A statistics student wants to compare his final exam score to his friend's finat exam score from
last year; however, the two exams were scored on different scales. Remembering what he learned
about the advantages of Z scores, he asks his friend for the mean and standard deviation of her
class on the exam, as well as her final exam score. Here is the information: Our student: Final
exam score = 85 ; Class; M = 70 ; S D = 10 . His friend: Final exam score = 45 ; Class: M = 35 ;
S D = 5 , 17) The Z score for the student and his friend are: 17) A) Our student, Z = 1.07 ; his
friend, Z = 1.50 . B) Our student, Z = 1.07 ; his friend, Z = 1.14 . C) Our student, Z = 1.50 ; his
friend, Z = 2.00 . D) Our student, Z = 1.07 ; his friend, Z = 1.14 . 18) The raw score that
corresponds to a Z score of 2.0 obtained from a distribution with a mean of 80 and a standard
deviation of 10 is A) 170. B) 100. C) 90 . D) 82. 19) Using the percentage approximations for the
normal curve, the percentage of scores between the mean and one standard deviation below the
mean is A) 34% B) 50% C) 50% D) 14% 20) Using a normal curve table, the percentage of
scores between a Z score of 1.29 and a Z score of 1.49 20) is A) 7.49 . B) .54 . C) 3.04 . D) 83.34
21) The fact that probabilities are proportions means that they 21) A) cannot be lower than zero
or more than 05 . B) have to be larger than one. C) cannot be lower than zero or more than one.
D) can be either a positive or a negative number..
A statistics student wants to compare his final exam score to his frie.pdf
1. A statistics student wants to compare his final exam score to his friend's finat exam score from
last year; however, the two exams were scored on different scales. Remembering what he learned
about the advantages of Z scores, he asks his friend for the mean and standard deviation of her
class on the exam, as well as her final exam score. Here is the information: Our student: Final
exam score = 85 ; Class; M = 70 ; S D = 10 . His friend: Final exam score = 45 ; Class: M = 35 ;
S D = 5 , 17) The Z score for the student and his friend are: 17) A) Our student, Z = 1.07 ; his
friend, Z = 1.50 . B) Our student, Z = 1.07 ; his friend, Z = 1.14 . C) Our student, Z = 1.50 ; his
friend, Z = 2.00 . D) Our student, Z = 1.07 ; his friend, Z = 1.14 . 18) The raw score that
corresponds to a Z score of 2.0 obtained from a distribution with a mean of 80 and a standard
deviation of 10 is A) 170. B) 100. C) 90 . D) 82. 19) Using the percentage approximations for the
normal curve, the percentage of scores between the mean and one standard deviation below the
mean is A) 34% B) 50% C) 50% D) 14% 20) Using a normal curve table, the percentage of
scores between a Z score of 1.29 and a Z score of 1.49 20) is A) 7.49 . B) .54 . C) 3.04 . D) 83.34
21) The fact that probabilities are proportions means that they 21) A) cannot be lower than zero
or more than 05 . B) have to be larger than one. C) cannot be lower than zero or more than one.
D) can be either a positive or a negative number.
