Researchers want to see if men have a higher blood pressure than women do. A study is planned in which the systolic blood pressures of 50 men and 50 women will be measured (in mm Hg). The appropriate alternative hypothesis about the means of the men and women is .  This is a test

A mind reading experiment is done in which a subject tries to correctly identify which of 4 cards the researcher has randomly picked, where each card is equally likely. This is repeated for 200 trials. The null hypothesis is that the subject is guessing at random, while the alternative is that the subject can read minds and can guess the card selected at a rate higher than guessing at random. The subject actually gets 70 correct answers. Which of the following describes the probability represented by the p-value for this test? The probability of getting 70 or correct, if the subject . 

A study was conducted to compare female and male college students based on the number of hours they spend watching television on weekends. Results are summarized below. Female group mean = 4.52Male group mean = 4.89Standard error for the difference the two sample means = 0.11 With the difference in population means defined as “Female minus Male” which of the following presents the correct test statistic?

You conduct an analysis comparing two online textbook stores on the prices they charge (in dollars) for new books. You sample 40 textbooks and obtain the price for each textbook at each online textbook store.  Below are the results. Sample mean of the paired differences = 8 Standard deviation of the paired differences = 15 Standard error for the mean of the paired differences = 2.37Which of the following is the correct test statistic for this analysis?

Does burning areas of an ecosystem improve the performance of native grasses? A team of ecologists tested this on 50 fields. Assume the researchers performed an experiment and calculated a p-value of 0.024.  Complete the statements below: Using a significance level of 0.05, the researchers should the null hypothesis. It is possible that they have committed a type error.

In a survey, students are asked how many hours they study in a typical week. A five-number summary of the responses is included.    Min Q1 Med Q3 Max 5 9 14 20 50   Use the information from this five-number summary to identify the quantities listed below.

Assume that SAT-math scores are normally distributed with mean 500 points and standard deviation 100 points. Taylor scored 650 on the SAT-math test.  Taylor’s standardized score (z-score) is ? 95% of the SAT-math scores would lie between

A randomly selected sample of n = 20 activity monitor/ tracker users completed a survey. These activity monitor/ tracker users indicated that they walked on average 8,000 steps per day with a standard deviation of 90 steps per day. The calculated standard error of the mean is 20.1 steps per day. Assume that all conditions are met to use the theoretical t distribution for inference.  Which is correct 98% confidence interval for the average number of steps walked per day by activity monitor/tracker users?

Consider the StatKey output below that provides a bootstrap distribution for the difference in proportions:   Use all provided information. The normal approximation of this bootstrap distribution is: N(

The table below shows the responses from a sample of 680 people in the General Social Survey to the question, “Do you sometimes drink more than you think you should?” The data is separated by sex.   No Yes Total Female 260 92 352 Male 177 151 328 Total 437 243 680 What is the correct calculation of the relative risk for females who said “yes” when compared to males?