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Statistics Assignment
Please answer the following questions using your own words and using the only the attached chapters for reference and in text citations. Answers must be 200 words.
Introductory Statistics Reference
Mann, P. S. (2016). Introductory Statistics (9th ed.). Retrieved from The University of Phoenix eBook Collection database.
Chapter 1
1. Describe the two meanings of the word statistics. Explain the types of statistics.
2. Explain the meaning of an element, a variable, an observation, and a data set.
Chapter 2
3. Why do we need to group data in the form of a frequency table? Explain. How are the relative frequencies and percentages of categories obtained from the frequencies of categories? Illustrate with the help of an example.
Chapter 3
4. Explain how the value of the median is determined for a data set that contains an odd number of observations and for a data set that contains an even number of observations. Briefly explain the meaning of an outlier. Is the mean or the median a better measure of center for a data set that contains outliers? Illustrate with the help of an example.
Discuss the notations and two properties of probability.
Compute the mean and variance of the number of bottles imported. Compute the mean and variance of the number of cigarette cartons imported. Compute the covariance and the coefficient of correlation.
police records show that there has been an average of 2 accidents per week on a new freeway. calculate the
in a sample of 61 randomly seldom selected students 31 flavored the amount being budgeted for next years intramural and
A method of determining if relationships exist between two variables is:
a researcher with ministry of transportation is commissioned to study the drive times to work one-way for u.s. cities.
If the bid is accepted , the company will make $36000 minus the cost of the bid. What is the expected value in this situation?
Make a scatterplot of the data. Find the equation of the least-squares regression line for predicting BAC from number of beers and add this line to your plot. Briefly summarize what your data analysis shows.
Generate a vector x = (x1,..., x10,000) con- sisting of 10,000 random standard Normals. Let y = (y1,..., y10,000) where yi = exi . Draw a histogram of y and compare it to the pdf you found in part (a).
the moment generating function for a random variable x is given by mxt 14 3411-t tgt1. determine formulas for the
You may use the manual method of calculation, or show how MegaStat (or other software) is used to analyze the data. Be sure to discuss the interpretation of results.
a. For each age group, pick the midpoint of the interval for the x value. (For the 80+ group, use 85.) b. Using ages as the independent variable and Number of driver deaths per 100,000 as the dependent variable, make a scatter plot of the data.
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