What type of hypothesis test should be done?

The critical value in a hypothesis test   Multiple Choice   depends on the value of the test statistic.   is calculated from the sample data.   separates the acceptance and rejection regions.   usually is .05 or .01 in most statistical tests.

A news article that you read stated that 52% of voters prefer the Democratic candidate. You think that the actual percent is larger. 149 of the 266 voters that you surveyed said that they prefer the Democratic candidate. What can be concluded at the 0.05 level of significance? For this study, we should use Select an answer t-test for a population mean z-test for a population proportion  The null and alternative hypotheses would be:     Ho: ? p μ  Select an answer ≤ = < ≥ ≠ >   (please enter a decimal)    H1: ? p μ  Select an answer > ≥ ≤ = < ≠   (Please enter a decimal) The test statistic ? z t  =  (please show your answer to 3 decimal places.)

What is the null and alternative hypothesis for the following problem? Thank you

True or false: The P-value is the smallest significance level for which the observed sample data result in rejection of the null hypothesis.

2. When we carry out a 1-sample hypothesis test for the mean, one of the ways that we can check for normality is to look at the normal plot. How do we know if our normality assumption is satisfied by looking at the normal plot? Be as specific as possible.

Describe a study in which you can use both nonparametric and parametric statistics. A researcher has participants expecting to receive either painful or mild electrical shocks during a study wait in a quarter-full waiting room with other participants. He then measures whether they choose to sit next to other participants or if they sit far away on their own. What is the best test to run for this study and why?

Suppose an education administrator wants to know whether the test scores of a new standardized graduation exam are different for males and females. To test this hypothesis, the administrator decides to perform a ?‑test for two independent means. She takes a random sample of test scores from both male and female populations. Some of the summary data are shown in the table. Population PopulationDescription Samplesize Samplemean (pts) Sample standard deviation (pts) 1 Female ?1=21 ?⎯⎯⎯1=34.3 ?1=3.09 2 Male ?2=22 ?⎯⎯⎯2=34.7 ?2=3.82 The administrator assumes that the population variances are equal, so she computes a pooled ?‑test statistic. Determine the number of degrees of freedom, df, for the pooled ?‑statistic.