying to understand some of these confidence interval problems
JA: The Math Tutor can help you get an A on your homework or ace your next test. Tell me more about what you need help with so we can help you best.
Customer: Allen's hummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther.† Suppose a small group of 15 Allen's hummingbirds has been under study in Arizona. The average weight for these birds is x = 3.15 grams. Based on previous studies, we can assume that the weights of Allen's hummingbirds have a normal distribution, with σ = 0.32 gram.
Find an 80% confidence interval for the average weights of Allen's hummingbirds in the study region. What is the margin of error? (Round your answers to two decimal places.)
lower limit
upper limit
margin of error
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Customer: No I just need help with about 25 questions
Submitted: 11 days ago.
Category: Math Homework
Expert:  Sandhya_sharma replied 11 days ago.


Customer: replied 11 days ago.
hello, could you please help me with this question?
Expert:  Sandhya_sharma replied 11 days ago.

I have just noticed you are subscription customer. Please disable subscription so that I can help.

Customer: replied 11 days ago.
no thank you, messaging is fine
Expert:  Sandhya_sharma replied 11 days ago.

Please send all the questions.