The number of contaminating particles on a silicon wafer prior to a certain rinsing process was determined for each wafer in a

Question

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 Number of particles 1 2 3 5 6 7 89 10 13 14 4 11 11 12 3 1 Frequency 2 3 12 15 20 10 4 5 2 I LAUSE SALT 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 decir between five and ten particles inclusive strictly between five and ten particles 10 0 1 c Draw a histogram bar chart using relative frequency on the vertical axis Percent 15 Percent 15 Percent 15 10 5 01234 6 7 8 9 1011121314 10 0 1 2 3 4 5 6 7 8 9 1011121314 How would you describe the shape of the histogram The histogram is positively skewed and bimodal The histogram is negatively skewed and bimodal The histogram is fairly symmetric and bimodal The histogram is positively skewed and unimodal Number Number 10 5 Percent 20 15 10 0 1 2 3 4 5 6 7 8 9 1011121314 5 0 1 2 3 4 5 6 7 8 9 1011121314 Number Number

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