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Q1) One hundred Lower Wabash Tech students take 10-question multiple-choice test with 4 answers to each question, exactly one of which is right. All of the students are unprepared and should guess at each question.
Recognize random variable of interest, and give explanation for your answer. Find out the probability distribution of this random variable. i.e.,, find out the probability of getting each possible score.
You are given the following data.
Number of Absences
Final Grade
0
97
1
90
2
75
82
3
77
68
4
60
5
58
6
46
i) Create a scatter plot for the data.
ii) Determine the correlation coefficient for the data.
iii) Determine the equation for regression line for the data, and forecast final grade of a student who misses 3.5 days.
A fair die is rolled nine times. What is the probability that an odd number (1,3 or 5) will occur less than 3 times?
In textile industry, a manufacturer is interested in the number of blemishes or flaws occurring in each 100 feet of material. Of the following probability distributions, the one that most applies to this situation is the.
As it is a 2 _ 2 table, try also two-tailed two-sample z test for ð1 = ð2 and verify that z2 is same as your chi-square statistic. Which test do you favour? Describe why?
Utilizing form of Regression method which would give you highest performing model to forecast Sales. Utilizing your model forecast the sales
If we wanted to shorten the interval of the estimation of the true mean of Saturday sales to a width of $600 in total, what should the size of our sample be to achieve it?
Subjects at both sites were classified as dropouts if they left the study before the conclusion, or completers if they finished the study
The casino game craps is based on rolling two dice. Here is the assignment of probabilities to the sum of numbers on the up face when two dice are rolled:
Determine the mean and standard deviation of this distribution?
The study does not give sufficient evidence to support the claim that less than 75% of college students spend less than $250 per semester on textbooks.
What is the probability that Sara will die in her 60 th year? Using this probability and the $50,000 death benefit, what is the expected loss to Big Rock Insurance?
Formulating null and alternative hypothesis to test the claim averaging about $5000.
If she has chosen the first weeks rides, how many ways can she choose four more different rides for the second week? Assume that order does not matter.
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