Mathematics, 17.04.2020 02:28 ronnie7898
A company that manufactures light bulbs claims that its light bulbs last an average of 1150 hours. A sample of 25 light bulbs manufactured by this company gave a mean life of 1090 hours with a standard deviation of 85 hours. The significance level is 5%. A consumer research group wants to test the hypothesis that the mean life of light bulbs manufactured by this company is less than 1150 hours. What is the value of the test statistic, t? Assume that the population is normally distributed.
Answers: 2
Mathematics, 21.06.2019 14:40, cassiemyers60
Given the statements, "a square root of 16 is 4," and "a square root of 9 is -3," complete the following blanks with the correct truth-values. p is and q is , so the statement, "a square root of 16 is 4 or a square root of 9 is -3" is .
Answers: 3
Mathematics, 21.06.2019 17:00, michibabiee
Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.
Answers: 1
Mathematics, 21.06.2019 18:30, kimmosley80
The school that imani goes to is selling tickets to the annual dance competition. on the first day of the ticket sales the school sold 7 adult tickets and 5 child tickets for a total of $96. the school took in $40 on the second day by seling 3 adult tickets . find the price of an adult ticket and the price of a child ticket. solve by using substitution elimination college prep algebra math heres the 2 equations i came up with 7x+5y=96 and 3x+2y= -40 show all workiv be stuck on this.
Answers: 1
Mathematics, 22.06.2019 01:50, coolquezzie
The area of each triangle is 7 square units. the surface area of the triangular prism is
Answers: 1
A company that manufactures light bulbs claims that its light bulbs last an average of 1150 hours. A...
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