Jared is in charge of production in a factory that makes light bulbs. the factory made 2,648 light bulbs over the weekend. jared wants to pull a sample of these bulbs for testing. which sample would give jared the most-accurate test results?

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?

Which type of graph would allow us to compare the median number of teeth for mammals and reptiles easily