The following are two sets of class scores (you may consider these scores to be normally distributed). julia received the two scores marked with an asterisk. did she do better or worse on the second test? why? (16 points) first test 48 *56 61 60 39 49 5 57 52 51 second test 75 81 63 *74 59 88 77 79 76 69 67

First let’s find the mean and standard deviation for both test and then we can calculate the probability of getting that score in his respective test and compare. 

First test

P(x < 56)

P(z < 56-47.80/16.38)

P(z<0.50) = 1 – 0.3085 = 0.6915 or 69 percentile

Second test

P(x < 74)

P(z < 74 – 73.45 / 8.37)

P(z<0.07) = 1 – 0.4721= 0.5279 or 53 percentile

The probability for this normal distribution also means the percentile, so we can say that in the first test she was in the 69 percentile while in the second test she was in the 53 percentile. Therefore, she did worse in the second test

alright well the answers to your question is

2xy/9 hope this have a nice day : )

step-by-step explanation: