1. Based on the table below market research information of 2000 customers who shop at a local drug store.The store is interested in the customers buying preferences of toothpaste. Assume that this data represents the population. (15 points)

1. What is the population mean and standard deviation for the proportion of customers who use Crest toothpaste?
2. Using the data, select the first 200 customers as sampling data. Of these 200 samples, compute a point estimate and standard error of the portion of customers who prefer crest toothpaste
3. Using the sample data in part b, of these 200 samples, what is the 95% confidence intervals for this sample proportion data

Row Labels	Count of Customer
Aquafresh	212
Colgate	357
Crest	579
Mentadent	229
Others	623
Grand Total	2000

Row Labels	Count of Customer
Aquafresh	18
Colgate	31
Crest	60
Mentadent	27
Others	64
Grand Total	200