Assumming the data is normally distributed and representative of all production estimate the number welds with a strength below 176N, for a production run involving 3000 welds. For quality acceptance less than 0.75% of the welds can be below the 176N, is the process acceptable?.
The Mean is 251.5 and the standard deviation is 29.2532 thanks in advance.
please can someone help me with this question above, my answer for Z= -2.58091 is this correct? if it is how do i look it up on the Z table and what calculations are involved to see if the process is acceptable?
The Mean is 251.5 and the standard deviation is 29.2532 thanks in advance.
please can someone help me with this question above, my answer for Z= -2.58091 is this correct? if it is how do i look it up on the Z table and what calculations are involved to see if the process is acceptable?