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You have a list of IQ scores for a classroom in a particular university. The IQ...

  1. You have a list of IQ scores for a classroom in a particular university.

The IQ scores are: 118, 123, 124, 125, 127, 128, 129, 130, 130, 133, 136, 138, 141, 142, 149, 150, 154.

  1. Construct the frequency diagram with 5 class intervals.
  2. Compute the mean, median and mode for this frequency distribution using the formulas for grouped data.
  3. Construct the histogram.
  1. Using the data of #1 a sample of 100 students will be taken to estimate the average mark in mathematics courses. Determine the number of students to be taken from each year level to produce the 100 sample size.
  2. Why is stratified sampling better than random sampling?
  3.   What are the methods of collecting data.
Math   Statistics-And-Probability   
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