Bin Frequency 58.9 3 60.9 6 62.9 8 64.9 13 66.9 6 68.9 4 More 0
Introduction to Statistics Test 1 Excel portion Fall 2007 Dr. V. Sapko
Name Complete the following items and email the exam to Dr. Sapko at [email protected] by midnight on Friday. I
SUMMARY OUTPUT Regression Statistics Multiple R 0.028848 R Square 0.000832 Adjusted R Square -0.02546 Standard Error 38.09698 Observations 40 ANOVA df Regression Residual Total SS MS 1 45.93625 45.93625 38 55152.43 1451.38 39 55198.36 F Significance
-in statistics, a hypothesis is a claim or statement about a property of a population -a hypothesis test (or test of significance) is a standard procedure for testing a claim about a property of a population -if under a given assumption the probabili
09-11-07
Introduction To Statistics
Vocab Ch. 2-1, 2-2
Key Terms (2.1) -center: a representative or average value that indicates where the middle of the data set is located -variation: a measure of the amount that the data values vary among themse
-mean, proportion, and variance are unbiased estimators -List possible samples and find means. The # of books sold over course of 4 day book fair were 139, 199, 241, 61. Assume sample size of 2 randomly selected w/replacement Samples: 139-139, 139-19
P(BIA)=P(A and B)/P(A) Probability of B given A P(BIA) does not = P(AIB) if it does, they're dependent Use if ABC is different than CBA Use if ABC is the same as CBA 0!=1 Probability Distribution Rules-1.) sum of all probabilities=1 2.) each value is
Suppose that a class of 30 students is assigned to write an essay. 1)suppose 4 essays are randomly chosen to appear on the class bulletin board. How many different groups of 4 are possible? 2.)Suppose 4 essays are randomly chosen for awards of $10, $
-requirements for p-test: 1) simple random sample, 2) conditions for a binomial distribution are satisfied, and 3) np5 and nq5 are satisfied -methods: 1) p-value, 2) traditional, 3) confidence interval; use same methods as sec 8.2; use the standard n
-the test statistic is a value used in making a decision about the null hypotheses, and is found by converting the sample statistic to a score with the assumption that the null hypothesis is true -the critical region/rejection region is the set of al
-Requirements -simple random sample -the population standard deviation is known -either or both of these conditions are satisfied: The population is normally distributed or n>30 -Point Estimate of the Population Mean -the sample mean (x w/line) is th
-the two major applications of inferential statistics involve the use of sample data to 1.) estimate the value of a population parameter, and 2.) test some claim (or hypothesis) about a population -how to estimate population parameters: proportions,
Assume that the weight loss for the first month of a diet program varies between 6 and 12 lbs, and is spread evenly over the range of possibilities so that there is a uniform distribution. Find the probability of the given range of pounds lost: Betwe
09-11-07
Introduction To Statistics
Notes Ch. 2-3
-histograms are very important graphs that depict the nature of distributions -be able to look at a histogram and be able to understand the nature of the distribution of the data -to construct a hi
09-11-07
Introduction To Statistics
Notes Ch. 2-1, 2-2
(2.1) -ultimate objective is to understand the data, not just obtaining a table or graph -important characteristics of data include: (1) Center-a representative or average value that indicates
09-08-07
Introduction To Statistics
Vocab Ch. 1-4
KEY TERMS -observational study-observe and measure specific characteristics, but doesn't attempt to modify the subjects being studied -experiment-apply some treatment and then proceed to observe it
09-06-07
Introduction To Statistics
Notes Ch. 1-3
-important to focus on interpretation of data and results rather than the actual mathematics -when sample data are collected in an inappropriate way, such as a voluntary response sample, no statist
09-05-07
Introduction to Statistics
Notes Ch. 1-1, 1-2
-with two degrees of separation, the target person is not counted -concept of 6 degrees of separation: 1967 study by psychologist Stanley Milgram found that two random residents in the United
Gillian Goodhue
09-10-07
Homework
1.4 (1-5, 7-11 odd, 32) 1.) In a random sample, members from the population are selected in such a way that each individual member has an equal chance of being selected. A simple random sample involves subjects th