The normal distribution is
symmetric about its mean
The area under a standard normal curve is
d. 1
In a normal distribution, the highest value of the density function occurs at
Select one:
a. mean
b. all points, since it is the same value everywhere
c. variance
For a standard normal distribution, the value of the median is
Select one:
a. 2
b. cannot be determined
c. 1
d. 0
For a normal distribution with mean μ and variance σ2, the probability of being smaller than μ - 1.5σ is
Select one:
a. 0.0122
b. 0.9878
c. 0.0668
d. 0.9332
A student found that it takes 40 minutes on average to complete a specific programming exercise.
Given that the standard deviation for this task is 5 minutes and the times for completing this exercise
are normally distributed, what is the probability that on any given day it will take 50 minutes or more to
complete the exercise?
Select one:
a. 0.4772
b. 0.0228
c. 0.7228
d. 0.5000
In any continuous probability distribution, what is the probability that an outcome equals the mean μ?
Select one:
a. μ
b. 1
c. 0
d. 0.5
If a normal distribution has a mean of 18.0 and a standard deviation of 1.2, what value is at the 80th
percentile?
Select one:
a. 18.6
b. 19.0
c. 19.4
d. 17.0
We map an observed variable x by a logarithmic transformation into a derived variable y=log(x) and
notice that y is has an approximate normal distribution.
What does this imply for the original variable x:
Select one:
a. mean < median
b. mean = median
c. mean > median
In experiments with human subjects, a discrete 7-point Likert scale is frequently used (for instance
coded by integer responses in the range [-3:+3]. We conducted 9 experiments (called H1 through H9)
with 100 subjects which resulted in the following data ( here (m:n) means that the value m occurs n
times):
H3
In experiments with human subjects, a discrete 7-point Likert scale is frequently used (for instance
coded by integer responses in the range [-3:+3]. We conducted 9 experiments (called H1 through H9)
with 100 subjects which resulted in the following data ( here (m:n) means that the value m occurs n
times):
H7
In experiments with human subjects, a discrete 7-point Likert scale is frequently used (for instance
coded by integer responses in the range [-3:+3]. We conducted 9 experiments (called H1 through H9)
with 100 subjects which resulted in the following data ( here (m:n) means that the value m occurs n
times):
H5
In experiments with human subjects, a discrete 7-point Likert scale is frequently used (for instance
coded by integer responses in the range [-3:+3]. We conducted 9 experiments (called H1 through H9)
with 100 subjects which resulted in the following data ( here (m:n) means that the value m occurs n
times):
H4
Consider an input signal of length 9 equal to [110123223][110123223] on which we perform a
median filter.
Which of the following signals is the output of the median filtering of length 5:
Select one:
a. [..11222..][..11222..]
b. [..11232..][..11232..]
c. [..11122..]