MAT 126 Week 5 Quiz
For more course tutorials visit www.uophelp.com Week 5 1. Question : Find the area under the normal distribution curve between z = 1.52 and z = 2.43. 2. Question : 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
For more course tutorials visit
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Week 5
1. Question : Find the area under the normal distribution curve between z = 1.52 and z = 2.43.
2. Question : 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
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<strong>MAT</strong> <strong>126</strong> <strong>Week</strong> 5 <strong>Quiz</strong><br />
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<strong>Week</strong> 5<br />
1. Question : Find the area under the normal distribution curve between z = 1.52 and<br />
z = 2.43.<br />
2. Question : For the 20 test scores shown, find the percentile rank for a score of 86.<br />
75 63 92 74 86 50 77 82 98 65 71 89 75 66 87 59 70 83 91 73<br />
3. Question : If a student's percentile rank in a class of 400 students is 87, find the<br />
student's class rank.<br />
4. Question : Find the value for the correlation coefficient r.<br />
5. Question : Find the median.<br />
2 27 38 55 49 9 53 34<br />
6. Question : 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<br />
7. Question : Which statement is true for a statistical study?<br />
8. Question : The average amount customers at a certain grocery store spend yearly<br />
is $636.55. Assume the variable is normally distributed. If the standard deviation is $89.46,<br />
find the probability that a randomly selected customer spends between $550.67 and $836.94.<br />
9. Question : Which of the following is not a property of a normal distribution?<br />
10. Question : The average hourly wage of employees of a certain company is $9.83.<br />
Assume the variable is normally distributed. If the standard deviation is $4.58, find the<br />
probability that a randomly selected employee earns less than $5.43.<br />
11. Question : Use a scatter plot to deternine the relationship between the x values<br />
and the y values.<br />
12. Question : If a student's rank in a class of 400 students is 44, find the student's<br />
percentile rank.<br />
13. Question : Fran's percentile rank on an exam in a class of 500 is 85. Kelly's class<br />
rank is 60. Who is ranked higher?<br />
14. Question : The area under a normal distribution curve that lies within one<br />
standard deviation of the mean is approximately ___.<br />
15. Question : Find the area under the normal distribution curve to the right of z = –<br />
1.03.
16. Question : Find the area under the normal distribution curve to the right of z = –<br />
3.24.<br />
17. Question : Armia's percentile rank on an exam in a class of 300 is 85. Sanjo's<br />
class rank is 42. Who is ranked higher?<br />
18. Question : Determine whether a correlation coefficient of r = –0.405 is significant<br />
at the 5% level for a sample size of 22.<br />
19. Question : Find the standard deviation.<br />
44 46 33 10 50 27<br />
20. Question : Find the median and the mean for the data set below.<br />
5.4 2.0 6.8 3.1 2.9 4.7 2.1 5.0 1.9 3.4
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