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

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

Astandard american eskimo dog has a mean weight of 30 pounds with a standard deviation of 2 pounds. assuming the weights of standard eskimo dogs are normally distributed, what range of weights would 99.7% of the dogs have? approximately 26–34 pounds approximately 24–36 pounds approximately 28–32 pounds approximately 29–31 pounds

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?