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Percentiles
Page 2
Questions (162)
One hundred students took a statistics exam where the mean score was 78. The distribution was normal. The standard deviation was
2 answers
asked by
ShaQuana Mitchell
534 views
Find the values of the 30th and 90th percentiles of the data. Please show your work.
129, 113, 200, 100, 105, 132, 100, 176, 146,
2 answers
asked by
Ciaria
1,122 views
Find the values of the 30th and 90th percentiles of the data. Please show your work.
129, 113, 200, 100, 105, 132, 100, 176, 146,
2 answers
asked by
Ciaria
804 views
The Precision Scientific Instrument Company manufactures thermometers that are supposed to give readings of 0°C at
the freezing
3 answers
asked by
Brenda
1,715 views
The annual per capita consumption of fresh apples (in pounds) in a nearby state can be approximated by a normal distribution,
1 answer
asked by
TJ
628 views
Problem 2
Here is another distribution you have seen before; it is the distribution of scores discussed in Lecture 2.1. 4|8 5|9
2 answers
asked by
A
644 views
Twelve college students were surveyed about the distance from their house to
the college they attended. 12 18 54 13 15 24 8 5 14
1 answer
asked by
anoneemose
387 views
Twelve college students were surveyed about the distance from their house to
the college they attended. 12 18 54 13 15 24 8 5 14
4 answers
asked by
anoneemose
390 views
A set of LSAT scores follows the normal curve. The average is 560, and the standard deviation is 60. Find the 80th percentile.
1 answer
asked by
sheri
369 views
Assume that 150 scores are normally distributed with a mean of 92 and a standards deviation of 11.5
What is the 50th percentile
1 answer
asked by
Betty
375 views
Suppose we have a population of scores with a mean (μ) of 200 and a standard deviation (σ) of 10. Assume that the distribution
1 answer
asked by
lori
492 views
Rank the following data in increasing order and find the position and value of the 56th percentile. Please show all of your
9 answers
asked by
Jennifer
387 views
Rank the following data in increasing order and find the position and value of the 56th percentile. Please show all of your
4 answers
asked by
Jennifer
936 views
If your score on a statistics exam was 76 and the professor gave you the distribution for the exam score for your class, you
2 answers
asked by
Jojo
564 views
Find the 96th percentile of MPULS?
1 answer
asked by
sam
311 views
if a student's rank in a class of 400 students is 44 find the student's percentile rank.
1 answer
asked by
john peters
426 views
Scores on the verbal section of the SAT have a mean of 500 and a standard deviation of 100. If someone scored at the 90th
4 answers
asked by
Johnny
1,806 views
the percentile rank of t5 = 1.476
1 answer
asked by
vee
280 views
rank the following in increasing order and find the position and value of the 11th percentile show all work. 7 5 3 2 9 6 4 3 8 5
1 answer
asked by
janet
318 views
Calculate the 42nd percentile in a frequency table. the frequency 1,3, 4, 2, 2, 1, 1, 2, 1, 3.
1 answer
asked by
Mary
354 views
Suppose x is normally distributed with a mean of 130 and a standard deviation of 25. Twenty-six percent of the values are less
3 answers
asked by
thara
594 views
What is the interdecile range of the following:
X Percentile 107 10th 114 25th 118 50th 122 75th 129 90th
1 answer
asked by
KLM
442 views
The average travel time to work for a person living and working in Kokomo, Indiana is 17 minutes. Suppose the standard
4 answers
asked by
Promise
2,495 views
Assume that math SAT scores are normally distributed with a mean of 500 and a standard deviation of 100. A score of 560
4 answers
asked by
Deb
2,011 views
Exam scores were normal in MIS 200. Jason's exam score was 1.41 standard deviations above the mean. what percentile is he in?
4 answers
asked by
Nathan
1,793 views
At one college, GPA’s are normally distributed with a mean of 2.9 and a standard deviation of 0.6. Find the 70th percentile.
3 answers
asked by
justice
1,541 views
The following frequency distribution presents a set of exam scores for a class of N= 20 students.
X F CF % C% 90-99 4 20 20 100
2 answers
asked by
Lezlie
1,268 views
At a local manufacturing plant, employees must complete new machine set ups within 30 minutes. New machine set-up times can be
2 answers
asked by
Anonymous
1,217 views
The weight of a small Starbucks coffee is a random variable with a mean of 360 g and a standard
deviation of 9 g. Use Excel to
2 answers
asked by
maribel
1,214 views
Of 25 test scores, there are 15 scores less than or equal to 85. What is the percentile rank of a test score of 85?
56% 60% 40%
1 answer
asked by
sara
29 views
Scores on a recent national statistics exam were normally distributed with a mean of 80 and a standard deviation of 6.
What is
3 answers
asked by
Anonymous
1,125 views
Find 10-th, 60-th and 75-th percentiles in each of your data set, then write down each value that corresponds to those
1 answer
asked by
metu
1,116 views
Below are 36 sorted ages of an acting award winner. Find P10 converting a percentile to a data value
17 21 22 22 22 23 24 30 31
3 answers
asked by
slomo
1,079 views
The time that it takes a randomly selected job applicant to perform a certain task has a distribution that can be approximated
3 answers
asked by
chels
1,096 views
Angela scored in the 90th percentile of her class math test. If 27 students scored the same as or lower than she did, how many
3 answers
asked by
Katie
1,047 views
A density curve like an inverted letter "V" The first segment goes from the point (0, .6) to the point (0.5, 1.4). The second
2 answers
asked by
Statistics
937 views
What is the 75th percentile of the adhesion distribution?
A locomotive's 'adhesion' is the locomotive's pulling force as a
1 answer
asked by
Anonymous
873 views
What z-value corresponds to the 18th percentile?
2 answers
asked by
Lori
875 views
How do I find a percentile if I only have the mean and sd? ie...what IQ score is associated with the 65th percentile?-mean is
2 answers
asked by
joey
835 views
Find the values of the 30th and 90th percentiles of the data.
129, 113, 200, 100, 105, 132, 100, 176, 146, 152 i found 30th to be
3 answers
asked by
jess
832 views
IF SAT scores have approximately a normal distribution with the mean being 550 and standard deviation of 90. How can I calculate
3 answers
asked by
Kerry
803 views
Let X be a continuous random variable that is normally distributed with mean, µ = 15 and standard deviation, σ = 2.8, find a
2 answers
asked by
Jessie
785 views
rank the following in increasing order and find the position and value of the 91st percentile show all work.
4,,5,4,9,9,1,0,7,4,8
1 answer
asked by
mary
759 views
Let's say that your average monthly charge is normally distributed with a mean of $500 and a standard deviation of $100. The
2 answers
asked by
Stacy
701 views
Assume that body temperatures of healthy adults are normally distributed with a mean of 98.2°F and a standard deviation of
2 answers
asked by
ali awan
710 views
Scores on a mathematics examination appear to follow a normal distribution with mean of 65 and standard deviation of 15. The
1 answer
asked by
Jimmy Smith
697 views
The following data set is the GPAs of the students in a statistics class.
1.93, 1.99, 2.00, 2.04, 2.12, 2.34, 2.55, 2.55, 2.75,
2 answers
asked by
angela
653 views
One hundred students took a statistics exam where the mean score was 78. The distribution was normal. The standard deviation was
2 answers
asked by
ShaQuana Mitchell
610 views
You are one of the finalists at a science fair. The scores of the other finalists are 87, 89, 81, 85, 87, 83, 86, 94, 90, 97,
1 answer
asked by
Anonymous
615 views
Consider a sample with data values of 27, 25, 20, 15, 30, 34, 28, and 25. Compute the 21st, 26th, 61st, and 71st percentiles. If
1 answer
asked by
Anonymous
602 views
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Parent Categories (15)
Data Analysis
Data Analysis and Probability
Data Analysis and Statistics
Descriptive Statistics
Frequency distribution
Inequalities
Mathematics
Measures of Central Tendency
Measures of Central Tendency and Dispersion
Normal Distribution
Probability
Standardized Test Statistics
Statistics
Test Scores
Testing/Grading