Exam 8: Testing Hypotheses

A statement of "no difference" that contradicts the research hypothesis and is always expressed in terms of population parameters is called the

SELECT ALL THAT APPLY. -A research hypothesis

In a simple random sample of 120 women and 150 men from a population of 150,000,25% of the women and 37% of the men are smokers.Suppose you are interested in comparing the proportion of smokers by sex,compute the estimated standard error.

The probability associated with obtaining a particular value of Z is referred to as its

Suppose you are interested in testing whether the mean earning of men in the General Social Survey is representative of the earning of the entire U.S.male population.The average male in the General Social Survey earned $31,607 in 2005 and the average male in the population earned $33,405 in 2005.State the null and research hypotheses.

Which is the symbol for the standard error?

Which of the following illustrates an important difference between the Z and t statistics?

Which of the following is the null hypothesis for a two sample t test?

The degrees of freedom will increase as the sample size increases.

Calculate the degrees of freedom for a one-sample t test with 2,822 U.S.adults between the ages of 15 and 64 in the sample.

In a simple random sample of 120 women and 150 men from a population of 150,000,25% of the women and 37% of the men are smokers.Suppose you are interested in comparing the proportion of smokers by sex,do we accept or reject the null hypothesis of assuming the smoking proportions of women and men are the same with alpha .05?

A measure of how unusual or rare an obtained statistic is,is referred to as

When a one-tailed test specifies that the population mean is greater than some specified value,we call it a ______ test.

In calculating the standard error,the population standard deviation is estimated by

The research hypothesis is symbolized as

The probability at which the null hypothesis is rejected is referred to as

SELECT ALL THAT APPLY. -A p value

List the four quantities needed to conduct a single-sample t test.

A left-tailed test is one where the sample outcome is hypothesized to be

Imagine you wish to determine whether the mean number of hours worked per week by men in a sample differs from the 40-hour standard.Use the information below to calculate the number of degrees of freedom associated with a single-sample t test.