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# MA8391 Question Paper Probability and Statistics Regulation 2017 Anna University

## MA8391 Question Paper Probability and Statistics Regulation 2017

5. What are the parameters and statistics in sampling BTL -1 Remembering
6. State level of significance. BTL -1 Remembering
MA8391 Question Paper Probability and Statistics
A random sample of 25 cups from a certain coffee dispensing
machine yields a mean x = 6.9 occurs per cup. Use 0.05 level of
significance to test, on the average, the machine dispense μ = 7.0
ounces against the null hypothesis that, on the average, the machine
dispenses
μ < 7.0 ounces. Assume that the distribution of ounces per cup is
normal, and that the variance is the known quantity σ2=0.01 ounces
MA8391 Question Paper Probability and Statistics
Twenty people were attacked by a disease and only 18 were survived.
The hypothesis is set in such a way that the survival rate is 85% if
attacked by this disease. Will you reject the hypothesis that it is more
at 5% level. MA8391 Question Paper Probability and Statistics

In a large city A, 20 percent of a random sample of 900 school boys
had a slight physicaldefect. In another large city B, 18.5 percent of a
random sample of 1600 school boys had somedefect. Is the
difference between the proportions significant?

A standard sample of 200 tins of coconut oil gave an average weight
of 4.95 kg with a standard deviation of 0.21 kg. Do we accept that
the net weight is 5 kg per tin at 5% level of significance?

Write down the formula of test statistic‘t’ to test the significance of
difference between the means.

 Subject Name Probability and Statistics Subject Code MA8391 Regulation 2017 File PDF