medium · GRE Quant
Seed germination percentages in an agronomy plot study are normally distributed with mean 78 and standard deviation 4. Use the approximation that each mean-to-one-standard-deviation band contains 34%, each one-to-two-standard-deviation band contains 14%, and each tail beyond two standard deviations contains 2%. A plot with a germination percentage of 70 falls in which region of the distribution?
- Within 1 SD of the mean
- Between 1 and 2 SD below the mean
- Between 1 and 2 SD above the mean
- More than 2 SD below the mean
- More than 2 SD above the mean
Sign up free to see the explanation and track your rank →
More GRE Quant practice
- DUAL-SCALE GRAPH: Helix Biotech — Headcount and Revenue per Employee, 2022–2026 Left axis:
- A store marks up a product by 20% over its cost, then during a sale discounts the marked p
- Solve for x: x - 5 = √(x - 3)
- Which of the following must be a factor of the integer n if n^2 is divisible by 72?
- Common information: n is an integer and 2^n = k. Quantity A: 2^n+1 + 2^n+1 Quantity B: 2^n
- 0 < a < b < 1. Quantity A: dfracab Quantity B: dfraca+1b+1
- A logistics firm reports monthly shipping cost and on-time delivery rate for one lane. The
- A fair six-sided die (faces 1 through 6) is rolled twice, and the two results are recorded