Whats yalls insta if u have

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

You have 138.72 in your saving account u take out 45.23 and 18.00 you deposit 75.85 into your account