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BANA 3363 Unit III questions with complete solutions rated A+
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BANA 3363 Unit III questions with complete solutions rated A+
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BANA 3363 Unit III questions withcomplete solutions rated A+
A company that produces light bulbs wants to test in their new LCD bulb has an average lifespan that
exceeds 5000 hours. To support their claim they have collected a random sample of 76 bulbs and found
the average lifespan of these 76 bulbs was 5,188 hours. The population standard deviation is known to
be 497 hours. The company would like to test their hypothesis using a significance level of 0.05.
Calculate the appropriate test statistic. - correct answer ✔✔3.30
Which one of the following is a valid way to state a Null hypothesis about a population parameter X?
A. X>10
B. X=10
C. x<10
D. all of the above. - correct answer ✔✔X=10
For a fixed sample size, choosing a lower significance level will increase the probability of making a type
II error. - correct answer ✔✔True
A food and beverage company wants to test if their new bottled vitamin supplement has an average
content of 5000 mg of vitamin C. To support their claim they have collected a random sample of 83
bottles and found the average content of these 83 bottles was 5147 mg of vitamin C. The population
standard deviation is known to be 488 mg. The company would like to test their hypothesis using a
significance level of 0.05. Calculate the appropriate p-value to test this hypothesis. - correct answer
✔✔.0062
A p-value of 0.09 cannot reject a null hypothesis at a significance level of 10%. - correct answer ✔✔False
In 2010, the US Census has found that 25% of American households had a person 65 years or older living
in them. The government would like to test if this proportion has increased since then. To achieve that, a
random sample of 265 American household has been chosen, among which 74 households had a person
65 years or older living in them. Calculate the p-value needed to test this hypothesis at a 0.1 level of
significance. - correct answer ✔✔.1379
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