PART 1
Which of the following is an example of a continuous random variable?
A. The number of passengers in a public utility jeep going to Alabang.
B. The amount of rainfall in Las Pinas within a month.
C. The number of students enrolled in a senior high school year 2020-2021.
D. The number of red marbles in a jar
B. The amount of rainfall in Las Pinas within a month.
If you have a very small variance or standard deviation but not equal to zero, it states that
A. the data points are farther from the mean.
B. the data points are nearer to the mean.
C. the data points are equal to the mean.
D. the data points have no relationship with the mean
B. the data points are nearer to the mean.
What is the area that corresponds to z = -1.25 under the normal curve?
A. 0.3944 B. -0.3944 C. 0.3289 D. - 0.3289
No answer
Which method is most likely to produce a random sample of the members of your class?
A. Listing the first five students that comes to mind.
B. Choosing the five oldest students in the class,
C. Writing the name of each student on a separate piece of paper and then pull out these slips from a hat.
D. Selecting the first six students to arrive at class
C. Writing the name of each student on a separate piece of paper and then pull out these slips from a hat.
A random sample of size 25 is to be selected from a normal population having a mean of 81 and a variance of 9. What is the 95th percentile of the sampling distribution of the mean?
A. 80.01 B. 81.99 C. 82.13 D. 82.18
B. 81.99
Which of the following is NOT an example of a random variable?
A. Winning in a raffle draw C. Winning in a singing contest
B. Celebrating your birthday D. Rolling dies
B. Celebrating your birthday
'The following data shows the probability for the number of Casuy candy sold in a given day at South Station Pasalubong Center. How many dozen of Casuy candies should be expected to sold per day?
A. 12 B. 15 C. 17 D. 18
B. 15
What is the area between z = -2.0 and z = 2.0 under the normal curve?
A. 0.9322 B. 0.9544 C. 0.9677 D. 0.9733
B. 0.9544
It is calculated by dividing the sum of the observations by the total number of observations.
A. Mean C. Parameter
B. Variance D. Standard deviation
A. Mean
A random sample of size 16 is to be selected from a normal population having a mean of 100 and a variance of 9. What is the 90th percentile of the sampling distribution of the mean?
A. 97.44 B. 100.08 C. 100.32 D. 100.64
D. 100.64
Applying the Properties of a Discrete Probability Distribution, which of the following tables DOES SUGGEST a probability distribution for a random variable?
B
The total area under the normal curve is
A. -1 B. 0.5 C. 1 D. 0
C. 1
What is the z-score of an area of 0.9370 under the standard normal curve?
A. z = - 1.53 B. z =1.53 C. z = -2.53 D. z = 2.53
B. z =1.53
From the given set of data below, find the sample variance. 9, 13, 15, 18, 20
A. 18 B. 18.5 C. 19 D. 19.5
B. 18.5
Which of the following is property of the t-distribution?
A. It is symmetric
B. As the sample grows, it gradually approaches the normal distribution.
C. It's exact shape is characterized by the degrees of freedom
D. All of the above are properties of the t-distribution
D. All of the above are properties of the t-distribution
In rolling a die, what is the probability of getting even number?
A. 1/2 B. 1/3 C. 1/4 D. 1/5
A. 1/2
What can you say about the mean and standard deviation of the given figure below?
A. The Mean are Equal, but the standard deviations are not equal.
B. The mean are not equal but the standard deviations are equal.
C. Both the mean and the standard deviations are not equal.
D. Both mean and standard deviations are equal.
A. The Mean are Equal, but the standard deviations are not equal.
The scores of the students in the final examination are normally distributed with a mean of 72 and a standard deviation of 8. What score do you find the upper 10% of the students' scores?
A. 80 B. 82 C. 84 D. 86
B. 82
Which theorem states that "lf random samples of size n are drawn from a population, then as n becomes larger, the sampling distribution of . mean approaches the normal distribution, regardless of the shape of the population distribution"?
A. Discrete Limit Theorem C. Central Limit Theorem
B. Phytagorean Theorem D. Variance Limit theorem
C. Central Limit Theorem
What is the other term used for confidence interval?
A. Alpha C. Interval estimate
B. Margin of error D. Degree of confidence
A. Alpha
Refer to the table below:
What is the sum of the probability of the given probability distribution
A. 1 B. 0 C. -1 D. 0.375
A. 1
Because of Covid-19 pandemic, the IATF are limiting the number of customers in a restaurant under the MECQ areas. Only 20% of their available chairs the costumers are allowed to enter in their establishment. Mr. Kurt computes the probabilities for the number of costumers going-in each day in his restaurant. The discrete probability distribution is shown below.
What would be the best interpretation of the mean number of costumers going-in each day in his restaurant?
A. During MECQ, most of the day there are 3 costumers going-in in his restaurant.
B. During MECQ, in 100 days, exactly 432 costumers are going-in in his restaurant.
C. During MECQ, if we look at the large number of days, then each day, approximately about 4 persons going-in in his restaurant.
D. None of these
C. During MECQ, if we look at the large number of days, then each day, approximately about 4 persons going-in in his restaurant.
_________ is the measurement or quantity that describes the population.
A. Means B. Parameter C. Sample D. Statistics
B. Parameter
The sample distribution of the mean is a distribution of
A. Individual population values C. Sample statistic
B. Individual sample values D. Population parameter
D. Population parameter
How will you compute for q hat if p hat is given?
A. 1 + p hat B. 1 / p hat c. 1*p hat D. 1 -p hat
D. 1 -p hat