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# Class Notes for Statistics at University of Saskatchewan

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##### STAT 245 Lecture Notes - Lecture 3: Box Plot, Unimodality, Standard Deviation

Stat 245 Lecture 3 Describing Data with Numerical Measures 1. The Mean (or Average) Symbols: Population mean, Sample mean, Formula: = ...

Statistics
STAT 245
lawrencecheng
##### STAT 245 Lecture Notes - Lecture 2: 5,6,7,8, Histogram, Bar Chart

Stat 245 Lecture 2 Distributions and Graphs A survey was done to determine the eye colour of a sample of 50 students. The results are as follow: What do we see from the above result? All we can tell is ...

Statistics
STAT 245
lawrencecheng
##### STAT 245 Lecture Notes - Lecture 10: Scatter Plot Exam

STAT 245.3 CORRELATION REGRESSION Exercises 10 Solution Ten students who graduated from university in 2000 with a degree in a Social Science were interviewed in 2011 with the following information on incomes collected. T...

Statistics
STAT 245
lawrencecheng
##### STAT 245 Lecture Notes - Lecture 9: Analysis Of Variance, Oxygen Saturation, Contingency Table Exam

STAT 245 Exercises 9 Solutions 1. Several water samples were taken at each of four locations of the South Saskatchewan River as it flows by and through Saskatoon. The quantity of dissolved oxygen, a measureof water polluti...

Statistics
STAT 245
lawrencecheng
##### STAT 245 Lecture Notes - Lecture 8: Statistical Hypothesis Testing, Confidence Interval, Test Statistic Exam

Stat 244 Exercises 8 Solutions PROBLEM A: Stopping distances on dry pavement when travelling at 90 kph for a random sample of 12 vehicles equipped with a certain allseason tire were measured in metres and recorded as follo...

Statistics
STAT 245
lawrencecheng
##### STAT 245 Lecture Notes - Lecture 7: Quality Control, Simple Random Sample, Confidence Interval Exam

STAT 245 Exercises 7 Solutions PROBLEM A: A company that manufactures custom jackets for groups such as sports teams is so busy that it operates both a day shift and an evening shift. Quality control is a concern to the co...

Statistics
STAT 245
lawrencecheng
##### STAT 245 Lecture Notes - Lecture 6: Guesstimate, Sampling Distribution, Random Variable Exam

STAT 245 Exercises 6 Solutions PROBLEM A: In filling bags with flour, the automatic filling process dispenses amounts that follow a Normal distribution with a mean of 10.15 kg and a standard deviation of 0.12 kg. The label...

Statistics
STAT 245
lawrencecheng
##### STAT 245 Lecture Notes - Lecture 5: Random Variable, Simple Random Sample, Old Age Security Exam

STATISTICS 244.3 Exercises 5 SOLUTIONS PROBLEM A: Suppose Z is a Standard Normal random variable. That is, Z ~ N (0, 1). For each question, draw an appropriate picture and then find the numerical answer. [1]. Find each of...

Statistics
STAT 245
lawrencecheng

Statistics
STAT 245
lawrencecheng
##### STAT 245 Lecture Notes - Lecture 3: Mutual Exclusivity Exam

STAT 245.3 Exercises 3 Solutions PROBLEM A: How physically active are students? A random sample of students was obtained by sampling student numbers from a list of such numbers for current students. Each student indicated ...

Statistics
STAT 245
lawrencecheng
##### STAT 245 Lecture Notes - Lecture 2: Decimal Mark, Box Plot, Interquartile Range Exam

STAT 245 Exercises 2 Solutions Q1. The following data will be used in this exercise: 3.1 4.9 2.8 3.6 2.5 4.5 3.5 3.7 4.1 4.9 2.9 2.1 3.5 4.0 3.7 2.7 4.0 4.4 3.7 4.2 3.8 6.2 2.5 2.9 2.8 5.1 1.8 5.6 2.2 3.4 2.5 3.6 5.1 4.8 1...

Statistics
STAT 245
lawrencecheng
##### STAT 245 Lecture Notes - Lecture 1: Simple Random Sample Exam

STAT 245.3 Exercises 1 Solutions PROBLEM: The data given on the next page represent annual incomes in thousands of dollars (to the nearest hundred dollars) of the 250 employees of a large local company. The data is present...

Statistics
STAT 245
lawrencecheng
##### STAT 245 Lecture Notes - Lecture 51: Minitab, Confidence Interval, Test Statistic Premium

Since the value 1 2 falls in the confidence interval, it is possible that the two population means are the same. There insufficient evidence to indicate a difference in the two population means. 10.25...

Statistics
STAT 245
William Laverty
##### STAT 245 Lecture Notes - Lecture 50: Minitab, Test Statistic, Null Hypothesis Premium

Several alternative values of are given in this exercise. (Get a Minitab output using power calculation and make conclusions to do the followings) Insert your output a For 6 ,(difference = 65=1 in Minitab dialog) 7.346 P x...

Statistics
STAT 245
William Laverty
##### STAT 245 Lecture Notes - Lecture 49: Null Hypothesis, Test Statistic, Confidence Interval Premium

The maximum value of p p will occur when p 1 p.5 . Since values of p 1and p2are unknown, the use of p .5 will provide a valid sample size, although it may be slightly larger than necessary. Then, solving for n, we obtain ....

Statistics
STAT 245
William Laverty
##### Statistics - Reference Guides

This Guide provides an easy to follow summary of all basic principles that are the foundation to Statistics and Probabilities. Using a combination of charts and sample equations, the key concepts are developed and the esse...

Econometrics
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