8. From the following table find the number of students who obtained less than 45 marks: Marks No. of students 30-40 40-50 42 50-60 60-70 70-80 31 31 51 35

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A: Given: First Quartile = 180 Third Quartile = 211 Median = 197.5

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Q: The following box-plot contains the cholesterol levels of 100 patients. 154 180 211 265 197.5 + 225…

A: Given Min=154 Q1=180 Q2=197.5 Q3=211 Max=265

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A: Note: Hi there thank you for posting the question. As there are multiple sub-parts, according to our…

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Q: The number of sick days taken (per month) by 200 factory workers is summarized below. Number of…

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A: a) -1 to +1 = P(-1<z<1) = P(Z<1)-P(Z<-1)  =0.8413-0.1587 =0.6826 =68.26%

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Q: Example 7.2. From the following table, estimate the number of students who obtained marks between 40…

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A: Given the data 5.0  30.3  14.7  19.2  6.2  9.0  19.6  22.9  41.6  11.4  17.3  31.1  9.6  12.8  12.2…

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Q: If frequency of an item x is given as 6, and total number of items in the collected data is 37; then…

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Q: From the following table, estimate the number of students who obtained marks between 40 and 45:…

A: first we make the cumulative frequency table  marks :                      40      50     60…