What conditionns or assumptions must be considered before

Reference no: EM13635512

Dilbert decides he needs a new job. He begins working at a computer repair store, fixing laptops, desktop computers, and tablets. His new position requires him to track the number of repairs made to each computer (both major and minor). The store only works on two major brands of computers, and data for last month's repairs are given below. Note that the "average" is of the number of repairs per computer.

Manufacturer	n	Average	Standard Deviation
A	17	3.4	1.2
B	21	4.7	1.7

A) What conditionns or assumptions must be considered before doing any inference procedures?

B) Find a 99% confidence interval for the difference in mean number of repairs made. You do not need to interpret this interval

C) Test whether there is a difference in the mean number of repairs between the two manufactureers. Use alpha = 0.01

Reference no: EM13635512

Questions Cloud

Assume that the upward flight is an exact reverse of the : a steel ball is dropped from a buildings roof and passes a window taking 0.115 s to fall from the top to the bottom of

Is the extra expense of coaching helpful in gaining : let us suppose that sat mathematics satm scores in the absence of coaching vary normally with mean 515 and ? 100.

Calculate the force exerted by each pier f1 and f2 of a 50 : calculate the force exerted by each pier f1 and f2 of a 5.0 m footbridge with a mass of 100 kg evenly distributed when

Estimate how long the sun would have to shine on the earth : the lsquosolar constant which describes the amount of energy that the earth absorbs as radiation from the sun is 1340 w

What conditionns or assumptions must be considered before : dilbert decides he needs a new job. he begins working at a computer repair store fixing laptops desktop computers and

Find the variation of vapor temperature and phase interface : a liquid-vapor phase change process in microgravity conditions is carried out sufficiently slowly so that a one

A 60-cm-diameter horizontal pipe gradually narrows to 40cm : a 6.0-cm-diameter horizontal pipe gradually narrows to 4.0cm. when water flows through this pipe at a certain rate

Draw and label a flow chart of the process giving the : a double effect evaporator is used in feed forward mode to produce fresh water from sea water vontaining 3.5wt

Good machines are expected to produce no more than 1 : dilbert is in charge of evaluating a new machine that manufactures shoelaces. in particular he needs to estimate the

User Account

All Pages