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1) What is the primary function or purpose of descriptive statistics? 2) What do we call the process of gathering, organizing, summarizing, analyzing, and interpreting data? 3) The performance of financial investments is measured with a percentage know as return on investment. What kind of variable do we call return on investment? 4) What kind of variable is the amount of burglaries reported in a particular city? 5) Name the level of measurement of the total number of auto accidents reported in a certain month? 6) The titles of the job positions in a company, such as chief operating officer or CEO, are examples of what level of measurement? 7) Sneaker sizes, such as 6A, 11D, and 14FF, would be considered which level of measurement? 8) Consider the monthly commissions for first year stockbrokers: $1,200, $1,240, $1,720, $1,350, $1,210, $1,470, $1,186, and $1,320. What are these figures called? 9) A sample of computer workers shows monthly salaries of $1,233, $1,533, $2,230, $1,323, $1,766, $1,23, $2,323, and $1,986. What do we call these ungrouped figures? 10) The sum of the deviations at each data value from this measure of central location will always be zero. 11) Consider any data set, which method of measurement of central location have only one value? 12) Consider the list of people receiving government security: 13) What can a dot plot show us? 14) Test scores for 147 online students are calculated. Where is the location of the test score associated with the third quartile? 15) Consider the results provided by the National Center for Health Statistics reported 883 deaths in recent years. 24 from automobile accidents, 182 from cancer issues, and 333 from heart disease. Using the relative frequency approach, what is the probability that a particular death is due to an automobile accident? 16) Two events A and B are mutually exclusive. What does the special rule of addition tell us? 17) What would we call a list of all possible outcomes of an experiment and their corresponding probability of occurrence? 18) What is the shape of a uniform probability distribution? 19) What is the mean of a uniform probability distribution? 20) Consider normal distribution. The mean plus and minus 1.96 standard deviations will include about what percent of all observations? 21) Consider a standard normal distribution. What will be the probability that z is greater than 1.75?
22) A null hypothesis will make a claim about what? 23) Describe the level of significance? 24) Let’s perform a statistical test of the difference between two proportions at the 0.05 level of significance. If the computed z is -1.07, what will be the correct decision? 25) What condition must be met to perform a test for the difference of two sample means? 26) Consider a hypothesis test that compares two population means. The combined degrees of freedom equal 24. What statement about the sample sizes is NOT true? Let’s assume the population standard deviations are equal. 27) What type of chart do we call it when paired data is plotted? 28) When a variable is used to predict the value of another variable, it is called: 29) 20 randomly selected online students were given 15 multiple-choice problems and 15 open-ended problems that cover the same topics. The teacher wanted to know which questions the students scored better on. What kind of test is this? 30) The weights of 100 units of a product created by two identical processes have same mean, but the standard of process A is 15 while that of B is 7. What is true about this scenario?