What is Statistics?

Topic Page

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]?