4. Two new mathematics learning techniques are being tested. Twenty students were randomly select...
4. Two new mathematics learning techniques are being tested. Twenty students were randomly selected from a population. nA 9 of them were randomly assigned to use technique A, and nB 11 of them were randomly assigned to use technique B. Each student spent 30 minutes learning the technique to which they were assigned, and then were asked to complete a task. The time to complete the task was recorded, in seconds. A shorter time indicates better mastery of the task....
n a study conducted by some Statistics? students, 57 people were randomly assigned to listen to rap? music, music by? Mozart, or no music while attempting to memorize objects pictured on a page. They were then asked to list all the objects they could remember. The summary statistics for each group are shown in the table. Complete parts a and b. Rap Mozart No Music Count 32 15 10 Mean 12.62 8.91 14.88 SD 3.52 2.91 4.23 a) Does it...
Twenty undergraduate students were given t Dependent Samples t-test Badate students were given two versions of a Sitem test. Half of the 20 weerst given the multiple choice version of the test They were then given the same test questions presented in open-ended form s presented in open-ended form (without choices). The other half were given open-ended form of the test first followed by the multiple-choice version. The data Ociow list the number of correct answers on each test for...
0. A group of statistics students wanted to investigate the effect of social media on a person's self- esteem. For this purpose, they conducted a study where participants were randomly assigned to one of three groups: browsing ENews for 2 minutes and then taking a survey, browsing Facebook for 2 minutes and then taking a survey, or a control group where the participants just took the survey. The survey, based on the Rosenberg self-esteem scale, was the tool used to...
Can moving their hands help children learn math? This question was investigated in a study. Eighty-five children in the third and fourth grades who did not answer any questions correctly on a test with six problems of the form 3 + 2 + 8 = ___ + 8 were participants in an experiment. The children were randomly assigned to either a no-gesture group or a gesture group. All the children were given a lesson on how to solve problems of...
Researchers studied the effects of learning about the effectiveness of a new medication (Tal & Wansink, 2014). Some participants heard information about the medication; others heard the same information and saw a graph that depicted the data they had heard about. Thus, the two groups had identical information. Participants rated the effectiveness of the medication on a scale of 1-9, with 9 indicating a higher level of effectiveness. The researchers reported "Participants given graphs expressed greater belief in the claims,...
MAT 107 Project: Age of Students in College Professor Sumner Collect Data: (5 points) You will need to ask 30 college students their age. The students can attend any college or university. Use the table below to input the data you collected. If you do the work for this project by hand, you must show the work you do to arrive at your results to earn full credit. If you use technology (computer, calculator, etc.) to obtain the results, you...
An experiment on memory was performed, in which 16 subjects were randomly assigned to one of two groups, called "Sentences" or "Intentional". Each subject was given a list of 50 words. Subjects in the "Sentences" group were told to form multiple sentences, each using at least two words from the list, and to keep forming sentences until all the words were used at least once. Subjects in the "Intentional" group were told to spend five minutes memorizing as many of...
1. Three different metal alloys were tested for tensile strength. The strength of some examples of each alloy measured (in hundreds of megapascals), as follows. was Alloy Tensile strength of some examples 19.8 12.4 1 15.2 14.8 2 8.9 11.6 10.0 11.9 3 10.5 13.8 12.1 Source: the data come from Berenson and Levine (1998), Business Statistics: A First Course, p. 449, Question 10.27, but shortened.) Taking the types of alloy one-way ANOVA. The following R commands were used: as...
In Data 4.1 on page 258, we examine a study in which mice were randomly assigned to either a normal light/dark cycle or to have a light on around the clock. According to the paper describing that study, "The global increase in the prevalence of obesity and metabolic disorders coincides with the increase of exposure to light at night." The study is examining whether light at night plays a causal role in the obesity epidemic. In Data 4.1, we examine...