Measuring Data
Find the 5-number summary for the following data set: 2, 5, 5, 6, 8, 9, 12, 15, 18.
What is
Min: 2, Q1: 5, Median: 8, Q3: 13.5, Max: 18
In a study measuring how "Study Hours" affect "Test Scores," which is the independent (explanatory) variable?
What is Study Hours
If a normal distribution has a mean of 50 and a standard deviation of 5, what is the z-score for a value of 42?
What is -1.6
A box contains 8 green pens and 4 black pens. You pick a pen, put it back, and then pick another. Are these events independent or dependent?
What is independent
SUPRISE MATH QUESTION:
Find the probability of getting at least 2 tails if you flip a fair coin 4 times.
What is 0.6875
Find the mean and population standard deviation of the following data set: 10, 12, 14, 16, 18.
What is
Mean: 14, Population Standard Deviation: 2.83
A manager at a theater wants to survey customers. They randomly select 5 rows in the theater and survey every person sitting in those specific rows. Which sampling method is being used?
What is Cluster Sampling
What does a z-score of +2.0 represent regarding the value's position relative to the mean?
The value is 2 standard deviations above the mean
A group consists of 5 teachers and 5 students. If 3 people are chosen at random to form a panel, what is the probability that all 3 are students?
What is 0.083
What is a group of crows called?
What is a Murder?
Given the data set: 10, 12, 13, 15, 16, 20, 45. Find the Interquartile Range (IQR).
What is IQR = 8
A researcher mails a satisfaction survey to 1,000 randomly selected customers of a large retail chain. Only 45 customers mail the survey back. Because the small group of respondents may have different opinions than the 955 people who did not return the survey, what specific type of bias is this?
What is Non Response Bias
A standardized test has a mean of 500 and a standard deviation of 100. A student scores 600. Using the empirical rule (68-95-99.7), approximately what is their percentile?
What is 84th Percentile
A basketball player has a 70% free-throw average. If they shoot 4 times, what is the probability they make exactly 3 shots?
What is 0.4116
Name all 5 ninjas from LEGO Ningago
Kai, Cole, Zane, Jay, Llyod
A set of test scores has a mean of 80 and a standard deviation of 8. If the teacher adds 5 bonus points to every student's score, what are the new mean and the new standard deviation?
What is New Mean = 85; New Standard Deviation = 8
A car manufacturer claims that their new electric vehicle gets an average of 300 miles on a single charge. A consumer advocacy group suspects the actual average mileage is lower than what the company claims. Write the null hypothesis and the alternative hypothesis for this situation.
What is H_0: u = 300 H_a: u < 300
A factory produces lightbulbs with an average lifespan of 1000 hours and a standard deviation of 50 hours. What is the probability that a randomly selected bulb lasts between 925 and 1075 hours?
What is 0.8664
If P(A) = 0.30 and P(B|A) = 0.40, find P(A and B)
What is 0.12
What is Jousting