If we know that the length of time it takes a college student to find a parking spot in the library parking lot follows a normal distribution with a mean of 3.5 minutes and a standard deviation of 1 minute, 75.8% of the college students will take more than how many minutes when trying to find a parking spot in the library parking lot?
A: 2.4 minutes
B: 2.8 minutes
C: 1.2 minutes
D: 4.4 minutes
A: 2.4 minutes
B: 2.8 minutes
C: 1.2 minutes
D: 4.4 minutes
B
举一反三
- For the following sentences, which sentences are of the specific details? ( ) A: To get to the theater, I have to drive for at least fifteen minutes, or more if traffic is heavy. B: One problem of movie-going is the inconvenience of it all. C: It can take forever to find a parking spot, and then I have to walk across a huge parking lot to the theater. D: There I encounter long lines, sold-out shows, and ever-increasing prices.
- To monitor campus security, the campus police office is taking a survey of the number of students in a parking lot every 30 minutes for a 24-hour period with the goal of determining when patrols of the lot would serve the most students. If X is the number of students in the lot during each period of time, then X is an example of
- Turn left to Mirror Street, and you’ll find a spot in the parking lot there.
- How many minutes ofConcrete mixed in stationary mixers and transported by non-agitating equipment shall be pay? A: 30 minutes B: 20 minutes C: 40 minutes D: 15 minutes
- Turn left to Mirror Street, and you’ll find a_________(空的 spot in the parking lot there.
内容
- 0
I got to the airport only to find that the plane had left______. A: for ten minutes B: since ten minutes ago C: ten minutes D: ten minutes before
- 1
How much time did Reilly typically spend on calling? A: 1,500 minutes B: 600-900 minutes C: 900 minutes
- 2
How late was the train（） A: 20 minutes B: 30 minutes C: 40 minutes
- 3
What is the recommended amount of time spent on cleaning A: 5 minutes B: 10 minutes C: 15 minutes D: 20 minutes
- 4
According to the instructors in this unit, what is the proper length for making an impromptu speech?( ) A: 3 minutes B: 5 minutes C: 4 minutes D: 2 minutes