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 wearing 515 chemicals per day? a. t-test for the population meanb. z-test for the population meanc. z-test for the population proportiond. t-test for the population proportion

a. t-test for the population mean

Step-by-step explanation:

given that 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.

Note that here we have only sample std deviation and not population.

So better to use t test here.

Sample size is not given so whatever be the sample size here t test would be more appropriate.

Here we are testing for mean.  So the correct answer is

a. t-test for the population mean

step-by-step explanation:

60.9774

step-by-step explanation:

because when you add 47.6 plus 7.32 equals 54.92

and when you add .0574 + 6= 6.0574

and when you add 54.92 and 6.0574 you get the answer of 60.9774.

plzz mark brainlest last one got deleted. cause i didn't explain it but i did but i understand what the mod meant