Chapter 6 and 7

The difference between the observed value of the dependent variable and the value predicted is known as a/an

A measurable factor that defines a characteristic of a population or system.

Regression analysis involving one dependent variable and more than one independent variable is known as _____.

The shape of the t distribution depends on a parameter referred to as:

A single value used as an estimate of the corresponding population parameter.

b_0 gives the intercepts of a regression line.

The hypothesis concluded to be true if the null hypothesis is rejected.

A company wants to find if they are producing at least 60 shoes an hour to test write the hypothesis tests for this?

Your model's b_1 coefficient has a confidence interval .1 to .3. You can be confident in your observed effect.

The degree of correlation among independent variables in a regression model.

Determine whether the alternative hypothesis is left-tailed(lower), right-tailed(upper), or two-tailed: H0: u≥1 Ha: u<1

If one of your independent variables is strongly correlated to another independent variable this known as?

SSR=12 and SST=15 what is the SSE

A soda company wants to find out if they are putting exactly 15 oz of soda in cups. Write the hypothesis tests for this.

In linear regression, the variable that predicts or explains is known as the _____.

The theoretical basis for using a normal probability distribution is the?

A two-tailed test is a hypothesis test in which the rejection region is _____.

Your study has an r^2 value of .68 this tells you?

A sample of individuals in a classroom is taken to determine the proportion of sophomores. What type of data is this?

A likely source of error measuring the height of college students by recruiting from restaurants far from campus.

What are the degrees of freedom for the following data?

A type 1 error is commited when ___.

Determine whether the alternative hypothesis is left-tailed(lower), right-tailed(upper) or two-tailed: H0: u= 1 Ha: u≠1

b_1 gives how much x changes for each 1 unit change in y.

Describes the probability that the observed value would have occurred if the null hypothesis was true.

Which of the following is a reason to avoid taking a census?

To increase statistical significance from .05 to .01 a researcher would need?

What is the determination of our study if we are conducting a lower tail test?

The alpha value for a study with a 95% confidence level is?

An estimate of a parameter that provides an interval believed to contain the value of the parameter is known as the _

A simple random sample of 31 observations was taken from a large population. The sample mean equals 5. Five is a _____.

The ± value added to and subtracted from a point estimate in order to develop an interval estimate of a parameter.

Nonsampling error occurs when the research objective and the population from which the sample is drawn are not aligned.

What is the upper limit of the confidence interval for data with a mean of 40.3 and a margin or error of 2.

How many dummy variables do you need for a categorical variable that includes; a, b, c, d, and e?

The value used to estimate the value of a population parameter.

The range of values over which you have data for a regression model is known as the?

SST= 10, SSR= 6, SSE= 4 what is the coefficient of determination?

Determine whether the alternative hypothesis is left-tailed(lower), right-tailed(upper), or two-tailed: H0:u≤ 1 Ha:u>1

What is the lower limit of the confidence interval for data with a mean of 34.5 and a margin or error of 2.

How much confidence do we have in the strength of our sample?

A null and alternative hypothesis for a one proportion z test is H0: p ≥ 0.8, Ha: p < 0.8. This hypothesis test is?

As we gather a larger sample size the t-distribution gets?

A selection procedure that checks every possible combination of independent variables.

In linear regression, the variable that is being predicted or explained is known as the _____.

SSR=12 and SSE=6 what is the SST

A teacher is interested in how many students use a phone in class and finds 15 of 50 are. What is the point estimate?

The purpose of statistical inference is to make estimates or draw conclusions about a?

In interval estimation, as the sample size becomes smaller, the interval estimate _____.

What are the two decisions that you can make from performing a hypothesis test?

A variable used to model the effect of categorical IV in a regression model; generally takes only the value zero or one.

Making estimates and drawing conclusions about one or more characteristics of a population using sample data

A selection procedure that starts with all the variables in the model?

This residual plot indicates?

Analysis that develops an equation showing how two or more variables are related.

Prediction of the dependent variable outside of the experimental region is known as extrapolation.

A size n sample is drawn from a finite population N, where all samples of size n have equal selection probability.

A sample of tires shows the average tread depth was 8.5 mm A 95% confidence interval was 8≤u≤9. What does this mean?

Nonsampling error that results when some segments of the population are more or less likely to respond to the survey.

To answer a hypothesis for a lower tail test, the observed level of significance in our sample is?