Multiple Choice Questions (2 points/question, total of 30 points) Swhowit your a

Question

Multiple Choice Questions (2 points/question, total of 30 points) Swhowit your anewers for the multiple choice questions in the table fond on dhe front page Bew ae the descriptive statistics for a study which investigates if the avenage body semperature of healthy adults is 98.6 degrees Fahrenheit. The dota was assigned to the variable z in R. sunary) Yis, 1ss Qu Kedian Mean 3rd Qu. Max. 91.50 98 27 98.67 98.55 98.85 99.71 Ouly one of th bollowing statements is true. Choose the true statement A) There ave so outliers ) The temperature 97.5 is an outlier C) The temperature 93.71 is an outlier. D) The temperstures 97.5 and 99.71 are outliers E) Iseufficient information to determine if there are outliers. 2 Swpyne that the weight of a frog is normally distributed with mean ?-1.872 g and standard deviation. 0.759 g. We would like to say that 975% of the frogs have a weight larger than c. what is the value 3) 0 9874 C) 1.3476 D) 3.7765 E) 0.7683 3. It iemtimated that 25% of adults in a community suffer fron vitamin A) 03 imey, 3% have asthma and 5% suffer from asthma and vitamin What is the probability that a randomly selected adult has vitamin defcieney but does not have asthma A)0200 B)0.245 C) 0.134 D) 0. 876 E)0.500

Explanation / Answer

1) Q1 = 98.27

Q3 = 98.85

Interquartile range ( IQR) = Q3 - Q1 = 98.85 - 98.27 = 0.58

Lower fence = Q1 - 1.5*(IQR) = 98.27 - 1.5*0.58 = 97.4

Upper fence = Q3 - 1.5*(IQR) = 97.98

So the interval is ( 97.4 , 97.98) If any value does not belongs to this interval we say it is outlier.

So correct option is C) The temperature 98.71 is an outlier.

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