# Statistics

John drives to work each morning and the trip takes an average of μ = 38 minutes.
The distribution of driving times is approximately normal with a standard deviation of σ = 5
minutes. For a randomly selected morning, what is the probability that John’s drive to work
will take less than 35 minutes?

1. 👍
2. 👎
3. 👁
4. ℹ️
5. 🚩
1. Use z-scores.

z = (x - mean)/sd

z = (35 - 38)/5

Finish the calculation, then check a z-table for the probability of less than 35 minutes using the z-score.

I hope this will help get you started.

1. 👍
2. 👎
3. ℹ️
4. 🚩
2. 500

1. 👍
2. 👎
3. ℹ️
4. 🚩
3. p=0.2743

1. 👍
2. 👎
3. ℹ️
4. 🚩
4. -0.6---> z-score = 0.2743

1. 👍
2. 👎
3. ℹ️
4. 🚩

## Similar Questions

Still need help? You can ask a new question.