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by BlastRoom
Mixed practice across the normal curve, study design, probability, counting, and regression.
#algebra_2
40 questions
One question set, multiple game modes. Tap any game to see it in action. Not sure which to pick?
Answer to place stones and capture territory.
Outrun the snow together.
Earn blasts, then hunt the other team.
Answer to earn energy, then climb.
The class blasts through walls together.
Bid on mystery lots. Most money wins.
Sell tours. Nice, standard, or a total scam.
Answer, restock, and serve the rush.
More correct answers pulls the rope your way.
Answer, then shoot down the alien wave.
Answer, then tap to leap the frozen ridge.
Use the labeled normal curve for package masses, in grams. About what percent of packages have mass in the shaded region?
The labeled normal curve shows the distribution of test scores. About what percent of scores are in the shaded interval?
A data value is 72 in a distribution with mean 64 and standard deviation 4. What is its z-score?
Exam scores have mean 78 and standard deviation 6. A score of 66 has what standardized interpretation?
A value has z-score -1.5 in a distribution with mean 40 and standard deviation 8. What is the original value?
Bottle fill amounts are approximately bell-shaped with mean 2.0 liters and standard deviation 0.1 liter. About what percent fall between 1.7 and 2.3 liters?
In a bell-shaped distribution, about what percent of values are less than a value one standard deviation above the mean?
Student A scores 88 on a test with mean 80 and standard deviation 4. Student B scores 92 on a test with mean 86 and standard deviation 3. Who has the higher standardized score?
Heights are approximately bell-shaped with mean 170 cm and standard deviation 10 cm. What interval contains about 95% of the heights?
Battery lifetimes have mean 20 hours and standard deviation 2 hours. A battery lasts 23 hours. What is its z-score?
A city wants the percent of all registered voters who support a bond. A random sample of 800 registered voters is surveyed. What group is the population?
A researcher records students' study hours and exam scores but does not assign study times. What conclusion is best supported if higher study hours go with higher scores?
A gardener randomly assigns 60 similar plants to two fertilizers and compares growth after six weeks. What feature best supports a cause-and-effect claim?
A survey about prom music is given only to students in the senior parking lot before school. What is the main concern?
In a random sample of 240 students, 62% prefer a later school start time. What is the statistic?
A survey of 900 adults estimates that 54% support a policy, with a margin of error of 3 percentage points. What interval describes plausible population percentages?
A survey reports 49% support for a new library, with a margin of error of 4 percentage points. What conclusion is justified?
A company randomly selects employee ID numbers from its full roster to estimate average commute time. What makes the plan reasonable?
A news website asks readers to click if they support a proposal. What weakness is most likely?
A clinic gives the first 30 patients a new treatment and the next 30 patients a standard treatment. What is the main concern?
A principal wants the true mean GPA of all 11th graders at a school. What is that true mean called?
A school surveys 10 students from each grade, 9 through 12, about lunch choices. Why is this better than surveying only one grade?
Of 150 riders, 90 hold a monthly pass. Of the pass holders, 54 ride daily; of the others, 12 ride daily. A daily rider is chosen. What is the probability the rider holds a pass, rounded to two decimals?
A bag has 5 red marbles and 3 blue marbles. One marble is drawn and kept, then a second is drawn. What is the probability of red then blue?
For events A and B, P(A)=0.4, P(B)=0.5, and P(A and B)=0.20. What relationship does this support?
Rain has probability 0.30, a bus being late has probability 0.20, and the two events are independent. What is the probability that it rains and the bus is late?
A shelter has 40 dogs and 20 cats. Of the dogs, 12 are adopted this week; of the cats, 8 are adopted. An adopted animal is chosen. What is the probability it is a cat?
A player makes 70% of free throws. Digits 0-6 mean a make and 7-9 mean a miss. In the simulated run 10458, how many makes occur?
A spinner lands on A with probability 0.30 and on B with probability 0.70. A random digit 0-9 represents one spin. What assignment matches the probabilities?
Two independent machine parts work with probabilities 0.92 and 0.95. What is the probability that both parts work?
A test flags 18 defective items and misses 2 defective items. It also flags 5 good items and clears 75 good items. If an item is flagged, what is the probability it is defective, rounded to two decimals?
In a class, P(takes art)=0.35, P(takes music)=0.30, and P(takes both)=0.12. What is the probability a student takes art or music?
A coach selects 3 of 9 players to kick first, second, and third. How many ordered lists are possible?
A club chooses 4 of its 12 members for a committee, and job titles are not assigned. How many committees are possible?
A code uses 3 different uppercase letters, and letters cannot repeat. How many codes are possible?
Five different novels will be arranged in a row on a shelf. How many arrangements are possible?
A line y = 2.4x + 15 models quiz score y after x hours of review. What score does the model predict for 6 hours?
A model for plant mass is y = 8.5x + 42, where x is weeks and y is grams. What does 8.5 mean in the model?
Use the scatter plot. What correlation value is most reasonable for the pattern?
A regression model predicts 72 for a data point, but the observed value is 68. What is the residual using observed minus predicted?
Crack the passcode before the zombies get in.
Answer, then swat bugs for bonus points.
Race through questions at your own speed.
Same question on every screen. Fastest wins.
Pick a tile, answer, hit bonuses and steals.
Sequences and Series Review
20 questions
