Data & Statistics (Standard)

Multi-step exam-style items.

Phase 2 · SAT Math

Data & Statistics: core idea

Median = middle order statistic.

The mean of $6,9,13,x$ is $11$ . Find $x$ .

Hint: The four values total 44. Answer: 16.

1. A fair coin is flipped twice. What is the probability of exactly one head?
2. A sample of $80$ voters has $52$ in favor. Estimate the number in favor among $2,000$ similar voters.
3. The values $2,4,6,8,10$ have a new value $30$ added. What is the new mean?
4. A data set has mean $18$ and standard deviation $3$ . Which value is two standard deviations above the mean?
5. From a standard deck, what is the probability of drawing a heart or a king?
6. A scatterplot trend line is $y=2.5x+4$ . What $y$ value does it predict for $x=12$ ?
7. The median of $1,4,7,9,12,15$ is what?
8. A survey asks only students in the chess club about school lunch. What is the main flaw?
9. The probability of rain Monday is $0.3$ and Tuesday is $0.4$ , independently. What is the probability of rain both days?