meanie!
emperor's new groove
variety
why dont you just me in the
middle
middle
in the middle of the night
100
What is the greek symbol for mean:
mu
100
On a standardized test, scores are normally distributed with mean = 100 and s = 10. What percentage of scores are greater than 130?
.15%
100
Consider the following data. -4,12,12,-13,-13,12,-13
Determine the mode of the given set of data:
12 and -13
100
Consider the following data.
13,11,5,2,9,14
Determine the median:
10
100
Calculate the range: 4, 0, 1, 0, 1, 1, 0
4
200
Consider the following data.
13,11,5,2,9,14
Determine the mean:
9
200
The lifespans of a certain brand of light bulbs are normally distributed with a mean of 800 hours and a standard deviation of 100 hours.
What percentage of bulbs last less than 600 hours?
2.5%
200
What is the formula for CV?
200
Consider the following data.
13,11,5,2,9,14
Determine the mode:
no mode
200
Consider a set of data in which the mean is 80.4 and the standard deviation is 3.5. Calculate the z-score given that x = 73.3. Round your answer to two decimal places.
-2.03
300
Consider the following data. -4,12,12,-13,-13,12,-13
Determine the mean of the given data.
-1
300
The heights of trees in a forest are bell-shaped with a mean of 30 feet and a standard deviation of 5 feet.
What percentage of trees are at least 25 feet tall but no more than 40 feet tall?
81.5%
300
Calculate the standard score of the given x value, x = 46.9, where μ = 43.6, σ = 4.7. Round your answer to two decimal places.
.70
300
Which dataset has the largest standard deviation?
A. 70, 72, 74, 76, 78
B. 50, 60, 70, 80, 90
C. 68, 69, 70, 71, 72
B
300
The mean grade for Test 2 in Marquetta's biology class is 76, and the standard deviation is 8 points. If the standard score for Marquetta's test is 1.25, what is her grade?
86
400
The number of texts sent per day by teenagers is approximately bell-shaped with a mean of 80 texts and a standard deviation of 10 texts.
What percentage of teenagers send between 70 and 110 texts, but NOT between 80 and 90 texts?
49.85
400
A clothing store wants to know which shirt size to stock the most. Sizes sold last week were:
S, M, M, L, M, XL, L, M, S, L
Which measure should they use and why?
Mode
They care about the most common category (size), not an average.
400
In a very large factory, employees must report to work at 8A.M. The arrival times are normally distributed with mean 7:52A.M. and standard deviation 4 minutes.
2.5%
400
Consider the following data. -4,12,12,-13,-13,12,-13
Determine the median of the given data.
-4
400
Calculate the standard score of the given X value, X = 56.1, where σ = 53.2 and μ = 49.8. Round your answer to two decimal places
.12
500
SAT math scores are normally distributed with a mean of 500 and a standard deviation of 100.
What percentage of students score above 400 but NOT between 500 and 600?
50%
500
The number of customers entering a store per hour is bell-shaped with a mean of 200 customers and a standard deviation of 20 customers.
What percentage of hours have more than 160 customers but fewer than 220 customers, excluding those between 180 and 200 customers?
47.5%
500
Calculate the variance and standard deviation: 4, 0, 1, 0, 1, 1, 0
variance 2 and sd 1.4 or sqrt 2
500
A teacher wants to report a “typical” test score. Most students scored between 70 and 85, but a handful of students scored very low due to not completing the test.
Which measure should the teacher use and why?
Median
The very low scores are outliers that drag the mean down. The median resists that effect.
500
Draw the capital greek symbol that was used in the mean formula. Also, what is the symbol in greek?
Sigma E