Statistics- CH 5 & 6 Quiz

which position in a distribution corresponds to a z score of z= -1.00

below the mean by 1 standard deviation

which z score corresponds to a score that is above the mean by 2 standard deviations

+2

for the population with u=84 and o=4 what is the z score corresponding to x=80

-1.00

for any distribution what is the z score corresponding to the mean

0

for a population with a standard deviation of a o=5, what is the z score corresponding to a score that is 9 points above the mean

z= +1.80

for a population with u=40 and o=8, what is the z score corresponding to x=34

z= -0.75

Which z-score value represents the location farthest from the mean?

z= -2.00

on an exam with u=52 a person has a score of x=44 which value for the standard deviation would give this person the highest position in the class distribution

0=8

in n=25 games last season, the college basketball team averaged u=83 points with a standard deviation of o=8 in their final game of the season, the team scored 78 points based on this information the number of points scored in the final game was

a little below average

consider a population that has a score of x=15 associated with a z score of +1.50 what does this z score indicate about the location of x=15

a score of x=15 is 1.5 standard deviations above the mean

a researcher is interested in whether a new reaching technique influences the reading ability of elementary school children. the researcher knows the average reading ability among a population of third grader is u=3 with a standard deviation of o=1. if the researcher administers the new reading technique to a third grader who subsequently scores x=4, it can be concluded that the new reading technique

does not have an influence on reading ability

last week tim obtained a score of x=54 on a math exam with u=60 and o=8 he also scored x=49 on an English exam with u=55 and o=33, and he scored x=31 on a psychology exam with u=37 and o=4. for which class should tim expect the worst grade relative to his peers

english

a sample with m=85 and s=12 is transformed into z scores. after the transformation what are the values for the mean and standard deviation for the sample of z scores

m=0 and s=1

For a sample of n=20 scores, x=25 corresponds to z= -1.20 and x=40 corresponds to z=+1.80 what are the values for the sample mean and standard deviation?

m=31 and s=5

Last week Sarah had exams in math and in Spanish. On the math exam, the mean was u = 30 with o = 5, and Sarah had a score of X = 45. On the Spanish exam, the mean was m = 60 with s = 8, and Sarah had a score of X = 68. For which class should Sara expect a better grade?

math

tom scores an x=43 on an exam with a mean of u=52 tom scores is associated with a z score of -1.80 what is the value for the exam standard deviation

o=5

tom scores an x=43 on an exam with a mean of u=52. tom score is associated with a z score of -1.80 what is the value for thee exam standard deviation

o=5

tom scores an x=43 on an exam with a mean of u=52. toms score is associated with a z score of -1.80 what is the value for the exam standard deviation

o=5

a researcher may decide to transform original scores into a distribution with a pre determined mean and standard deviation other than the z score distribution because the z score distribution

often contains decimal and negative values

a researcher may decide to transform original scores into a distribution with a pre-determined mean and standard deviation other than the z score distribution because the z score distribution

often contains decimals and negative values

tranforming a set of scores into a standardized distribution of z scores consists of graphically _____ the scores

relabeling

for a sample a score that is 12 points above the meas has a z score of z=1.20 what is the sample standard deviation

s=10

last week sarah had exams in her math and spanish classes. on the math exam, the mean was u=40 with o=5 and sarah had a score on x=45. on the spanish exam the mean was u=60 with o=8 and sarah had a score of x=68 for which class should sarah expect the better grade relative to her peers in each class.

the grades should be the same because the two exam scores are in the same location

which statement below is not true regarding standardized distributions

the values for the mean and standard deviation for a standardized distribution match those values obtained in the original distribution

for any distribution what is the z score corresponding to the median

this is impossible to determine based on the information provided

If an entire population with μ = 60 and σ = 8 is transformed into z-scores, then the distribution of z-scores will have a mean of ___ and a standard deviation of ___.

u=0, o=1

in a population with o=5, a score of x=46 corresponds to a z score of z= +0.40 what is the population mean

u=41

a person x=65 on an exam which set of parameters would give this person the worst grade on the exam relative to others

u=70 and o=5

in a population of scores, x=83 corresponds to z= -0.50 and x=93 corresponds to z= +2.00 what are the values for the population mean and standard deviation

u=85 and o=4

under which circumstance is a score that is 15 points above the mean an extreme score relatively far from the mean

when the population standard deviation is much smaller than 15

under which circumstances is a score that is 15 points above the mean an extreme score relatively far from the mean

when the population standard deviation is much smaller than 15

for a sample with m=50 and s=12 what is the x value corresponding to z= -0.25

x=47

for a population with u=65 and o=4, what is the x value corresponding to z= -2.25

x=56

barbara scores x=120 on a social work licensure exam for the state of minnesota that has a mean of u=113 and a standard deviation of o=4. she moves to wisconsin and the state of wiscousin is trying to determine which score she should receive on their licensure exam that has a mean of u=100 and standard deviation of o=8. which score should barbara receive on the wiscousin licensure exam.

x=114

a distribution with u=55 and o=6 is being standardized so that the new mean and standard deviation will be u=50 and o=10. when the distribution is standardized which value will be obtained for a score of x=58 from the original distribution

x=55

for a population with u=65 and o=4 what is the x value corresponding to z= -2.25

x=74

for a population with u=100 and o=20 what is the x value corresponding to z= -0.25

x=95