Porcupines can cause damage to wood structures by chewing them. Researchers studied a liquid repellent designed to reduce such damage. A sample of 20 wooden blocks of the same size were treated with the repellent and left outside in an area where porcupines are known to live. After a certain amount of time, the blocks were inspected for the number of porcupine teeth marks visible. The data were used to create the 95 percent confidence interval (4.9,5.8). . Which of the following claims is supported by the interval? (A) The expected number of porcupine teeth marks on a wooden block treated with the repellent is less than 5. (B) The expected number of porcupine teeth marks on a wooden block treated with the repellent is 5. (C) The mean number of porcupine teeth marks on all wooden blocks treated with the repellent is 6. (D) The mean number of porcupine teeth marks on all wooden blocks treated with the repellent is greater than 6. (E) The mean number of porcupine teeth marks on all wooden blocks treated with the repellent is less than 6.
Porcupines can cause damage to wood structures by chewing them. Researchers studied a liquid repellent designed
to reduce such damage. A sample of 20 wooden blocks of the same size were treated with the repellent and left
outside in an area where porcupines are known to live. After a certain amount of time, the blocks were inspected for
the number of porcupine teeth marks visible. The data were used to create the 95 percent confidence interval (4.9,5.8).
.
Which of the following claims is supported by the interval?
(A) The expected number of porcupine teeth marks on a wooden block treated with the repellent is less than
5.
(B) The expected number of porcupine teeth marks on a wooden block treated with the repellent is 5.
(C) The mean number of porcupine teeth marks on all wooden blocks treated with the repellent is 6.
(D) The mean number of porcupine teeth marks on all wooden blocks treated with the repellent is greater
than 6.
(E) The mean number of porcupine teeth marks on all wooden blocks treated with the repellent is less than
6.
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