8. Let x be a random variable that represents the hemoglobin count (HC) in human blood (measured in grams per milliliter). In healthy adult females, x has an approximately normal distribution with a population mean of µ =14.2, and population standard deviation of o = 2.5. Suppose a female patient had 10 blood tests over the past year, and the sample mean HC was determined to be = 15.1. With a level of significance a = .05 determine whether he patient's HC is higher than the population average.

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8. Let x be a random variable that represents the hemoglobin count (HC) in human
blood (measured in grams per milliliter). In healthy adult females, x has an
approximately normal distribution with a population mean of µ =14.2, and
population standard deviation of o = 2.5. Suppose a female patient had 10 blood
tests over the past year, and the sample mean HC was determined to be x= 15.1.
With a level of significance a = .05 determine whether he patient's HC is higher
than the population average.
16
étv
F3
DIL
F4
F6
7
8
R
Transcribed Image Text:8. Let x be a random variable that represents the hemoglobin count (HC) in human blood (measured in grams per milliliter). In healthy adult females, x has an approximately normal distribution with a population mean of µ =14.2, and population standard deviation of o = 2.5. Suppose a female patient had 10 blood tests over the past year, and the sample mean HC was determined to be x= 15.1. With a level of significance a = .05 determine whether he patient's HC is higher than the population average. 16 étv F3 DIL F4 F6 7 8 R
7. A random sample of 14 candy store franchises had a mean start up cost of
x = $100 and s = $20. Find a 90% confidence interval for the population average
start-up cost u for candy store franchises. Assume xhas a distribution that is
approximately normal.
Answer: The confidence interval is
16
tv
80
F3
F4
F5
F6
F8
Transcribed Image Text:7. A random sample of 14 candy store franchises had a mean start up cost of x = $100 and s = $20. Find a 90% confidence interval for the population average start-up cost u for candy store franchises. Assume xhas a distribution that is approximately normal. Answer: The confidence interval is 16 tv 80 F3 F4 F5 F6 F8
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