Question

For each question mark TRUE or FALSE, and write a justification for your answer. Remember that a parameter applies to a population whereas a statistics applies to a sample. 1. In a study of all 2857 employees at a college, it is found that 45% own a vehicle. TRUE OR FALSE: The number 45% is a parameter. 2. In a survey, one hundred college students are asked how many hours per week they spend on the Internet. TRUE OR FALSE: The parameter of interest is a proportion. 3. In a survey, smart phone users are asked how many times they used a web-based taxi service over the last year. TRUE OR FALSE: The parameter of interest is a proportion. 4. In a survey, one hundred college students are asked whether or not they cited information from Wikipedia in their papers. TRUE OR FALSE: The parameter of interest is a proportion. 5. Suppose you want to estimate the percentage of videos on YouTube that are cat videos. It is impossible for you to watch all videos on YouTube so you use a random video picker to select 1000 videos for you. You find that 2% of these videos are cat videos. TRUE OR FALSE: A video in your sample is a sample statistic. 6. Suppose you want to estimate the percentage of videos on YouTube that are cat videos. It is impossible for you to watch all videos on YouTube so you use a random video picker to select 1000 videos for you. You find that 2% of these videos are cat videos. TRUE OR FALSE: 2% is a sample proportion.

Answer 1

Date Page Write. True or false to In a shidy of all 2857 eneplogee at a college, 45% own a vehicle. True Here all employee in a college repre- sent the population under study Proportion of employee _ 45 -0.45 own'a vehicle lon =). The number 45% is a population a parametes In a survey one hundred college student are asked how many hours they spend on internet Here the parameter of Interest is mean number of hours FALSE - The is mean parameter of Interest not proportion

FALSE Here is they over the parameter of Interest Average number of times. used a web based taxi the last year So Parameter of Interest is not proportion In a survey parameter q Interest is how many students used Wikipedia Information in their papers TEST True; So the parameter of Interest is to find proportion of p. students using wikipedia in their papers 5. FALSET A video in the sample IS sample characteristic le whether it is cat of some other

Soot is not sample statistic. G TROE on a of sample of 1000 video 2% videos are cat videos. = 20% is a sample proportion