Many businesses and organizations insist that official communications use professional-looking fonts, such as Times New Roman. Fonts characterized as less Which method describes an experiment? O Method A is an experiment because the students choose their own font. professional, such as Comic Sans, should be avoided. A student would like to determine if font choice makes a difference in the average grade on a typed response in English classes. There are currently four English Method B is an experiment because the students are randomly assigned a font. Both methods describe experiments because both fonts are used on the assignment. classes available from which the student can collect data, and each class has a similar writing assignment. The student considers two methods for collecting data. Neither method describes an experiment because a third font should be included for comparison. Method A: At the start of the assignment, students choose a font, either Times New Roman or Comic Sans, and then complete the assignment. Method B: At the start of the assignment, students are randomly assigned one of two fonts, either Times New Roman or Comic Sans, and then complete the assignment.

Two different blood pressure medicines are being compared to determine if the average reduction in blood pressure is the same for each medication. The goal of the study is to determine if the medications differ. Twenty men age 50-60 years old are selected for the study. Ten men are chosen at random to receive the first medication and the other 10 men receive the second medication. Each of the 20 men is monitored for one month to determine the change in blood pressure over that time. Minitab provides the 95% confidence interval for (mu1 - mu2) (2.63, 14.18) a. Interpret this 95% CI. b. What assumptions (be specific) are necessary to construct this CI?

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Work this problem involving a true/false and multiple choice test. Assume that the test has 7 true/false questions, and 11 muiltiple choice questions (3 options per questions), each with exactly one correct answer. If a student guesses randomly on each question, what is her expected score?

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When taking a 6 question multiple choice test, where each question has 5 possible answers, it would be unusual to get ____ or more questions correct by guessing alone.Give your answer in the box above as a whole number.

Maddie conducts a study to see if listening to music helps students learn math.  She surveys a random sample of 250 college sophomores who completed a math class within the past six months.  She asks them to indicate how frequently they listened to music while studying math.  The students also report their final grade in the math class at the end of the semester.   Select the statement below that is false.     There is no placebo in this study.     Maddie conducted an observational study.     A confounding variable could be how often the participants studied math.     The population Maddie studied was 250 college sophomores.

In a series of studies, Sebastian Deri and his colleagues (2017) asked multiple groups about the number of friend groups they had and how often they attended different social events. They then asked participants how they thought their own numbers compared to other people's: Did participants see themselves as less social, the same as, or more social than others? In the first study, the researchers reported that: "Three hundred four participants from Amazon's Mechanical Turk (150 women; Mage = 37.1; 78% White, 10% Black, and 6% Asian) completed a survey in exchange for modest payment" (p. 860). What do the researchers mean by "Amazon's Mechanical Turk" with respect to their sample of participants? O A. An archival data set that already exists and from which researchers can use data O B. An online tool that researchers can use to recruit people to participate in research in exchange for a small payment O C. An e-book sold by Amazon that includes contact information for possible…

When taking a 18-question multiple-choice test, where each question has 4 possible answers, it would be unusual to get ______ or more questions correct by guessing alone.