4. The principal claimed that the student IQ in the school was 78. A random sample of 20 students was tested and showed mean score of 85, with a standard deviation of 8. Is this group significantly higher in IQ at the.01 level of significance? 5. The diameter of 110 tin cans by SIMBA Co. averaged 16.5 cms. with a standard of 2.54 cms. Is the diameter of the group significantly lower than the length of the diameter of the tin cans which is 20 cms.? 6. The average weight of a can of milk produced by TIBA Co. is 2.3 kgs. A random sample of 15 cans of milk was weighed and showed a mean weight of 2 kgs. with a standard deviation of 0.13 kgs. Test the hypothesis that the mean weight of these cans is lesser than what is standard at the .01 level of significance. 7. A random sample of 10 drinks from a soft drink machine was an average content of 18.9 deciliters with a standard deviation if 2.38 deciliters. Determine at the .05 level of significance if this group is significantly different from the population with a mean of 21 deciliter.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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4 The principal claimed that the student IQ in the school was 78. A random sample of
20 students was tested and showed mean score of 85, with a standard deviation of
8. Is this group significantly higher in IQ at the .01 level of significance?
5. The diameter of 110 tin cans by SIMBA Co. averaged 16.5 cms. with a standard of
2.54 cms. Is the diameter of the group significantly lower than the length of the
diameter of the tin cans which is 20 cms.?
6. The average weight of a can of milk produced by TIBA Co. is 2.3 kgs. A random
sample of 15 cans of milk was weighed and showed a mean weight of 2 kgs. with a
standard deviation of 0.13 kgs. Test the hypothesis that the mean weight of these
cans is lesser than what is standard at the .01 level of significance.
7. A random sample of 10 drinks from a soft drink machine was an average content of
18.9 deciliters with a standard deviation if 2.38 deciliters. Determine at the .05 level
of significance if this group is significantly different from the population with a mean
of 21 deciliter.
Transcribed Image Text:4 The principal claimed that the student IQ in the school was 78. A random sample of 20 students was tested and showed mean score of 85, with a standard deviation of 8. Is this group significantly higher in IQ at the .01 level of significance? 5. The diameter of 110 tin cans by SIMBA Co. averaged 16.5 cms. with a standard of 2.54 cms. Is the diameter of the group significantly lower than the length of the diameter of the tin cans which is 20 cms.? 6. The average weight of a can of milk produced by TIBA Co. is 2.3 kgs. A random sample of 15 cans of milk was weighed and showed a mean weight of 2 kgs. with a standard deviation of 0.13 kgs. Test the hypothesis that the mean weight of these cans is lesser than what is standard at the .01 level of significance. 7. A random sample of 10 drinks from a soft drink machine was an average content of 18.9 deciliters with a standard deviation if 2.38 deciliters. Determine at the .05 level of significance if this group is significantly different from the population with a mean of 21 deciliter.
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