Choose a correct answer for each of the following questions and solve 15. A rand
ID: 3058140 • Letter: C
Question
Choose a correct answer for each of the following questions and solve
15. A random sample of refreshment bottles indicates that the bottles have an average of 20.3 ounces of soda with a 1.22 oz. variance.
a) find the confidence intervals (90%, 95%, and 99%) for the average content in ounces of all the bottles under the production of this machine.
b) How many additional bottles should be included in the sample to reduce the margin of error by half?
16. Null hypotheses are used in statistics because:
a) the use of other types of hypotheses shows that the investigator is partial
B) are more easily understood than other types of hypothesis
C) are required by the logic of the tests of statistical significance
D) Simplify calculations
17. If p < 0.05 the Investigator:
a) accepts the null hypothesis always
B) rejects the null hypothesis always
C) rejects the null hypothesis in some occasions
D) accepts the null hypothesis in some occasions
Explanation / Answer
Choose a correct answer for each of the following questions and solve
15. A random sample of refreshment bottles indicates that the bottles have an average of 20.3 ounces of soda with a 1.22 oz. variance.
a) find the confidence intervals (90%, 95%, and 99%) for the average content in ounces of all the bottles under the production of this machine.
b) How many additional bottles should be included in the sample to reduce the margin of error by half?
16. Null hypotheses are used in statistics because:
a) the use of other types of hypotheses shows that the investigator is partial
B) are more easily understood than other types of hypothesis
C) are required by the logic of the tests of statistical significance
D) Simplify calculations
17. If p < 0.05 the Investigator:
a) accepts the null hypothesis always
B) rejects the null hypothesis always
C) rejects the null hypothesis in some occasions
D) accepts the null hypothesis in some occasions