1. +-6 points DevoreStat9 1.E.019. The number of contaminating particles on a si
ID: 3040865 • Letter: 1
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1. +-6 points DevoreStat9 1.E.019. The number of contaminating particles on a silicon wafer prior to a certain rinsing process was determined for each wafer in a sample of size 100, resulting in the following frequencies Number of particles Frequency 0 1 2 3 4 5 6 789 10 11 12 13 14 1 2 3 12 11 15 15 10 13 4 5 3 3 2 1 (a) What proportion of the sampled wafers had at least one particle? At least five particles? (Round your answers to two decimal places.) at least one particle at least five particles (b) What proportion of the sampled wafers had between five and ten particles, inclusive? Strictly between five and ten particles? (Round your answers to two decimal places.) between five and ten particles, inclusive strictly between five and ten particles (c) Draw a histogram using relative frequency on the vertical axis Percent Percent 15 15 Number 01 2 3 45 6 78 9 10111213 14 01 2 3 45 6 78 9 10111213 14 Percent Percent 15 10 10 o 012345 6 78 9 10111213 14 012345 6 78 9 10111213 14 o How would you describe the shape of the histogram? The histogram is positively skewed and unimodal The histogram is fairly symmetric and bimodal The histogram is negatively skewed and bimodal The histogram is fairly symmetric and unimodal The histogram is negatively skewed and unimodal The histogram is positively skewed and bimodal Need Help? .Readi liktonteri Read It Talk to a TutorExplanation / Answer
a) at least one particle =1-P(0 partilce) =1-1/100 =0.99
at least 5 particles =(71/100) =0.71 (as 71 particels are 5 or more)
b)
b/w 5 and 10 inclusive =62/100 =0.62
strictly b/w 5 and 10 =42/100 =0.42
c) histogram: bottom right graph is correct
the historam is fairly symmetric and bimodal.
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