Nathalie and Jonathan decides to play a coin flipping game. If 3 heads and 1 tail appear in any order out of four flips, then Nathalie wins. If 2 tails and 1 head appear in any order out of three flips, then Jonathan wins. Who is more likely to win?
What is Jonathan.
100
Tonya wants to estimate the time it will take her to walk to Dacula each morning. Because she is trying to estimate the time, she will calculate this.
What is confidence interval?
100
When describing any data, you should BS. What does this mean?
What is be specific!
100
Erica decides to listen to hard-rock music when studying IB Music Theory in hopes that she would get better exam grades. What is the variable of listening to the music called that will influence her exam grades (the response variable)?
What is explanatory variable?
100
Power is complement of _______.
What is type 2 error.
200
Assume Donte and Frances have nothing in common. In probability terms, what is it called when two events have nothing in common?
What is mutually exclusive?
200
We use z tests for proportions and chi square tests for ___________.
What is distributions? (frequency)
200
When describing scatter plots, we should talk about the center, unusual features, shape, and _________.
What is spread?
200
In studies, we often ______ factors, such as gender and age to control possible confounding variables.
What is block?
200
According to the_______________ theory, the sample mean is approximately normally distributed, regardless of the population distribution, provided that a large random sample size n is taken from the population.
What is central limit theorem?
300
The type of distribution that has fixed number of observations
What is binomial distribution?
300
Anwar wants to run for president in the year 2034. He wants to know if there is an association between one's muscle size and preference for a candidate to determine the group he focus on campaigning. After obtaining data, which test would allow Anwar to see if there is any association?
What is chi square test of independence?
300
If a distribution has negative skewness, then what will be the order of averages of mode, median, and mean be, from lowest to highest?
What is mean, median, mode?
300
_______________ analysis is usually done when randomization cant be done. (hint: think of a couple)
What is matched pair?
300
Sydney has eight identical blue socks and eight identical green socks all mixed up in her sock drawer. If she reaches in without looking, what is the minimum number she must pull out to get a matching pair?
What is three?
400
The mean of a binomial random variable is:
What is U(myoo)=np?
400
Which condition do we use during z tests but not during t tests?
What is success/failure condition? (np and nq greater than 10)
400
The category with the largest n-size or the peak of a distribution defines the:_______. (hint: starts with the letter m)
What is mode?
400
This allows the experimenter to rule out alternative explanations due to the confounding effects of extraneous variables.
What is control?
400
A list of 11 positive integers has a mean of 10, a median of 9, and a unique mode of 8. What is the largest possible value of an integer in the list?
What is 35?
500
Kendal bought a peculiar pair of dice from Dat. The probabilities of rolling 1, 2, 3, 4, 5, and 6 on each dice are in the ration 1:2:3:4:5:6. She wants to know the probability of rolling a sum total of 7 (her favorite number) on the two dice. What is the probability in simplest fraction form?
What is 8/63?
500
In order to measures the degree to which one categorical variable is distributed disproportionately across one or more other categorical variables, Terrance decides to use this.
What is chi square test statistic?
500
Ben obtained the mean and standard deviation of 100 observations as 40 and 5.1. However, she wrongly copied down an observation as 50 instead of 40. What is the actual mean?
What is 39.9?
500
In a matched pairs design, participants within each pair receive ________ treatments.
What is different?
500
For how many integers x is the number x^4-51x^2+50 negative? (hint: could be negative or positive)