If we want to construct a 95% confidence interval for the average battery life for smartphone c users that extends at most 2 hours on each side of the mean, how many users do we need to survey?

At which stage of marketing strategy would the marketing team address the question, "should we engage in these practices? "

Which of the following is a disadvantage to choosing a sole proprietorship business structure? question 9 options: the owner has personal responsibility for the company's liabilities. the owner has to share the profits with partners. the owner is still liable for personal debts. the owner has to report to shareholders.

Simon, aged 10, is invited to a classmate's birthday party at an exclusive ski resort on march 15th. the day will include 4 hours of snowboarding, lunch and birthday cake. simon's mother checks a box on the invitation that says "yes, we will attend" and returns it to the classmate's address. unfortunately, they later don't attend the party when simon comes down with the flu. on march 17th, simon's mother receives an invoice in the mail from simon's classmate for $35 that says, "party no-show fee." can simon's classmate collect the fee?