MATH 155 Statistics-TEST #2-21 Questions-Th You may use your notes and calculato

Question

MATH 155 Statistics-TEST #2-21 Questions-Th You may use your notes and calculator. 1) The test scores of 40 students are listed below. Find Ps6 30 35 43 44 47 48 54 55 56 57 59 62 63 65 66 68 69 69 71 72 81 82 83 85 89 92 93 94 97 98 2) A student earned grades of 84, 78, 84, and 72 on her four regular tests. Sh exam and 86 on her class projects. Her combined homework grade was counts for 40% of the course grade, the final exam counts for 30%, the pr counts for 20%. What is her weighted mean grade? Round to one decima

Explanation / Answer

Question 1

Here we are asked P56

That means it is asking what is 56% percentile.so since we got 40 scores .

56% of it is = 40 * 0.56 = 22.4

round it up to the next whole number, it doesnt matter if you cant round it like in this case. so P56 is on the 23rd position. that is 74.

P56 = 74

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