Hi 
I am new here on the forum and find it a bit difficult to learn the way to go at different statistics/probability - problems.
For the most times I am able to figure it out myself doing some research, but the last two problems has got me stuck for a few days.
I would be really thankful for any tip as how to adress the problem correct, so that I can try and find the solution myself.
Okay here is the first case:
- In one age-group of skiing in a ski-race we assume that the end time X (in minutes) is the normal distributed with the expectancy of 290 and a standard deviation of 27. What is the probability for one skier in this age-group will use more than 300 minutes (5 hours)?
comment: Not sure how to adress this problem, thought I am told to use a chart for cumulative standardized normal distribution table.
I am not sure how to adress normal distribution problems in general.
The second case:
- A shopping-center have an average visit per minute of 23 new costumers. Use normal distribution, with and without whole-number-correction to find the probability for that in t=14 minutes there will come at least 336 costumers to the shopping-center.
comment: Not sure how to adress normal distribution problems.
If there is anyone who would help me get started, I would be very grateful!
Thanks!
I am new here on the forum and find it a bit difficult to learn the way to go at different statistics/probability - problems.
For the most times I am able to figure it out myself doing some research, but the last two problems has got me stuck for a few days.
I would be really thankful for any tip as how to adress the problem correct, so that I can try and find the solution myself.
Okay here is the first case:
- In one age-group of skiing in a ski-race we assume that the end time X (in minutes) is the normal distributed with the expectancy of 290 and a standard deviation of 27. What is the probability for one skier in this age-group will use more than 300 minutes (5 hours)?
comment: Not sure how to adress this problem, thought I am told to use a chart for cumulative standardized normal distribution table.
I am not sure how to adress normal distribution problems in general.
The second case:
- A shopping-center have an average visit per minute of 23 new costumers. Use normal distribution, with and without whole-number-correction to find the probability for that in t=14 minutes there will come at least 336 costumers to the shopping-center.
comment: Not sure how to adress normal distribution problems.
If there is anyone who would help me get started, I would be very grateful!
Thanks!
