Answered: at separate locations. She wonders if… | bartleby

A First Course in Probability (10th Edition)

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question

Ciara, an ornithologist (a person who studies or is an expert on birds.), has 4 bird
feeders at separate locations. She wonders if birds are equally
likely to visit each of the feeders (each expected proportion to be
25%). She recorded data for a sample of 350 recent visits. Here
are the results:
HINT: Use Rguroo: Analysis-> analytics-> Goodness of Fit:
Make 4 levels (categories) - complete observed counts using the values in the table - for null
probabilities check Ho
Feeder
#1 #2 #3
Observed visits 80 90 92
If Ciara performs a goodness-of-fit, can she determine if these
results suggest that birds visit one specific feeder is different or
the same from the other feeders. Test at 5% significance level.
Ho P1 P2 P3 = P4 = 25%
Ha: At least one proportion is different than expected.
a) The value of the observed test statistic is Xobserved
Round to two decimal places.
#4
88
b) The Xcritical
c) Result: Since Xobserved
the null. (use the operations ">" or "<" or "=").
Round to two decimal places.
Xcritical we fail to reject

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