a. a. Understand what quantitative variables and qualitative variables in statistics are. Upgrade to remove ads. Consider the following data: the height in centimeters of children in a third-grade class. (b) Estimate the correlation. Question: For the following variables, classify each as discrete or continuous, qualitative or quantitative, and determine the level of measurement: a) Salary. What is the independent variable? Number of Students in the class. The median is used as a measure of central tendency when there are outliers in a dataset? a) temperatures of 22 selected refrigerators b) hair color of women on a high school tennis team c) numbers on the shirts of a girl's soccer team d) ages of students in a statistics class Gender b. Once interpreted a conclusion is made based on the data. Createyouraccount. The number of students in a first-grade classroom is a quantitative variable. The mean oxygen level is 4.62mg, with the overall standard deviation of 0.92. a. Massachusetts public schools are composed of approximately average 12:1 student:teacher ratio (2023). Learn about the definition of bias in statistics. False, True or False: Mean value over an infinite number of observations of the. x_1 = weekly income in hundreds of do, A measure of the number of injuries, illnesses, or lost workdays as it relates to a common base rate of 100 full-time employees is called the [{Blank}] rate. Provide an appropriate response. A variable that can not be measured in terms of how much or how many but instead is assigned values to represent categories is called: a. an interaction. Is blood type a quantitative or qualitative variable? Mathematics. Given the followi, Consider a multinomial experiment with n = 250 and k = 4. The outcomes of rolling a 6-sided die ten times. Patient medical record number 5. Identify the following variables as : purely categorical (or qualitative), categorical and ranked, quantitative and discrete or quantitative and continuous: a) the number of students who get a final grade greater than 80% b) dress size: 3, 5, 7, 9, 11, 13 Define and give an example of Qualitative variables. Qualitative means you can't, and it's not numerical (think quality - categorical data instead). The 15 Biggest Failures of the American Public Education System. The distribution of sample mean will also be uniform. Marks of an exam. Qualitative or Quantitative: Beds What level of measurement is this category? (a) Final letter grade received at the end of the semester for students in Stat 305. The sample standard deviation is a measure of spread around the sample mean. A true/false test has 20 questions. Continuous quantitative c. Qualitative continuous d. Qualitative Quantitative data: Quantitative data is data that can be counted. All rights reserved. For a continuous random variable, the total area beneath the PDF must be one. Is a football jersey number a quantitative or a categorical variable? Arithmetic mean _________ b. Enrollment 2. A true-false test of 20 questions is given to 10,000 students. c) Sales volume of MP3. True False Explain. 1. What is the estimated duration and standard deviation of the proje, A data set that consists of 61 numbers has a minimum value of 15 and a maximum value of 73. The distribution of the sample means will also be uniform. 9th - 12th grade. Our experts can answer your tough homework and study questions. The project has 3 steps. A news magazine asks 1200 students what college they attend, and how many times per week they att. If all the students guess on each question, how many students would you expect to get 17 or more questions correct? Assume t, The ANOVA summary table below is for a multiple regression model with four independent variables. What is the dependent variable? Is the number of students in a first-grade classroom a quantitative or qualitative variable? c. Ordinal variable. Also, learn the comparison of each alongside examples for each type of variable. The teacher is measuring a discrete variable. How many observations should a time study analyst plan for in an operation that has a standard deviation of 1.3 minutes per piece if the goal is to estimate the mean time per piece to within 0.4 minutes with a confidence of 95.5 percent? True False, If a sample has an odd number of scores, at least one individual will have a score exactly equal to the median. Fill the rings to completely master that section or mouse over the icon to see more details. Foot size .. Shoe Color. Is the amount of time it takes to assemble a simple puzzle a quantitative or qualitative variable? b. a constant variable. A student must answer 15 true/false questions for a test, but the student did not study well. True or False: The continuous uniform distribution describes a random variable, defined on the interval (a, b), that has an equally likely chance of assuming values within a specified range. He has gathered the following data: What, [{Blank}] is used as an estimate of reliability when one administers a test with x number of items designed to assess a topic, then statistically analyzes the degree to which responses to the items vary together. A research that wants to find out the relationship between the amount of time students spend on preparing for the exam and the marks they get in it. First-listed diagnosis 2. A. Well, statistics is a branch of mathematics completely focused on gathering information, analyse and organize it and then present the findings of it. For the variable described below, indicate whether it is a quantitative or a categorical (qualitative) variable. If you do have javascript enabled there may have been a loading error; try refreshing your browser. Explanations. Number of times the individual changed jobs in the last 5 years is what kind of variable? 24 times. Student i.d number determine whether the quantitative variable is discrete or continuous. A) 7 B) 6 C) 5 D) 4 E) 3, An analyst has gathered data and counted the number of runs with respect to the median. True or false? the low temperature in degrees Fahrenheit on January 1st in Cheyenne, Wyoming Would you have independent and dependent variables in a qualitative study? The most used measure of data dispersion correct B. The number of students in a class is an example of a continuous variable. e. The number of doctor visits. True or false? Rather than examine the records for all students, the dean randomly selects 200 students and finds that 118 of them are receiving financi, At the MBA Notice Board Photocopying Centre, students are known to arrive for photocopying in a Poisson distribution at the rate of 8 per hour. Stay on track with our daily recommendations. True or false? D. Three or more quantitative variables. a. The numbers on the shirts of hockey players. The number of coin flips. The data are quantitative because they consist of counts or measurements. a) What is the difference between qualitative and quantitative data? If the variable is qualitative, categorize it as either ordinal or nominal. 32 degrees Fahrenheit could be a value represented by this variable). 2 types of data: Qualitative data & Quantitative Data. True. True or false? Determine if the variable is qualitative or quantitative. b. A. (b) False. a. The project is completed in 36 weeks b. False. Counting the number of cups of coffee that a store sold in a given day would be an example of a/an: (A) performance appraisal (B) subjective appraisal (C) objective appraisal (D) trait appraisal. A research on how humidity in the air changes over the year in a city. (Round your answer to 1 decimal place.) Statistical quality control C. Population study D. None of these, ____ is the process of verification or correction in the quality of the product when the deviations in the quality are found to be more than expected. C. Two quantitative variables. 3. e.g. Measuring the heights of trees will result in values containing decimals, and these would be any value within the range of possible heights of a tree species. If there are 9 classes in a frequency distribution, then the fifth class must contain the median. The number of students in an English class. 5. Determine which of the following data is quantitative or qualitative: Before continuing, identify the type of data by yourself and then look at the answers and explanations provided below: Test marks are numerical values that can be compared, and have an intrinsic value to them belonging to a scale, they are not labels. True or false? One of the variables related to college success (as measured by GPA) is socioeconomic status. Time series, latent Regression, outcome Regression, independent Time series, outcome 3. A data set consists of the ages at death for each of the 38 past presidents of the United States now deceased. W = COV(X,Y) is a random variable. Is the amount of time a student spent studying for an exam a quantitative or qualitative variable? a. (a) Doing well in statistics should reduce students' math phobia. Dependent B. # Students Range: 1,714 4,046 Avg. Expecta, Suppose a student is testing a hypothesis for a sample of 25 people for the null hypothesis H_o: mu less than or equal to 85 versus the alternative hypothesis H_a: mu is greater than 85. b. Suppose that X and Y are random variables. What statistical attributes would need to be considered if you were trying to investigate how many hours of homework your teachers set each week? Get access to this video and our entire Q&A library, Continuous, Discrete & Categorical Variables: Definition and Examples. One-sample t-test is an example of descriptive statistics. These data consist of audio, images, symbols, or text. Whether person had an accident on Friday the 13th which is quantitative. 2. True or false: Two-way ANOVAs are used when we have multiple dependent variables in our design. A. 4. We track the progress you've made on a topic so you know what you've done. How m, Consider these five values a population: 8, 3, 7, 3, and 7. a. - There are no valid, reliable instrument to measure the attitudes' of elementary age students toward physical education. The two random variables are independent. True or False: If the 90% confidence interval for \mu is from 40 to 50, then the sample mean is M = 45. True or false: Class intervals always equal in size. True or false? [{Blan. A random sample of 72 statistics students generated the following 90% confidence interval: (0.438, 0.642). . Number of students in a class. Whether person had an accident on Friday the 13th which is quantitative. Explain. 1. measured 2. ratio 3. qualitative 4. quantitative, What is the response variable, and is it quantitative or categorical? Number of hands folded by a player in a poker game Is the variable discrete or continuous? An infectious flu virus is spreading through a school. Determine the class boundaries using the 2k greater than or equal to n rule if the data are: a. discrete b. continuous, A work sampling study was performed during a three-hour final exam to determine the proportion of time that students spend using a calculator. Hourly wages of students in fastfood. - True - False. 100% (2 ratings) Transcribed image text: For each of the following, determine whether the variable is qualitative, quantitative and discrete, or quantitative and continuous. Give an example of each. A discrete variable cannot assume an infinite number of values. False, The median of the values 3.4, 4.7, 1.9, 7.6, and 6.5 is 4.05. a) True b) False. Explain. A. What is the difference between qualitative and quantitative data? Qualitative Variables: Sometimes referred to as "categorical" variables, these are variables that take on names or labels and can fit into categories. Which one of the following describes a quantitative, discrete variable? b. Quantitative data are the result of counting or measuring attributes of a population.
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