1. According to a survey of the top 10 employers in a major city in the Midwest, a worker spends an average of 413 minutes a day on the job. Suppose the standard deviation is 26.8 minutes and the time spent is approximately a normal distribution. What are the times within which approximately 99.7% of all work days will fall?
2. 386.2 and 439.8
3. 359.4 and 466.6
4. 332.6 and 493.4
5. 399.6and 493.4

1. Attendance at NASCAR races is generally normally distributed. Based on data from the last two seasons, it was found that on average 102,000 people attended theDaytona500. It was also determined that attendance has a standard deviation of 6,000. If a track is considering enlarging the grandstand, what percentage of the races will see attendance above between 102,000 and 108,000?
2. 34%
3. 68%
4. 50%
5. 95%

1. The weights of the squirrels that are terrorizing my birds and eating all of the bird food from my feedersare normally distributed with a mean of 3.6 pounds and a standard deviation of 0.4 pounds. Based on this, what percentage of squirrels will weight between2.8 poundsand 4.8 pounds?
2. 99.7%
3. 68%
4. 97.35%
5. 95%

1. The weights of the squirrels that are terrorizing my birds and eating all of the bird food from my feedersare normally distributed with a mean of 3.6 pounds and a standard deviation of 0.4 pounds. Based on this, what percentage of squirrels will weight between 3.2 pounds and 4.0 pounds?
2. 99.7%
3. 68%
4. 34%
5. 95%

1. The weights of the squirrels that are terrorizing my birds and eating all of the bird food from my feedersare normally distributed with a mean of 3.6 pounds and a standard deviation of 0.4 pounds. Based on this, what percentage of squirrels will weight between 2.4 pounds and 2.8 pounds?
2. 2.35%
3. 2.50%
4. 13.5%
5. 4.70%