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Homework answers / question archive / 1) Kim Kardashian is interested in studying the phenomenon of selfies more deeply

1) Kim Kardashian is interested in studying the phenomenon of selfies more deeply

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1) Kim Kardashian is interested in studying the phenomenon of selfies more deeply.  She randomly selects 20 of her Instagram followers' feeds.  For each selected feed, she records the number of selfies posted in the past year and the number of people in the foreground of the picture.  What is the sample of this study?

 

2. Horace Horsecollar is interested in the opinion of vacationers at Disney World.  He creates a short survey and administers it to every 1000th person to enter the park, starting with the 364th person.  What method did Horace use to select his sample?

 

3. Leonardo da Vinci is interested in studying the wing length of carrier pigeons in Milan.  To do so, he obtained a list of every carrier pigeon in the city,  and selected 74 pigeons at random from that list.  What method did Leonardo use to select his sample?

 

4. What is the standard deviation of the following: 44, 19, 42, 35, 15, 50

Round to 2 decimal places as needed.

 

5. What is the standard deviation of the following: 35, 24, 48, 10, 13, 34

Round to 2 decimal places as needed.

 

6. Demarion Santana is interested in studying the growth rates of capsicum annuum (pepper) plants under bridges in California.  He randomly selects 50 bridges in California and records the frequency, height, and number of peppers on any plants growing under these bridges.  His results were published in the Almanac of Questionable Statistics, Vol 1 (2016).  What is the population in this study?

 

7. Belinda Hatfield is interested in the occurrence of notches in the ears of wild hogs in the Big Sandy River area of West Virginia.  Over the span of 6 weeks, Belinda traps 23 wild hogs and records the number and shape of notches in the ears of wild hogs.  What is the population of this study?

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