WorksheetsREVIEW QUIZ
Total questions: 25
Worksheet time: 43mins
Which refers to numerical outcomes of a random experiment, usually represented by X or Y and can either be discrete or continous?
Random Experiment
Continous Variable
Discrete Variable
Random Variable
Complete the statement, respectively.
"A variable whose value can be obtained by counting is _____ while the variable obtained by measuring is _____."
discrete, continous
continous, discrete
countable, measurable
measurable, countable
The number of activities in the student's Portfolio is an example of CONTINOUS VARIABLE. Is it True or False? Why?
Which of the following are considered properties of a random variable?
The sum of the probabilities of a random variable is equal to 1.
A random variable can be discrete or continuous.
A random variable can be negative.
A random variable represents numerical outcomes for different situations or events.
If you tossed three coins at once, then there will be (a) total outcomes.
The word SAMPLE SPACE refers to ___.
all experiment
all outcomes
all trials
all probability
What are the process included in calculating the mean of the discrete random variable X?
Get the square root of the product.
Get the summation of the product.
Multiply each x value by its probability.
Identify the correct probabilities for each x value.
Do you agree on the statement,
"If the variance or standard deviation is high/large, then its values of random variable is far from the mean."?
YES
NO
What parameter is also equal to the square root of variance?
(a)
Z-Score is also called as _____.
standard normal probability
standard normal distribution
standard normal score
standard normal curve
What will you do to find the area between the two z-values if one is positive and the other one is negative?
Calculate the mean and standard deviation
Rewrite the value obtained from z-table
Add the two obtained values from the z-table
Subtract the obtained value from the z-table to 1
Which random sampling method refers to groupings according to gender/age and getting samples from each of the formed groups?
SIMPLE
SYSTEMATIC
STRATIFIED
CLUSTER
The two types of non-random sampling methods are ___ and ___.
(a)
What are the steps in creating sampling distribution of the sample mean?
Determine the number of sets of all possible random samples.
List all the possible random samples and solve for the sample mean of each set of samples.
Construct a frequency distribution table of the sample mean and probability.
Compute for the standard deviation and variance of the samples.
The SAMPLING DISTRIBUTION OF THE SAMPLE MEAN is always equal to the ___ of the population.
MEAN
VARIANCE
STANDARD DEVIATION
PROBABILITY
Is the population variance KNOWN or UNKNOWN?
"The population of selected students from class A to class D are 3, 5, 7, 8 and 9 will perform an interpretative dance for the program and suppose that the drawn sample size is 5 from this population."
KNOWN
UNKNOWN
What distribution will you use if the population variance is unknown and the sample size is small?
sampling distribution
probability distribution
z-distribution
t-distribution
If the area of the shaded part is 0.12, then what is the area of the unshaded part of the given t-distribution?
If P(X) = 10x what are the possible values of X for it be considered as a probability distribution?
0, 1, 2, 3
0, 1, 2, 3
1, 2, 3, 4
1, 1, 3, 4
How will you describe this graph?
The shaded region of the normal curve is above the z= 1
The shaded region of the normal curve is between z= 0 and z= 1
The shaded region of the normal curve is between z= -1 and z= 1
The shaded region of the normal curve is below the z= 1
Draw the correct illustration for the curve of P(-1 < Z < 1).
The weight of Grade 11 students in JDLHS were measured and found to be normally distributed with a mean of 58 and standard deviation of 6. If a student from the school is chosen at random, what is the probability that his weight is higher than 70?
Draw and label the area or region to the left of z= -1.78 (0.4625)
Draw and label the area or region above of z= -1.0 (0.3413)
Draw and label the area or region between of z= -1.78 (0.4625) and z= -1.0 (0.3413)
