Use the following to answer Questions 17-21 Please show work! A researcher wante
ID: 3156032 • Letter: U
Question
Use the following to answer Questions 17-21
Please show work!
A researcher wanted to know: Do people eat more regular potato chips than they do fat-free potato chips if they do not know what type of chip they are eating?
During a given 2-week period, the participants received the same type of chip (regular or fat-free) each day. After the first 2 week period, there was a 1 week period in which the participants received the alternate type of potato chip (regular or fat-free) each day under the same protocol. The order in which the chips were presented was determined by random assignment. Neither the subject, nor the people monitoring how many chips were eaten, knew which type of chips the subject was eating. The subjects were aware that they might be eating non-standard potato chips as part of the study. The subjects were also tested, prior to eating the potato chips, to make sure they were not allergic to any ingredients.
17. True or False: [4] This study is not ethical because the subjects did not know what type of potato chip they were eating.
18. Is this an observation or an experiment? Why?
19. The type of statistical test that should be done is (check the correct answer)
___ A one sample t-test because you only did one experiment.
___ A matched pairs t-test because each person ate both types of
potato chips.
___ A two sample t test because there were two types of potato
chips.
___ ANOVA because there were many people eating the potato
chips.
___ Chi squared because the type of potato chips is categorical.
20. Write the correct statistical conclusion and the correct real-life interpretation of that statistical conclusion if the p value is 0.002
21.EXPLAIN why this was or was not a double-blind, controlled experiment.
A researcher wanted to know: Do people eat more regular potato chips than they do fat-free potato chips if they do not know what type of chip they are eating?
During a given 2-week period, the participants received the same type of chip (regular or fat-free) each day. After the first 2 week period, there was a 1 week period in which the participants received the alternate type of potato chip (regular or fat-free) each day under the same protocol. The order in which the chips were presented was determined by random assignment. Neither the subject, nor the people monitoring how many chips were eaten, knew which type of chips the subject was eating. The subjects were aware that they might be eating non-standard potato chips as part of the study. The subjects were also tested, prior to eating the potato chips, to make sure they were not allergic to any ingredients.
17. True or False: [4] This study is not ethical because the subjects did not know what type of potato chip they were eating.
18. Is this an observation or an experiment? Why?
19. The type of statistical test that should be done is (check the correct answer)
___ A one sample t-test because you only did one experiment.
___ A matched pairs t-test because each person ate both types of
potato chips.
___ A two sample t test because there were two types of potato
chips.
___ ANOVA because there were many people eating the potato
chips.
___ Chi squared because the type of potato chips is categorical.
20. Write the correct statistical conclusion and the correct real-life interpretation of that statistical conclusion if the p value is 0.002
21.EXPLAIN why this was or was not a double-blind, controlled experiment.
Explanation / Answer
17) False, the subjects knew that they might require to eat non-standard potato chips as part of study and were also tested if allergic to it
18) The study is an experiment, as the order in which chips were assigned were determined randomly.
19) Chi-square, because type of potato chips (regular versus fat free) are categorical and count of potato chips eaten are recorded in each categories.
20) Reject null hypothesis, for p value less than alpha-0.05 to conclude that consumption of potato chip sare associated with the type of potato chips.
21) this is double blind and controlled. Neither subject snor people monitoring knew how many potato chips the subjects are eating and control group received the alternate typ eof potato chips in second pahse as compared to first phase.
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