Mathematics, 20.11.2019 17:31, myanniespencer39

Batteries produced by a manufacturing company have had a life expectancy of 135 hours. because of an improved production process, the company believes that there has been an increase in the life expectancy of its batteries. a sample of 42 batteries showed an average life of 140 hours. from past information, the standard deviation of the population is known to be 24 hours. test to determine whether there has been an increase in the life expectancy of batteries. what is the test statistic, and what conclusion can be made at the .10 level of significance?

Answers: 3

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 16:20, edjiejwi

An equation representing lyle’s hedge-trimming business is a = 12n - 300 where a is the amount of profit or loss in dollars and n is the number of hedges trimmed. how would the graph of lyle’s business change if the equation a = 10n - 300 represented his business? the graph would be flatter. the graph would be steeper. the graph would start closer to the origin. the graph would start lower on the y-axis.

Answers: 2

continue

Mathematics, 21.06.2019 21:00, mawawakaiii

Asequence has its first term equal to 4, and each term of the sequence is obtained by adding 2 to the previous term. if f(n) represents the nth term of the sequence, which of the following recursive functions best defines this sequence? (1 point) f(1) = 2 and f(n) = f(n − 1) + 4; n > 1 f(1) = 4 and f(n) = f(n − 1) + 2n; n > 1 f(1) = 2 and f(n) = f(n − 1) + 4n; n > 1 f(1) = 4 and f(n) = f(n − 1) + 2; n > 1 i will award !

Answers: 1

continue

Mathematics, 22.06.2019 02:00, Crtive5515

Acompany had forty one employees and ordered nine hundred eighty uniforms for them. if they wanted to give each employees the same number of uniforms, how many more uniforms should they order so they don't have any extra

Answers: 1

continue

Mathematics, 22.06.2019 04:00, jeanieb

Which expression equals 9^3 sqrt 10 a. 5 sqrt 10 + 4 sqrt 10 b. 5^3 sqrt 10 + 4 ^3 sqrt 10 c. 5 sqrt 10 + 4^3 sqrt 10 d. 5^3 sqrt 10 + 4 sqrt 10

Answers: 1

continue

Do you know the correct answer?

Batteries produced by a manufacturing company have had a life expectancy of 135 hours. because of an...