# (a) Construct the probability distribution of X.(b) Find the p.pdf

A

(a) Construct the probability distribution of X. (b) Find the probability that the student is in eighth grade. (c) Find the probability that the student is in seventh or eighth grade. (d) Compute the mean My (e) Compute the standard deviation 0 y Test 2 Statistics Your Name Since this is a take home test in each question show or explain your work for credit. Just answer without supporting calculations or explanations will not give you a credit in most of the cases. CHAPTER 6 1) Round all your answers to 3 digits after the decimal point. School days: The following tabie presents the eumbers of students enrolied in grodes 1 twoovg 8 in putile schoos in a certain country. Consider these students to be a population. Let X be the grade of a student randomly chosen from this population. (a) Construct the probability distribution of X. 3 points (b) Find the probability that the student is in eighth grade. 1 point (c) Find the probability that the student is in seventh or eighth grade. 3 points (d) Compute the mean X 3 points (e) Compute the standard deviation X. 5 points.

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### (a) Construct the probability distribution of X.(b) Find the p.pdf

• 1. (a) Construct the probability distribution of X. (b) Find the probability that the student is in eighth grade. (c) Find the probability that the student is in seventh or eighth grade. (d) Compute the mean My (e) Compute the standard deviation 0 y Test 2 Statistics Your Name Since this is a take home test in each question show or explain your work for credit. Just answer without supporting calculations or explanations will not give you a credit in most of the cases. CHAPTER 6 1) Round all your answers to 3 digits after the decimal point. School days: The following tabie presents the eumbers of students enrolied in grodes 1 twoovg 8 in putile schoos in a certain country. Consider these students to be a population. Let X be the grade of a student randomly chosen from this population. (a) Construct the probability distribution of X. 3 points (b) Find the probability that the student is in eighth grade. 1 point (c) Find the probability that the student is in seventh or eighth grade. 3 points (d) Compute the mean X 3 points (e) Compute the standard deviation X. 5 points
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