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4.       A factory manager collected a sample of 10 packets of 3-in-1 coffee and the...

4.       A factory manager collected a sample of 10 packets of 3-in-1 coffee and the weights (in grams) of each packet are recorded as follow:
                              25    23    26    28    24   
                              21    26    24    25    27

Mean = 24.9 ; Standard Deviation = 2.0248

Find a 90% confidence interval for the weights of the 3-in-1 coffee.        [4 marks]

Math   Statistics-And-Probability   
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