Stats Help for College-level Students

Statistics

Regression analysis and hypothesis testing

Correlation & Regression problems.

16) x 2 4 5 7 8 y 2 3 2 6 4 The estimated regression equation for these data is y= 0.75+ 0.51 x. What percentage of the total sum of squares can be accounted for by the estimated regression equation? What is the value of sample correlation coefficient. 24) x 2 4 5 7 8 y 2 3 2 6 4 a) What is the value of s ...continues

Computation of percentiles in frequenncy distributions

On a paper and pencil measure of self-esteem, subjects in an experiment received the following scores: 113 131 138 145 154 116 131 138 145 155 119 132 138 146 156 119 133 140 146 157 121 134 140 148 163 125 134 141 150 167 129 134 141 151 129 135 142 152 130 137 143 141 What is the percentile rank of score 15 ...continues

determining the corner point

The Electrocomp Corporation manufactures two electrical products: air conditioner and large fans. The assembly process for each is similar in that both require a certain amount of wiring and drilling. Each air conditioner takes 3 hours of wiring and 2 hours of drilling. Each fan must go through 2 hours of wiring and 1 hour of ...continues

Simple Linear Regression Analysis: Can the cost of flying a commercial airliner be predicted using regression analysis? Suppose a study is conducted to predict cost of a flight by number of passengers using only Boeing 737s traveling 500 miles in comparable routes during the same season of the year. Given here is Excel output for a simple regression model that was developed for this case. Analyze the computer output.

Regression Analysis Can the cost of flying a commercial airliner be predicted using regression analysis? Suppose a study is conducted to predict cost of a flight by number of passengers using only Boeing 737s traveling 500 miles in comparable routes during the same season of the year. Given here is Excel output for a simple ...continues

A report on housing in metropolitan areas suggests a regression model relating the mean price of a housing unit to several factors, such as median income, average monthly rent of new units and vacancy rate. A sample of 25 cities was taken. a) Write down the multiple regression equation. b) Interpret the meaning of the intercept and regression coefficients.

A report on housing in metropolitan areas suggests a regression model relating the mean price of a housing unit to several factors, such as median income, average monthly rent of new units and vacancy rate. A sample of 25 cities was taken. a) Write down the multiple regression equation. b) Interpret the meaning of the inter ...continues

A realtion between moment generating functions and the expectation of a random variable.

Use moment generating functions to find an expression for the expectation of a random variable.

Measure of central tendency

Here is Appendix N. I need to calculate the three measure of central tendency. Also, develop a five and seven class frequency distribution table for the data. Please show steps so that I can follow it to compare my solution.

computation of percentiles

A student took two exams and achieved the 7th highest grade on each of them. Forty three students took one of the tests(Math) and 197 students took the other test(Geography). Compare his performance on the two tests in terms of percentile ranks. In which exam did he do better? Please show computations and explain.

principle component analysis

the experiment went as follows: 6 samples were given 18 attributes following a sensory evaluation test. these have been put into s selection of charts - the first has the Plot of loadiing and has the 18 attributes dotted across the chart, X axis is PC1 and Y axis is PC2. a second chart has the same but has the 6 samples dotted ...continues