Mathematics, 15.04.2020 00:53 Jorianes

The average life of light bulbs produced by SABA Electric Co. is expected to be normally distributed with the mean service life of 950 hours and standard deviation of 100 hours. A random sample of 100 bulbs is tested and it has a mean life of 910 hours. Can researcher conclude that the mean service life of the bulbs is less than the expectation? H0 is null hypothesis, and Ha is alternative hypothesis. Which method can researcher use to check the idea?

Answers: 3

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 18:30, millie54

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

Answers: 1

continue

Mathematics, 21.06.2019 19:00, mandilynn22

Let hh represent the number of hummingbirds and ss represent the number of sunbirds that must pollinate the colony so it can survive until next year. 6h+4s > 746h+4s> 74 this year, 88 hummingbirds pollinated the colony. what is the least number of sunbirds that must pollinate the colony to ensure that it will survive until next year?

Answers: 1

continue

Mathematics, 21.06.2019 21:00, Mathcat444

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

Answers: 2

continue

Mathematics, 21.06.2019 22:10, KekePonds1021

Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?

Answers: 1

continue

You know the right answer?

The average life of light bulbs produced by SABA Electric Co. is expected to be normally distributed...