12-13 paints The number of contaminating partides on a silicon wafer prior to a
ID: 3354157 • Letter: 1
Question
12-13 paints The number of contaminating partides 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: 0 1 23 45 6 7 99 10 12 13 14 1 13 12 11 15 20 10 9 4 5 33 1 Number of particles Frequency (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 ane particle at least five particles (b) What proportion of the sampled wafers had between five and tern 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 Number Number 01234567891011121314 01234567891011121314 Percent Number Number 0 01 2345 6 78 910111213 14 o1234567891011121314 How would you describe the shape of the histogram? The histogram is fairly symmetric and bimodal. The histogram is negatively skewed and bimodal. The histogram is positively skewed and bimodal O The histogram is fairly symmetric and unimodal. The histogram is negatively skewed and unimodal. The histogram is positively skewed and unimodal. Need Help?HoTak to Taer Show My WorkExplanation / Answer
a) P(at least one particle) =99/100 =0.99
P(at least 5 particle) =72/100 =0.72
b) between 5 and 10 inclusive =(15+20+10+9+4+5)/100 =0.63
between 5 and 10 strictly =(20+10+9+4)/100 =0.43
c) top left curve is right
the histogram is fairly symmetric and unimodal
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