Cnduct the appropiate hyothesis test using icircplusmn

Reference no: EM13624900

The Cardinal Machining Company manufactures nails. The quality control department randomly collects 75 nails from the production line and measures their length. these 75 nails had an average length of 2.938 inches with a variance of 0.155 inches square. Assume the nail length are normallly distributed. a) Consturct the appropiate 95% nfidence interval to determine if it is believable the mean length of Cardinal Machining Company nails is more tn 2.90 inches. b) Using the confidence interval found in part A, can the Cardinal Machining Company conclude the mean length of its nails is more than 2.90 inches? c) Is it believable that the standard deviation of nail lenghts is less than 0.45 inches? Conduct the appropiate hyothesis test using Î± = 0.01. d) Using your part C hypothesis test, can the Cardinal Machining Company conclude the standard deviation of nail lenghts is less than 0.45 inches at Î± = 0.01?

Reference no: EM13624900

Questions Cloud

Consider a normal distribution curve where 90-th percentile : consider a normal distribution curve where 90-th percentile is at 13 and the 15-th percentile is at 7. use this

An environmental group is interested in studying the : an environmental group is interested in studying the effects of engine size cubic inches on the gas mileage of cars

What is the best predicted value for the year 2013 hint : listed below in order by row are the annual high values of the dow jones industrial average for each year beginning

What are some examples of two measurement-level : what are some examples of two measurement-level quantitative variables that are likely to be correlated because they

Cnduct the appropiate hyothesis test using icircplusmn : the cardinal machining company manufactures nails. the quality control department randomly collects 75 nails from the

What is confidence interval in statistics please give an : what is confidence interval in statistics? please give an example.could anyone help me this

Chebyshevs inequality for regular worker the preparation : chebyshevs inequality for regular worker the preparation time for daily work needs 35 minutesday and with standard

What is the difference between standard normal distribution : what is the difference between standard normal distribution and t-distribution?could anyone help me this

Two kg of saturated liquid water at 1 bar is compressed to : two kg of saturated liquid water at 1 bar is compressed to 25 bar and 100degc in a water pump. determine the change in

User Account

All Pages