Which of the following statements is true about the null hypothesis?     Question 1 options:   It is a statement that directly contradicts the null hypothesis   Often includes a < or > sign or states that something is not equal   We determine whether or not to reject this statement based on the likelihood of the opposite hypothesis being true   It is a statement about the population parameter   Question 2 True or False?  A small p-value indicates strong evidence against the null hypothesis

If the calculated test statistic falls in the rejection region, the statistical action is to __________. reject the alternate hypothesis reject the null hypothesis reject both the hypotheses accept both the hypotheses

An article in a journal reports that 34% of American fathers take no responsibility for child care. A researcher claims that the figure is higher for fathers in the town of Littleton. A random sample of 225 fathers from Littleton, yielded 97 who did not help with child care. Using a .05 level of significance test the claim that the proportion is at least 34%.   State the null hypothesis H0: _____________ State the alternative hypothesis H1: _____________ What is the test statistic used for the test (z or t) and its value (round to 2 places) State the significance or alpha (α) level Determine the p-value. (round to 4 places) Do you or do you not reject the null hypothesis? Why? Write a clear conclusion using a complete sentence.

Select the appropriate null and alternative hypothesis for the following research question: People who see therapists have lower depression scores than people who do not see therapists? xbar1 = the average depression score for people who see a therapist xbar2 = the average depression score for people who do not see a therapist O Null Hypothesis: People who see a therapist have depression scores lower than or equal to people who do not see a therapist i.e. xbar1 xbar2 O Null Hypothesis: People who see a therapist have depression scores higher than or equal to people who do not see a therapist i.e. xbar1 >= xbar2 Alternative Hypothesis: People who see a therapist have depression scores lower than people who do not see a therapist i.e. xbar1 < xbar2

the parameter value for the null hypothesis is what?

For a hypothesis test, if the p-value for the test statistic is less than the significance level, which one of the following is a correct conclusion? Group of answer choices Reject the null hypothesis. There is enough evidence to conclude the alternative hypothesis is true. Fail to reject the null hypothesis. There is enough evidence to conclude the null hypothesis is true. Reject the null hypothesis. There is not enough evidence to conclude the alternative hypothesis is true. Fail to reject the null hypothesis. There is not enough evidence to conclude the alternative hypothesis is true.

A significance test is based on the following idea: Make an assumption about the population (The null hypothesis an assumption that the parameter equals a value). Then test to see if, under the assumption that the null hypothesis is true how likely is the sample that you got? If the sample you got is likely (within the range of normal defined by o or with probability greater then o) then it is possible that both the sample and the null hypothesis is true. If the sample is not likely then both it and the null hypothesis are probably not both true. Since the sample was collected (under the assumption it was collected well) then the null hypothesis is probably not true and we reject the null hypothesis. There are 3 types of significance tests. Left-sided test: Unusual defined by the test statistic being less than the critical value which cuts off or area in the left tail (note these will be negative values, less then means bigger negative) or a p-value less then a, where p-value is the…

H0:  =, >, <, or ≠ _______________ year (s).   H1:  =, >, <, or ≠ _________________ year (s).   Since the P-value is less than or equal to, or more than or equal to the significance level, reject or do not reject the null hypothesis. There is or is not sufficient evidence to support the claim that actress are generally younger when they won the award than actors.    Since the confidence interval contains only zero, positive number values, or only negative number values, reject or warrent rejection of the null hypothesis.

What does it mean when we reject the null hypothesis? What conclusion do we make, etc.? Explain in as much detail as you can

A researcher wants to know if there is a relationship between gender and the likelihood of being a psychology major. A sample of n=200 participants is surveyed and the observed results are presented in the table below.   Male Female Yes 20 70 No 80 30 Which of the following lists the appropriate hypotheses for this question and data? a. Ho (null): the variables are independent; H1 (alternative): the variables are not independent b. Ho (null): the variables are not independent; H1 (alternative): the variables are independent     A researcher wants to know if there is a relationship between gender and the likelihood of being a psychology major. A sample of n=200 participants is surveyed and the observed results are presented in the table below.   Male Female Yes 20 70 No 80 30 Which of the following lists the correct value of the test statistic and critical value? a. 7.98 (test statistic); 1.34 (critical value) b.…