10 university students volunteered to participate in a study investigating the effect alcohol has on reaction time. Each student performed a reaction test. They then consumed 2 standard alcholic drinks. 20 mins after consumption they performed the same reaction test.The results from this study are going to be used to do a t-test of differences.Use the drop-down menus to identify if the following conditions for this test are satisfied or not.Paired data. AnswerThe sample is representative of the population. AnswerThe sampling distribution is normal.

College Students and Drinking Habits: A public health official is studying differences in drinking habits among students at two different universities. They collect a random sample of students independently from each of the two universities and ask each student how many alcoholic drinks they consumed in the previous week.The official conducts a two-sample t-test to determine whether these data provide significant evidence that students at University 1 drink more than students at University 2. The test statistic is t = 2.64 with a p-value 0.005.Which of the following is an appropriate conclusion? The samples provide significant evidence that students at University 1 drink more than students at University 2. The samples do not provide statistically significant evidence that there is a difference in drinking habits at the two universities. We cannot use the t-test in this case because the variables (number of drinks) are likely skewed to the right at each university.

To determine if alcohol consumption impacts students’ cognitive performance, ten students partake in an experiment on three consecutive Saturdays, with their time in seconds to solve a puzzle (time) recorded after a number of alcoholic drinks (drinks). The file Part1_Dataset7 displays the time to complete the same puzzle for the randomly assigned drink options: no alcohol on one of the Saturdays (zero standard drinks, coded 1), one standard drink of alcohol on another Saturday (coded 2), and five standard drinks of alcohol on another (coded 3). Hint. The variable “student” is the blocking variable. Based on the information given, answer the following questions. (a) At the 5% level of significance, is blocking effective? Follow all the necessary steps to perform the test and verify your results using Excel/PHStat. student drinks time 1 1 156 2 1 166 3 1 148 4 1 160 5 1 139 6 1 151 7 1 158 8 1 167 9 1 142 10 1 219 1 2 160 2 2 165 3 2 184 4 2 192 5 2 197 6 2 172 7 2 189 8 2 179 9 2 200 10 2 193 1 3 236 2 3 238 3 3 257 4 3 242 5 3 282 6 3 253 7 3 270 8 3 256 9 3 267 10 3 259

A group of 75 college students from a certain liberal arts college were randomly sampled and asked about the number of alcoholic drinks they have in a typical week. The file containing the data is linked below. The purpose of this study was to compare the drinking habits of the students at the college to the drinking habits of college students in general. In particular, the dean of students, who initiated this study, would like to check whether the mean number of alcoholic drinks that students at his college have in a typical week differs from the mean of U.S. college students in general, which is estimated to be 4.73.Let μ be the mean number of alcoholic beverages that students in the college drink in a typical week. State the hypotheses that are being tested in this problem.

The drinks manufacturer wants to advertise the effect of the drink on reaction time.The manufacture needs to confirm the effect on reaction time by improving theinvestigation.Give two improvements the manufacturer would need to make to this investigation

In a hypothetical study, a pharmaceutical company is interested in finding the dosage of a new medication that best treats panic attacks. Ninety people, who are diagnosed with panic attacks, were randomly assigned to three groups: (1) 20 milligrams of the new drug, (2) 30 milligrams of the new drug, and (3) 40 milligrams of the new drug.After 30 days on the medication, each participant records the number of panic attacks they have experienced in the previous seven days.What hypothesis testing technique should the researcher use to analyze the data? Paired t-test Two-sample t-test z-test for the population mean ANOVA