1. Dr. Edgar Anderson was a botanist who collected vast amounts of data for several species of wild iri For a sample of 50 Iris:

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7.1: #1-2
E=z (0/Vn)
n= (0/E)
1. Dr. Edgar Anderson was a botanist who collected vast amounts of data for several species of wild iris.
For a sample of 50 Iris:
a. The sample mean petal length was 5.55cm with a standard deviation of .57 cm. Compute an 85%
confidence interval for the population mean petal length.
, Zc
E =
interval:
to
b. The sample mean petal width was 2.03cm with a standard deviation of .27 cm. Compute a 90%
confidence interval for the population mean petal width.
E =
, interval:
to
2. A random sample of 83 reconstructed clay vessels from the Turquoise Ridge archaeological site
indicated the standard deviation of diameters to be approximately 5.5cm. How many (total) and how
many more clay vessels must be found and reconstructed to be 95% sure that the sample mean of
diameters is within 1cm of the population mean of all such reconstructed clay vessels?
m/u/0/h
more
h
m
Transcribed Image Text:7.1: #1-2 E=z (0/Vn) n= (0/E) 1. Dr. Edgar Anderson was a botanist who collected vast amounts of data for several species of wild iris. For a sample of 50 Iris: a. The sample mean petal length was 5.55cm with a standard deviation of .57 cm. Compute an 85% confidence interval for the population mean petal length. , Zc E = interval: to b. The sample mean petal width was 2.03cm with a standard deviation of .27 cm. Compute a 90% confidence interval for the population mean petal width. E = , interval: to 2. A random sample of 83 reconstructed clay vessels from the Turquoise Ridge archaeological site indicated the standard deviation of diameters to be approximately 5.5cm. How many (total) and how many more clay vessels must be found and reconstructed to be 95% sure that the sample mean of diameters is within 1cm of the population mean of all such reconstructed clay vessels? m/u/0/h more h m
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