What is Statistics? Statistics Organizing and Summarizing Data What is Statistics? Questions What are Box-and-Whisker Plots? What is the importance of descriptive statistics? What is the difference between a population and a sample? Why do statisticians use samples? What are some benefits of using a sample instead of a census? What is the difference between continuous data and discrete data? Give an example of each: continuous data and discrete data. Which of the following would be classified as categorical data? age, gender, height, letter grade on most recent exam, percentage correct on most recent exam, number of likes to a Facebook posting, weight, eye color, gas mileage of your car Two days before an election, city officials projected that 67% of all registered voters would vote. Two days after the election, after reviewing the actual voting turnout, they announced that 81% of registered voters had actually voted. Which of these percentages is a parameter, and which is a statistic? How do you determine whether the quantitative variable is discrete or continuous given the length of a piece of string? Is temperature a discrete or continuous variable? How to tell the difference between discrete or continuous random variables given the weight of bags of apples, with 20 apples in a bag? Is a pair of dice is rolled, and the sum to appear on the dice is recorded a discrete or continuous data? Is the time it takes to complete an exercise session a discrete or continuous data? What is a descriptive analysis? A student read that we are 95% confident that the average score of young men on the quantitative part of the National Assessment of Educational Progress is 267.8 to 276.2. ? Blood types A, B, O, and AB have percentages 40%, 20%, 30% and 10%. If two individuals are chosen at random, assuming independence, how do you find probability that both blood type A? Blood types A, B, O, and AB have percentages 40%, 20%, 30% and 10%. If two individuals are chosen at random, assuming independence, how do you find probability that neither is of blood type A? Two standard dice are rolled, what is the probability of rolling a pair (both the same number)? A jar has 6 marbles, 1 blue, 1 white, 1 green, 1 yellow, 1 red, 1 black. If 5 marbles are removed at random, what is the probability that the green marble was removed? Out of 8 men and 10 women, a committee consisting of 6 men and 5 women is to be formed. How many such committees can be formed when one particular man A refuses to be a member of the committee in which his boss's wife is there? When considering a competitive market for apartments in a city. What would be the effect on the equilibrium price and output after the following changes (other things being held constant):? If the chances of rain are 40% and 20% for the two days of the weekend, what is the chance that it will rain on at least one of the two days? What is the expected value to gain in following game and how much one is expected to win if one plays #100# games? How do you find the probability of getting a sum of 5 on the first toss of two number cubes and? How do you evaluate P(10,2)? Pr(A|B) = kys? A family has 8 girls and 4 boys. A total of 2 children must speak on behalf of the family at a local benefit. What is the probability that at least one boy will be chosen? What the relationship between descriptive and inferential statistics? I'm looking at an example where a poll of different salaries was conducted to estimate the average salary of a region in Canada. Would this be descriptive or inferential? What does "correlation vs causation" mean in statistics? Does the following example fit the principle of Correlation vs. Causation? How do you define and differentiate between a correlation and causal findings in research? Can statistics prove correlation, causality, both, or neither? Is the connection between smoking and cancer a correlation or causality? In an election poll, Sam received 17,454,085 votes. Are these votes continuous or discrete? Why? What is a random variable? What is an example of a discrete random variable and a continuous random variable? What does qualitative, quantitative data, discrete, and continuous mean? What do the terms nominal, ordinal, ratio, interval, discrete and continuous mean and refer to? Is "The weight of bags of apples, with 20 apples in a bag" continuous or discrete data? Why? Is "The number of times required for a modem to dial an internet provider before connecting" continuous or discrete data? Why? Is "A pair of dice is rolled, and the sum to appear on the dice is recorded" continuous or discrete data? Why? Is "The time it takes to complete an exercise session" continuous or discrete data? Why? Is the "area of a playground" discrete or continuous? Why? Is the "amount of perfume in a bottle" discrete or continuous? Why? Is the "pineapple yield per hectare" discrete or continuous? Why? What is the difference between discrete and continuous measurement? What is discrete, categorical, ordinal, numerical, non-numerical and continuous data? As of November 30,2014, there was 4364 Walmart stores in the U.S and 6193 outside of the U.S. Are the number of Walmart stores discrete or continuous? Why? Is "The weights of the tackles in professional football teams." continuous or discrete? Why? Are the calendar months an example of a continuous or discontinuous variable? Is the number of children in family continuous or discrete? Is "The number of points scored during a basketball game." discrete or continuous? Is "The square footage of a house." discrete or continuous? Is the speed of an airplane discrete or continuous? Is the number of books in a college bookstore discrete or continuous? Is the blood pressure of a group of students discrete or continuous? Is the height of an oak tree discrete or continuous? Is the cost of a loaf of bread discrete or continuous? Is the number of goals in a football match discrete or continuous? Is it true that non mutually exclusive events can only be independent events? Is the "time in minutes students will need to complete a test" a discrete random variable? Why or why not? In how many ways 3 girls and 3 boys be seated in a row of 6 chairs if 1 boy and 1 girl refused to sit next to each other? At a football game, a researcher randomly asks 100 people to name their favorite sport. Is this a biased sample? What the difference between continuous and discrete variations? Explain why a graphical display might be skewed. How do you ensure data isn't skewed? Question #f07f8 Make the truth table of the proposition ¬q→[(pΛq)V~p]? Organizing and Summarizing Data View all chapters Measures of Center Measures of Variability Categorical Graphs Simple Quantitative Displays Frequency Distribution The Histogram Measuring Relative Position Boxplots Linear Transformations What is Statistics? Prev