# Practice Set 5 This distribution has only one parameter. The curve is skewed to the right for small df and becomes symmetric for large df.

Practice Set 5

- This distribution has only one parameter. The curve is skewed to the right for small
*df*and

becomes symmetric for large *df*. The entire distribution curve lies to the right of the vertical

axis. The distribution assumes nonnegative values only

- t distribution
- Normal distribution
- Chi-square distribution
- Linear regression.

- Find the value of x2 for 12 degrees of freedom and an area of .035 in the right tail of the chi-

square distribution curve. What is the value of chi-square? Round to three decimal places

- Determine the value of x2 for 14 degrees of freedom and an area of .25 in the left tail of the

chi-square distribution curve. What is the value of chi-square? Round to three decimal places

- Determine the value of x2 for 23 degrees of freedom and an area of .95 in the left tail of the

chi-square distribution curve. What is the value of chi-square? Round to three decimal places.

- Α ____________ compares the observed frequencies from a multinomial experiment with

expected frequencies derived from a certain pattern or theoretical distribution. The test

evaluates how well the observed frequencies fit the expected frequencies.

- Goodness-of-fit test
- Chi-square test
- Linear regression

- The __________ are the frequencies obtained from the performance of a

multinomial experiment. The expected frequencies are the frequencies that we expect to obtain

if the null hypothesis is true.

- Observed frequencies
- Expected frequencies
- Fluctuating frequencies

- The expected frequency of a category is given by Ε = np where n is the sample size and p is the

probability that an element belongs to that category if the null hypothesis is true. The

________ for a goodness–of–fit test are k – 1, where k denotes the number of possible

outcomes (or categories) for the experiment.

- Number of observations
- Degrees of freedom
- Total population

- This model includes only two variables, one independent and one dependent, is called a _____
__1________. The**___**is the one being explained, and the__2______**___**is the one used to explain the variation in the dependent Select the correct letter that would make the sentence true.__3_____ - Select a letter from the list to make this statement true.
- Select a letter from the list to make this statement true.
- Select a letter from the list to make this statement true.
- Linear model
- Qualitative variable
- Multivariate analysis of variance
- Independent variable
- Simple regression model
- One-way Analysis of Variance
- Dependent variable
- Quantitative variable

- A population data set produced the following information.

N=465, ∑x=3920, ∑y=2650, ∑xy=26,570, ∑x2=48,530

Find the population regression line. Round to three decimal places. Use the format as an example when submitting your equation 456.123 + 789.123x

- The following information is obtained from a sample data set.

n=12, ∑x=66, ∑y=588, ∑xy=2244, ∑x2=396

Find the estimated regression line Use this format as an example when submitting your equation 123 – 45x