Math 227 - Statistics » Fall 2020 » Sec 8.1 Quiz
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Question #1
A random sample of 187 full-grown lobsters had a mean weight of 19 ounces and a standard deviation of 3.3 ounces. Construct a 98% confidence interval for the population mean μ.
A.
17 oz < μ < 19 oz
B.
19 oz < μ <21 oz
C.
18 oz < μ < 21 oz
D.
18 oz < μ <20 oz
Question #2
How many women must be randomly selected to estimate the mean weight of women in one age group. We want 90% confidence that the sample mean is within 3.4 lb of the population mean, and the population standard deviation is known to be 25 lb.
A.
147
B.
148
C.
142
D.
146
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