Mathematics, 20.03.2020 01:59 ruba806
Jamestown Steel Company manufactures and assembles desks and other office equipment at several plants in western New York State. The weekly production of the Model A325 desk at the Fredonia Plant follows the normal probability distribution with a mean of 200 and a standard deviation of 16. Recently, because of market expansion, new production methods have been introduced and new employees hired. The vice president of manufacturing would like to investigate whether there has been a change in the weekly production of the Model A325 desk. Suppose he wants the significance level to be 0.01.
denote %u03BC to be the population mean of weekly production of the Model A325 after new methods, set up the null hypothesis the vice president wants to test:
a. %u03BC = 200
b. %u03BC %u2260 200
c. %u03BC > 200
d. %u03BC < 200
e. %u03BC %u2264 200
f. %u03BC %u2265 200
2.(continues from the Jamestown question) After taking a sample of 50 obs, you find the sample mean to be 203.5, therefore your test statistic will take value of:
a. 203.5 - 200
b. (203.5 - 200) / 16
c. 203.5 /16
d. (203.5 - 200) / (16/sqrt(50))
where sqrt(50) takes square root of 50, the sample size
3. (continues from the Jamestown question) the rejection region is :
a. z %u2265 z0.01
b. z %u2264 - z0.01
c. z %u2265 z0.01 or z %u2264 - z0.01
d. z %u2265 z0.005
e. z %u2264 - z0.005
f. z %u2265 z0.005 or z %u2264 - z0.005
4. Suppose in the previous problem the vice president wants to know whether there has been an increase in the number of units assembled. Now how should you set up the null hypothesis?
a. %u03BC = 200
b. %u03BC %u2260 200
c. %u03BC > 200
d. %u03BC < 200
e. %u03BC %u2264 200
f. %u03BC %u2265 2000
Answers: 2
Mathematics, 21.06.2019 18:30
Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.
Answers: 2
Mathematics, 21.06.2019 19:00
Stefano accidentally dropped his sunglasses off the edge of a canyon as he was looking down. the height, h(t), in meters (as it relates to sea level), of the sunglasses after t seconds, is shown in the table. during its descent, the pair of sunglasses passed by a climber in the canyon 6 seconds after stefano dropped them. to the nearest meter, what is difference in elevation between stefano and the climber? 166 meters 176 meters 230 meters 240 meters its b.176 i took the test 166 is wrong and 176 is correct
Answers: 1
Mathematics, 21.06.2019 22:30
Ibeg you to me 20. a reaction produces 4.93 l of oxygen, but was supposed to produce 1 mol of oxygen. what is the percent yield?
Answers: 3
Mathematics, 21.06.2019 22:30
Which term below correctly completes the following sentence? if a function has a vertical asymptote at a certain x value, then the function is what at that value
Answers: 1
Jamestown Steel Company manufactures and assembles desks and other office equipment at several plant...
English, 08.10.2019 16:40
Mathematics, 08.10.2019 16:40
History, 08.10.2019 16:40
Physics, 08.10.2019 16:40
Mathematics, 08.10.2019 16:40
History, 08.10.2019 16:40
History, 08.10.2019 16:40
English, 08.10.2019 16:40
Computers and Technology, 08.10.2019 16:40
Chemistry, 08.10.2019 16:40
Mathematics, 08.10.2019 16:40
Mathematics, 08.10.2019 16:40