Mathematics, 09.10.2019 20:00 WOLFIEPOOF
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 anincreasein 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. a. start by writing down the null and alternative hypotheses. b.next, calculatethe relevant test statistic. c.what conclusion can be made at the .10 level of significance? make sure to interpret in words.
Answers: 3
Mathematics, 21.06.2019 17:30
Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?
Answers: 1
Mathematics, 21.06.2019 23:30
Peyton's field hockey team wins 4 games out of every 7 games played. her team lost 9 games. how many games did peyton's team play?
Answers: 2
Batteries produced by a manufacturing company have had a life expectancy of 135 hours. because of an...
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