Question 4 of 8

The average US woman wears 515 chemicals on an average day from her makeup and toiletries. A random sample from California found that on average the California woman wears 325 chemicals per day with a standard deviation of 90.5.Which hypothesis test should be used to determine whether the sample contains less than the US average of wearing515 chemicals per day?

t-test for the population mean

z-test for the population mean

z-test for the population proportion

t-test for the population proportion