Statistics Worksheet

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Category:
Statistics
Subcategory:
Statistics Worksheet
Level:
Academic
Pages:
5
Words:
802
View sample
INSTRUCTIONS: This is not to be written as a paper. Please insert the answers to the questions on this document. Showing work is required! If tables are required insert them. If Excel is used please attach the work book and label each tab with the problem and question it represents. Ensure all data is there including formulas. If a sketch is required please ensure it is scanned and labeled accordingly. Thank you!  WK3 WS1 Discrete Probability Distributions Read the following scenario and complete each of the four problem sets below: Suppose the distribution below represents the probability of a person to make a certain grade in Chemistry 101, where x = the letter grade of the student in the class (A=4, B=3, C=2, 0=1, F=O).   Is this an example of a valid probability distribution? Explain your answer. This is a valid probability distribution because probabilities add up to 1. Determine the probability that a student selected at random would make a C or higher in Chemistry P= 0.34*0.21*0.15 = 0.011 Determine the mean and standard deviation of the grade distribution. Mean = (0.08+0.22+0.34+0.21+0.15)/5 = 0.2 Standard deviation = 0.0963 Make a NEW table that shows only the probability of students passing or failing (i.e. receiving an F) Chemistry 101.   "A professor has 30 students in his or her Chemistry 101 course and wants to determine the probability that a certain number of these 30 students will pass his or her course." Does this represent a binomial experiment? Explain your answer. This is a binomial experiment because binomial experiment has two outcomes being expected which in this case is either fail or pass. Additionally, it has a fixed number of trials which is one. Based on the Pass/Fail table, what is the probability that 24 of the 30 st...
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