{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

UnitQuiz7

# UnitQuiz7 - 1 Is the given percent a statistic or a...

This preview shows pages 1–3. Sign up to view the full content.

1. Is the given percent a statistic or a parameter? Of 10 students sampled from a class of 200, 8 (80%) said they would like the school library to have longer hours. A. Parameter B. Statistic Since the percent is from a sample it is a statistic. Points Earned: 1/1 Correct Answer: B Your Response: B 2. Is the given percent a statistic or a parameter? A customs inspector sampled 5 boxes among 20 boxes being shipped from out of the country. He found that one of the five boxes (20%) contained an illegal food item. A. Statistic B. Parameter Since the percent is from a sample it is a statistic. Points Earned: 1/1 Correct Answer: A Your Response: A 3. For the following study, decide if the two samples are independent or paired samples: A group of 50 students each measured the length of their right arm and the length of their left arm. The average right arm lengths were compared to the average left arm lengths. A. Independent samples

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
B. Paired samples Since the arm length differences were from the same individual (e.g. your left arm measure minus your right arm measure) the study used paired samples Points Earned: 1/1 Correct Answer: B Your Response: B 4. For the following study, decide if the two samples are independent or paired samples: A group of 50 students had their blood pressures measured before and after watching a movie containing violence. The mean blood pressure before the movie was compared with the mean pressure after the movie. A. Paired samples B. Independent samples The readings are done on the same individual; once before the movie and again after. Therefore taking two readings on the same sample would imply paired samples Points Earned: 1/1 Correct Answer: A Your Response: A 5. Which statement is true about ρ and ρ-hat? A. They are both parameters. B. They are both statistics. C. ρ is a parameter and ρ- hat is a statistic.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}