Multiple Choice: clearly circle your (one) cholee (f it is noft will be counted

Question

Multiple Choice: clearly circle your (one) cholee (f it is noft will be counted wrong) 1. Third Year students at Hogwarts took their second Potions theory exam. Needless to say, the exam was more difficult than Professor Snape intended (t was supposed to be hard, orm that even Hermione Granger and Draco Malfoy scored two levels Given below their normal scoren). stistics below (pretend their scores were converted to our scoring methods for exarna), calculate a 95% confiden third year students. 63.12. s-22.15 nnd n = 36 ce interval on the true average score on the second Potions theory exam for 12 ± (2.03) = 63.12 ± 7.49 55.63,70.61 (b) 63.12 ±(1.96) 2%-63.12±7.49-56.88, 69.36 (c) 63. 12 ±(1.645)2=63.12±7.49-56.9, 69.2 (d) 63.12 ±(2.03)2A. 63.12 ±7.49m 55.55,70.55 n rondom sample of 1101

Explanation / Answer

xbar = 63.12
s = 22.15
n = 36

= xbar +/- Z*s/sqrt(n)

= 63.12 +/- 1.96*22.15/sqrt(36)

=55.88 to 70.36

Now there is no choice representing this....all options are actually wrong.

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