Suppose that the distribution of scores of 1,000 students who take a standardized intelligence test is a normal distribution. Also suppose that the distribution's mean is 475 and itsstandard deviation is 20.a) How many scores do we expect to fall between 435 and 515?b) How many scores do we expect to fall below 435?score(s) fall between 435 and 515.a) It is expected that(Round to the nearest whole number as needed.)

Answered: Image /qna-images/answer/bc376100-dd5a-4a2f-ba24-7b47ae642dac.jpg

Answered: Suppose that the distribution of scores…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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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…
At a college the scores on the chemistry final exam are approximately normally distributed, with a mean of 73 and a standard deviation of 11. The scores on the calculus final are also approximately normally distributed, with a mean of 78 and a standard deviation of 12. A student scored 79 on the chemistry final and 81 on the calculus final. Relative to the students in each respective class, in which subject did the student do better? a) Calculus b) There is no basis for comparison c) Chemistry d) The student did equally well in each course e) None of the above
1. Prove the following statements:a) The standard deviation is zero if all the observations have some constant value.b) The standard deviation does not change by the change of origin.c) The standard deviation is affected by the change of scale.
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Solve step by step in digital format Suppose that the average income of the engineers hired at REDUNO presents an approximately normal behavior with a mean of $17,000and a standard deviation of $3,000 a) What percentage of the employees will have incomes greater than $20,000 ?b) In a random sample of 50 employees, about how many people can be expected to have incomes of less than $15,000 ?

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