Amjad, thanks. You brought up an important issues around the number zero. It enabled me to appreciate descriptive statistics. Just because one gets "zero" in their grades. The zero (value) does not take away the fact that the student does not have a grade (property of a feature).
Amazing explanation i really liked your teaching you explained very deeply and easy to understand, same topics i tried with IITM teaching videos not even a single thing I understand, after seeing your video only I'm able to understand the scales of measurement
What is the level of measurement for each of the following variables? a) The color of a karate belt: b) The years in which national elections were held: c) People’s attitude to smoking: d) Academic performance measured by number of mark e) Academic performance measured as fail or pass: f) Political party of the current Member s: of Parliament for your area: g ) The number on the back of a football player: h) The monthly (yearly) salary of civil servants in Ethiopia: i ) The internet service provided by Ethio telecom J) The gross domestic product (GDP) of African countries:
Please work this assignment, ❤❤ Introduction to Statistics (Stat 242), Assignment 1. Write at least five application area of statistics special for your department (specifically for Plant Science). 2. Identify each of the following data sets as either a population or a sample: a. The grade point averages (GPAs) of all students at a college. b. The GPAs of a randomly selected group of students on a college campus. c. The gender of every second customer who enters a movie theater. d. The lengths of Atlantic croakers caught on a fishing trip to the beach. 3. A researcher wishes to estimate the average amount spent per person by visitors to a theme park. He takes a random sample of 30 visitors and obtains an average of 280 birr per person a. What is the population of interest? b. What is the parameter of interest? c. Based on this sample, do we know the average amount spent per person by visitors to the park? Explain fully. 4. If you have an open-end continuous series, which measures of central tendency do you recommend representing this series? Why? 5. If we have frequency distribution which is almost, but not quite, symmetrical and whose mean and mode are 27 and 29 respectively, what will be the appropriate value of the median? 6. Scores on a final exam taken by 150 students have a symmetric distribution with mean 72 and standard deviation 9. What is the median score on the exam? 7. The average score of a special test of knowledge of wood refinishing has a mean of 53 and standard deviation of 6. Find the range of values in which at least 75% the scores will lie. 8. In a moderately asymmetrical distribution, the mode minus the mean is 2.4 the coefficient of variation and skewness are 20% and -0.5 respectively. i. Is the distribution positively or negatively skewed? Why? ii. Find a) The mode b) the median
