- #1
StatsCat33
- 2
- 0
- Homework Statement
- According to a survey, only 20% of customers who visited the website on a major retail store made a purchase. Random samples of 75 are selected. 90% of the samples will have less than what percentage of customers who will make a purchase after visiting the website? (Round 2 decimal places)
- Relevant Equations
- SD = sqrt (p(1-p)/n)
1. I first started by finding the Standard Deviation and got it to be SD = sqrt((.15)(.85)/75) = .0412
2. I then thought it was was a probability they wanted me to find and deal with a normal distribution.
I found the normalcdf (-1000000000,.9,.15..0412) and I got 1. I assumed that was wrong and then stopped.
2. I then thought it was was a probability they wanted me to find and deal with a normal distribution.
I found the normalcdf (-1000000000,.9,.15..0412) and I got 1. I assumed that was wrong and then stopped.