# Posts by sireesha

Total # Posts: 5

**statistics**

1. Draw a simple random sample of 15 students from your class, and calculate sample mean and sample variance of their heights(use Lottery method ) 2. Three blocks of Coal were analyzed by Four Chemists and the ash-content in the blocks was found to be as under: Chemists Blocks...

**statistics**

Explain laws of supply and demand by taking atleast 1 item for each type of commodity.

**statistics**

collect the annual sales of a super market for 10 years and fit a straight line trend to the data collected and find the trend values

**statistics**

three blocks of coal were analyzed by four chemists and the ash-content in the block was found to be under blocks chemists 1 11 111 1V A 18 15 15 17 B 17 16 14 14 C 13 16 15 14 DO THE blocks differ in their ash-content?do the chemists differ significantly their analysis?also ...

**statistics**

draw a simple random sample of 15 students from your class,and calculate sample mean and sample variance of their heights(use lottery method)

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