Hello Openstudy! I was hoping to find some help on homework problems I am working on that I must turn in by the end of the night tonight, would anyone be so kind as to help me with these problems and explain them to me? if so I would greatly appreciate it and would fan and metal anyone willing to help. Thank you! -Krizzzy46

Question

anonymous · Answer

Details: They are statistics and algebra 2 problems mostly

triciaal · Answer

nice letter!
as soon as you post I  will try to help with the algebra questions

anonymous · Answer

Thank you!, one moment please

anonymous · Answer

A company manufactures 2,000 units of its flagship product in a day. The quality control department takes a random sample of 40 units to test for quality. The product is put through a wear-and-tear test to determine the number of days it can last. If the product has a lifespan of less than 26 days, it is considered defective. The table gives the sample data that a quality control manager collected.

39	31	38	40	29
32	33	39	35	32
32	27	30	31	27
30	29	34	36	25
30	32	38	35	40
29	32	31	26	26
32	26	30	40	32
39	37	25	29	34

The point estimate of the mean of the sample is__________ , and the point proportion of the defective units is___________

triciaal · Answer

what is the range?  (highest - lowest)   to  average divide by 2 

arrange all the numbers from lowest to highest the middle is the median = good estimate 

the real mean is the sum of all divided by 40

triciaal · Answer

less than 26 days = defective 
from the group of 40 how many are less than 26?

ratio defective = no <26 / 40

triciaal · Answer

did this have any more sub-parts? 
example how many are expected to be bad for the day?

1/20*2000 expected 100 defects

anonymous · Answer

2 are less than 26, does that mean I would divide 40 by 2?
and no It didn't

triciaal · Answer

defect rate = 2/40 = 1/20

anonymous · Answer

Is there a specific formula I would follow to find the point estimate mean and the point proportion of the defective units?

triciaal · Answer

what is the point of telling what the sample size is ?

triciaal · Answer

then again my stats is not current 
maybe those new  terms have more to it than what I learnt

triciaal · Answer

@satellite73 please help  (real question posted )

anonymous · Answer

no the program they are having me use has some questionable... questions haha. They arent very descriptive