A marketing researcher wants to estimate the mean amount spent ($) on Amazon.com by Amazon Prime member shoppers. Suppose a random sample of 100 Amazon Prime member shoppers who recently made a purchase on Amazon.com yielded a mean amount spent of $1,500 and a standard deviation of $200.

1. Using a 0.05 level of significance, state your decision.

2. Using the critical value approach, is there evidence that the population mean amount spent on Amazon.com by Amazon Prime member shoppers is less than $1,475?

3. Determine the p-value and interpret its meaning.