subject
Mathematics, 07.05.2021 01:00 babycakez3500

Researchers for a company that manufactures batteries want to test the hypothesis that the mean battery life of their new battery is greater than the known mean battery life of their older version. The researchers selected random samples of 32 of the new batteries, subjected the batteries to continuous use, and determined the mean and standard deviation of the battery lives in the sample. Which of the following is an appropriate test for the researchers' hypothesis? a. A one-sample z-test for a population mean.
b. A one-sample t-test for a population mean.
c. A one-sample z-test for a population proportion.
d. A matched-pairs t-test for a mean difference
e. A two-sample t-test for a difference between means

ansver
Answers: 2

Other questions on the subject: Mathematics

image
Mathematics, 20.06.2019 18:04, ToxicMonkey
So me with this math problem. find the value of x the table shows the masses of 50 eggs. mass: 40-44 eggs: 6 mass: 45-49 eggs: x mass: 50-54 eggs: 12 mass: 55-59 eggs: 10 mass: 60-64 eggs: 7 mass: 65-69 eggs: 2 you!
Answers: 1
image
Mathematics, 21.06.2019 20:00, faithyholcomb
Someone answer asap for ! max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a. the median of max’s data is 250 b. more than half of the data points max recorded were 177 centimeters. c. a data point chosen at random is as likely to be above the mean as it is to be below the mean. d. every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.
Answers: 1
image
Mathematics, 21.06.2019 23:00, lucylooe11
Simplify using positive exponents only.
Answers: 2
image
Mathematics, 22.06.2019 02:40, hgdthbgjnb83661
How many significant figures are there in the number 10.76?
Answers: 1
You know the right answer?
Researchers for a company that manufactures batteries want to test the hypothesis that the mean batt...

Questions in other subjects:

Konu
Mathematics, 13.11.2020 17:10