Mathematics, 01.07.2019 16:10 gtrsoccer
Aphotoconductor film is manufactured at a nominal thickness of 25 mils. the product engineer wishes to increase the mean speed of the film, and believes that this can be achieved by reducing the thickness of the film to 20 mils. eight samples of each film thickness are manufactured in a pilot production process, and the film speed (in microjoules per square inch) is measured. for the 25-mil film, the sample data result is x overbar subscript 1 baseline equals 1.15 and while for the 20-mil film, the data yield x overbar subscript 2 baseline equals 1.06 and note that an increase in film speed would lower the value of the observation in microjoules per square inch. (a) do the data support the claim that reducing the film thickness increases the mean speed of the film? use alpha equals 0.10 and assume that the two population variances are equal and the underlying population of film speed is normally distributed. what is the p-value for this test? round your answer to three decimal places (e. g. 98.765). the data the claim that reducing the film thickness increases the mean speed of the film. the p-value is . (b) find a 95% confidence interval on the difference in the two means that can be used to test the claim in part (a). round your answers to four decimal places (e. g. 98.7654).
Answers: 2
Mathematics, 21.06.2019 17:00
The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)
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Mathematics, 21.06.2019 21:00
Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.
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Mathematics, 21.06.2019 23:30
Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?
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Aphotoconductor film is manufactured at a nominal thickness of 25 mils. the product engineer wishes...
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