Statistical methods
extra credit
[due: 4/9, 2:30 pm
10 points]
Answer the following questions using the lecture by Christopher Monckton An Update on the Science, Economics, and Geopolitics of Global Warming at http:/www.heritage.org/Press/Events/ev031809a
Statistics Test 1 Prof. VanderHoff Spring 2005 All work must be shown on exam to receive credit. 1. [5] The probability drawing a hearts from a deck of cards is . The probability that rolling an even number with a die is . What is the probability of drawi
Statistics Test 3
Prof. VanderHoff
FALL 2004
All work must be shown on exam to receive credit. 1. [15] Test the hypothesis the means of groups 1 and 2 are equal. Use .05 significance level and a two tail test. mean variance Sample size Group 1 35 16 55 Gr
Statistics Test 1
Prof. VanderHoff
FALL 2003
All work must be shown on exam to receive credit. 1. [10] Calculate the statistics below using the following data from a sample:
8 4 7 2 1 4 5 7 -1 3 Mean: Median Mode Range Variance Standard deviation Coeffcie
Statistics Test 2 Prof. VanderHoff Spring 2005 All work must be shown on exam to receive credit. 1. [5] Calculate the probability that the standard normal variable [ z statistic] is between -.45 and 1.36.
2. [8] The mean of a standard test is 100 and the
Statistics Test 3
Prof. VanderHoff
SPRING 2005
All work must be shown on exam to receive credit.
1. [10] Test the hypothesis that the proportion of students who will take another stats class=.6. Use .05 significance
level and a two tail test. A survey of
Statistics Test 1 Prof. VanderHoff Spring 2006 All work must be shown on exam to receive credit. 1. [5] A fan offered a bet of $25 against his $5 that RU-N would win the conference title. What does this tell us about the subjective probability that the fa
Statistics Test 2 Prof. VanderHoff Spring 2006 All work must be shown on exam to receive credit. 1. [8] A class has 20 students; 8 are econ majors. What is the probability of choosing 3 econ majors when 5 students are chosen? [without replacement]
2. [10]
Statistics Test 3
Prof. VanderHoff
SPRING 2006
All work must be shown on exam to receive credit. 1. [15] Test the hypothesis the means of groups 1, 2 and 3 are equal. Use .05 significance level. group mean variance n 1 95 190 20 2 75 140 20 3 70 120 20
2
Statistics Test 1 Prof. VanderHoff Fall 2005 All work must be shown on exam to receive credit. 1. [5] Students are classified into 8 majors and 3 classes. How many ways can a student be classified?
2. [6] The mean price of gas in NJ is $3.28 per gallon an
Statistics Test 2 Prof. VanderHoff Fall 2005 All work must be shown on exam to receive credit. 1. [10] A sample of 64 students has a mean commute time of 28 minutes and a standard deviation equal to 4. What is the 90% confident interval for the population
Statistics Test 3 Prof. VanderHoff All work must be shown on exam to receive credit.
FALL 2005
1 [10] Test the hypothesis that the proportion of students who will travel more than 100 miles over Thanksgiving is .2. The alternative hypothesis is that more
Statistics Test 1
Prof. VanderHoff
FALL 2006
All work must be shown on exam to receive credit. 1. [5] The mean commute time is 37 minutes. The standard deviation is 6. About 95 % of commute times are between _ and _. 2. [8] Tiger Woods golf score averages
Statistics Test 2
Prof. VanderHoff
Fall 2006 All work must be shown on exam to receive credit.
1. [6] Researchers have estimated that Iraqi fatalities since the U. S. invasion of Iraq are about 680,000. What did Steven Moore write about their methods?
2.
Statistics Test 1 Prof. VanderHoff SPRING 2007 All work must be shown on exam to receive credit. 1. [5] The probability that A occurs is .4. The probability that B occurs is .6. The probability that A and B occur is .3. Are A and B independent? 2. [5] The
Statistics Test 2
Prof. VanderHoff
Spring 2007
All work must be shown on exam to receive credit. 1. [5] A normal distribution has a mean=100. Find its standard deviation if 17% of the values exceed 144. 2. [8] What is the probability of winning 3 games in
Statistics Test 3 Prof. VanderHoff Spring 2007 All work must be shown on exam to receive credit. 1 [12] Do you conclude that the proportion of men who believe in global warming [GW] is the same as the proportion of women who believe in GW? Circle either Y
Test the hypothesis that means for a, b and c are equal. Use a 5% significance level and the following data:
a 7 4 7 3 9 b 2 3 1 5 9 c 3 2 1 1 3
Test the hypothesis that means for a, b and c are equal. Use a 5% significance level and the following data:
a
anova 1 2 3 4 5 mean var grand num den F
a 7 4 7 3 9 6 6 4 20 5.67 3.53
b 2 3 1 5 9 4 10
c 3 2 1 1 3 2 1
anova 1 2 3 4 5 mean var grand num den F
a 4 2 5 0 9 4 11.5 3.67 11.67 5.83 2
b 5 4 2 6 8 5 5
c 3 2 1 1 3 2 1
anova 1 2 3 4 5 6 7 mean var grand num d