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*

I am not sure how to adress normal distribution problems in general.

**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.

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!