Homework Answers
Ans: Histogram (I)
The number of mathematics course other than statistics cannot have negative value. If mean is 1.1, this means the peak is mostly in the region around 1. The least possible value is 0. So, ther will be a steep curve from 0 to 1. As the number of courses increase, the frequency of students taking that many course will decrease. We cannot expect to see large number of people who have taken 2 or more number of mathematics courses other than statistics 2. So, with increase along axis, we will see a steady decline of frequency. Therefore, the distribution is right skewed (positive skewness) and histogram corresponding to it is (i)
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11. One term, about 700 Statistics 2 students at the University of California, Berkeley, were asked...
Problem 2 Fifty part-time students were asked how many courses they were taking this term. The...
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In a survey of introductory statistics students, an instructor asked her students to report how many...
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2. Suppose that a random sample of 41 state college students is asked to measure the...
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1) (15%) For Applied Management Statistics class you want to know how college students feel about...
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A study was conducted to determine success rates of students enrolled in the Statistics courses o...
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In a survey of introductory statistics students, an instructor asked her students to report how many Facebook friends they had. Suppose that the intent is to study whether there is an association between number of Facebook friends and a person's sex. Use the difference between the sample means as your statistic. The standard deviation found using a randomization-based test of whether the average number of Facebook friends men have is different from that of women is 97.89, and the p-value...
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Question 11 A group of 53 college students from a certain liberal arts college were Type numbers in the boxes. randomly sampled and asked about the number of alcoholic drinks they have 10 por in a typical week. The purpose of this study was to compare the drinking habits of the students at the college to the drinking habits of college students in general. In particular, the dean of students, who initiated this study, would like to check whether the...
1) (15%) For Applied Management Statistics class you want to know how college students feel about the transportation system in Barcelona. a) What is the population in this study? b) What type of sample would you use and why? 2) (25%) A manager of an e-commerce company would like to determine average delivery time of the products. A sample of 25 customers is taken. The average delivery time in the sample was four days. Suppose the delivery times are normally...
A study was conducted to determine success rates of students
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for the fall semester of 2015. A random sample of 14 students was
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race, and the attendance record (# of classes not attended this
semester). Use the results from the following table to answer all
parts of #2
f. For the age variable, construct 3...
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