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MAT 126 Week 5 Quiz

MAT 126 Week 5 Quiz

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MAT 126 Week 5 Quiz

If a student's rank in a class of 400 students is 44, find the student's percentile rank

To select a _________ sample, the population is divided into disjoint subgroups according to some characteristics like income level, and then a few individuals are selected randomly from each of the subgroups to be in the sample

Find the area under the normal distribution curve to the right of z = –3.24

Kate scored in the 95th percentile rank on an exam. If 400 students took the exam, how many students scored lower than Kate?

Find the median and the mean for the data set below.
5.4  2.0  6.8  3.1  2.9  4.7  2.1  5.0  1.9  3.4

For the 20 test scores shown, find the percentile rank for a score of 86.
75 63 92 74 86 50 77 82 98 65 71 89 75 66 87 59 70 83 91 73

Use a scatter plot to deternine the relationship between the x values and the y values

Fran's percentile rank on an exam in a class of 500 is 85. Kelly's class rank is 60. Who is ranked higher?

The average hourly wage of employees of a certain company is $9.83. Assume the variable is normally distributed. If the standard deviation is $4.58, find the probability that a randomly selected employee earns less than $5.43

Find the standard deviation.
44 46 33 10 50 27

Which statement is true for a statistical study?

A data set of size 19 has correlation coefficient of r = –0.432. Test the significance of r at the 5% level and at the 1% level.

The area under a normal distribution curve that lies within one standard deviation of the mean is approximately _____.

Find the area under the normal distribution curve between z = 1.52 and z = 2.43.

Find the area under the normal distribution curve between z = –1.34 and z = 2.95

Find the median.
2 27 38 55 49 9 53 34

Find the area under the normal distribution curve to the right of z = –1.03

Find Q1, Q2, and Q3 for the data set below.
5.4  2.0  6.8  3.1  2.9  4.7  2.1  5.0  1.9  3.4

Armia's percentile rank on an exam in a class of 300 is 85. Sanjo's class rank is 42. Who is ranked higher?

If a student's percentile rank in a class of 400 students is 87, find the student's class rank

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