IT-T(UGRD) Quantitative Methods Study Guide 2023 with complete solution

IT-T(UGRD) Quantitative Methods Study Guide 2023 with complete solution Data collection used for a population. census The characteristic of population based on all units is called parameter while the measure of sample observation is called statistic. True Statistics is only the science of uncertainty and not the technology of extracting information from data. False The mean is sensitive to any change in value, unlike the median and mode, where a change to an extreme or uncommon value usually has no effect. True What is a number or attribute computed for each member of a population or a sample? Measurement Statistics help predicts the future course of action of the phenomena. Forecasting Which is considered as qualitative data? a. The texture of a rock Descriptive Statistics is the branch of statistics that involves organizing, displaying and describing data. True Which among the set is bimodal? {55, 44, 33, 22, 11} Example of this are number of episodes of respiratory arrests or the number of re-intubations in an intensive care unit. c. Discrete Data Standard Deviation is a measure of how spread out is the distribution. False It aims to describe various aspects of the data obtained in the study. c. Descriptive Statistics It is used to make predictions or comparisons about a larger group (a population) using information gathered about a small part of that population. d. Inferential Statistics The statistics are presented in a indefinite form so they also help in condensing the data into important figures. False The randomly selected 100 students for a survey is called a population False Which among the data is a sample? c. One section out of all IT Students It means a subgroup of the members of population chosen for participation in the study Sample One disadvantage of the mean is that a small number of extreme values can distort its value. true The population is not confined to people only, but it may also include animals, events, objects, buildings, etc. True Which is an example of interval scale? a. Time of the day on a 12-hour clock Which of the following definition defines interval scale? a. Have meaningful intervals between measurements, but there is no true starting point (zero). Variables can be defined in terms of measurable factors through a process of _______________________________. Operationalization It is a variable that goes on the y-axis, or vertical axis. d. Dependent Variable It is the variable whose change isn't affected by any other variable in the experiment. a. Independent Variable It is commonly used for analyzing experiment results, testing their significance and displaying the results accordingly. d. Statistical Method This industry use statistical approaches to estimate the number of depositors and their claims for a certain day Banking Which is not an importance of levels of measurements? Helps in solving complex mathematical problems Which is not classified as Nominal? Age The value of statistics is strong because they can serve as predictions as well as probabilities in certain trends. true In this level of measurement, the observations, in addition to having equal intervals, can have a value of zero as well. a. Ratio Point _______________________ is an essential characteristic to measure a ratio between any two variables. Zero Measurement at the interval or ratio level is desirable because we can use the more powerful statistical procedures available for ____________ and _______________________. d. Mean and Standard Deviation Scientific data rarely lead to absolute conclusions. True Say you want to figure out which brand of microwave popcorn pops the most kernels so you can get the most value for your money. You test different brands of popcorn to see which bag pops the most popcorn kernels. Which among the choices is the independent variable? b. Brand of popcorn bags Nominal scale is _______________________ in nature, which means numbers are used here only to categorize or identify objects. Qualitative The central tendency of the ordinal scale is _______________________________. Median Compute the frequency of all nominal variables using what formula? c. =COUNTIF() It is a nominal level variable that can take only two values (yes/no, male/female, Hungarian/non-Hungarian). d. Dichotomy It is often based on statements of statistical significance and probability. d. Modern science Sex or Gender is classified under what level of measurement? Nominal It is the outcome variable measured in each subject, which may be influenced by manipulation of what variable? Independent Using a ratio scale permits comparisons such as being twice as high, or one-half as much. True By default, all variables fall in one of the four scales. True Age is under what level of measurements? Interval Although in an interval scale, since there is an absence of the absolute 0 and it works on the principal of an arbitrary 0, the division of variables is not possible. True Classify the level of measurement it belongs: Score in IQ Test b. Interval It is used as a comparison parameter to understand whether the variables are greater or lesser than one another using sorting. Ordinal It refers to the relationship among the values that are assigned to the attributes for a variable. a. Levels of Measurement The measures of central tendency are mean, median and mode.