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    Summative Exam

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    Andrilyn Bulanon
    This document appears to be a test or assignment covering topics in statistics. It contains multiple choice questions testing concepts like random variables, measurements, data collection, and branches of statistics. It also includes problems calculating summations, making a frequency distribution from grouped data to find the mean, median and mode, finding probabilities of coin tosses and dice rolls, and constructing a probability distribution and histogram for a random variable representing the number of apples drawn from a basket.

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    Summative Exam

    Uploaded by

    Andrilyn Bulanon
    71 views2 pages
    This document appears to be a test or assignment covering topics in statistics. It contains multiple choice questions testing concepts like random variables, measurements, data collection, and branches of statistics. It also includes problems calculating summations, making a frequency distribution from grouped data to find the mean, median and mode, finding probabilities of coin tosses and dice rolls, and constructing a probability distribution and histogram for a random variable representing the number of apples drawn from a basket.

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    This document appears to be a test or assignment covering topics in statistics. It contains multiple choice questions testing concepts like random variables, measurements, data collection, and branches of statistics. It also includes problems calculating summations, making a frequency distribution from grouped data to find the mean, median and mode, finding probabilities of coin tosses and dice rolls, and constructing a probability distribution and histogram for a random variable representing the number of apples drawn from a basket.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    71 views2 pages

    Summative Exam

    Uploaded by

    Andrilyn Bulanon
    This document appears to be a test or assignment covering topics in statistics. It contains multiple choice questions testing concepts like random variables, measurements, data collection, and branches of statistics. It also includes problems calculating summations, making a frequency distribution from grouped data to find the mean, median and mode, finding probabilities of coin tosses and dice rolls, and constructing a probability distribution and histogram for a random variable representing the number of apples drawn from a basket.

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    © All Rights Reserved
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    of 2

    Name:_____________________________________ Section:_______________________

    Part I. MULTIPLE CHOICE. Analyze deeply and answer correctly the following
    questions/problems. Write the letter that corresponds to your answer in your answer sheets.

    1. It is a numerical quantity that is assigned to the outcome of an experiment.


    a. Random variable b. Probability c. Discrete d. Continuous
    2. Which of the following is not an example of a sample?
    a. chairs in the classroom b. Bacteria c. lagundi plants d.MTCde Iriga
    3. Which of the following is not an example of a nominal measurement?
    a. Sex b. nationality c. odor d. year level
    4. It is the highest level of measurement.
    a. Nominal b. ratio c. interval d. ordinal
    5. It assumes values within a continuum, hence, may not be always be exact.
    a. Continuous b. Quantitative c. Discrete d. Qualitative
    6-7. two branches of Statistics: ______________ and ___________
    8. it is the process of gathering informations, numerical quantities or information.
    a. Data interpretation b. data Collection c.Data analysis d. Data Presentation
    9. It is important in decision making process. It increases reliability of research and it is useful in
    the study of human behavior.
    a. Census b. Statistics c. Variable d. Measurements
    10. Which of the following is an example of discrete random variable?
    a. voltage of radio batteries b. length of wire c. grade point average d. coins

    Part II. Using the given values, expand the following summations: Show your solutions.
    X1 = -2 X2 = -3
    Y1 = 1 Y2 = -4
    11-12. ∑2𝑖=1 −5𝑋𝑖 2
    15-17. ∑𝑖=1 −3𝑋𝑖 − 4𝑌𝑖
    2
    13-14. ∑𝑖=1 7𝑋𝑖

    Part III. 18-33. Using the data below, make a frequency distribution table for the grouped
    data: Then solve for its Mean, Median and Mode.

    Class Intervals Frequency


    90-99 3
    80-89 8
    70-79 15
    60-69 10
    50-59 4
    40-49 6
    30-39 4

    Part IV. Find the probabilities of each question.

    ____________ 34. If three coins are tossed, in how many ways can they fall?
    ____________35. How many ways are there in getting a double when two dice are rolled?

    Part V. Mother Lily wants to eat fruit salad. She has a basket that contains of 4 grapes and 2
    apples. If two fruits are taken from the basket one after the other, construct the probability
    distribution of the random variable A representing the number of apples. Construct its
    probability histogram. Use the blank page.

    Part VI. Refer to item 36-46. Find the following probabilities.


    47. P( A>2) __________ 49. P( A=3) ________________

    48. P ( A> 1) __________ 50. P ( A<4) ________________


    2

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