In one statistics class, students were given one homework assignment. The professor asked students to find an example of a multinomial population and then to develop a hypothesis test. One student found an example – He selected four classes in fall 2010: Management, Accounting, Finance, and Economics. He computed the proportion of students who received an A grade for each class in fall 2010. The proportion of students who received an A grade in Management (M), Accounting (A), Finance (F), and Economics (E) is 0.45, 0.25, 0.3, and 0.2, respectively. In fall 2011, a new hired Economics professor teaches Economics. The student wants to study whether or not the new Economics professor will affect the proportion of students who will receive an A grade in these four classes in fall 2011. The enrollments of these four classes are 54, 48, 52, and 64, respectively. Therefore, this student formulates the null hypothesis: P(M) = 0.45, P(A) = 0.25, P(F) = 0.3, and P(E) = 0.2; while the alternative hypothesis is: The population proportion are not P(M) = 0.45, P(A) = 0.25, P(F) = 0.3, and P(E) = 0.2. Do this student’s example and hypothesis test make any sense? If yes, explain why you think so; if no, explain why not. Discuss and explain your reasons. You must provide your statistical analysis and reasons.
Do this student’s example and hypothesis test make any sense?
No it not make any sense
Economics professor will affect the proportion of students only for economics and we have to test the proportion for economics only to check the hypothesis.
In one statistics class, students were given one homework assignment. The professor asked students to find...
A student was asked to find a 98% confidence interval for the proportion of students who take notes using data from a random sample of size n = 89. Which of the following is a correct interpretation of the interval 0.12 < p < 0.3? Check all that are correct There is a 98% chance that the proportion of notetakers in a sample of 89 students will be between 0.12 and 0.3. The proprtion of all students who take notes...
One Management professor adopted a crossword puzzle exercise in his introductory management information systems (MIS) class, because he believes that the most important effects of engaging in a crossword exercise is the great workout it gives one’s brain—solving crossword puzzles requires several skills, such as spelling, reasoning, making inferences, evaluating choices, and drawing conclusions. That is, the exercise may enhance one’s ability to memorize words. He wants to know whether or not the crossword puzzle exercise can accelerate the learning...
Will rate!! A professor has noticed that students that attend class regutarly, miss no more than two classes per term, generally get better grades. For the class, the overall percent of students who attend regularly is 78%. Of those who come to dass on a regular basis、39% receive A, Of those who don't attend regulaty, orly 10% get A's. Draw a tree diagram like the one in the image, where RTatteeds class regularty attend class regularly, A earned an A",...
For the final project of an analytical chemistry laboratory course, the students were asked to quantify the lead (Pb2+) content in a drinking water sample. To receive a passing grade for the project, the students must produce a result (Pb2 concentration) that agrees with the result obtained by the course professor, who was using the same method, at the 95% confidence level. The mean (x), standard deviation (Sy) and number of replicate measurements (n) are shown below for the data...
1. A mathematics professor believes that the performance of students taking an elementary calculus course has declined in recent years. The professor decides to reuse a final exam that was first administered 10 years ago. At that time the mean score was 81 with s=10, for the 50 students in the section taught by that professor When given to the current class of 53 students, who observed essentially the same set of lectures, the mean is 75 with s=15. If...
The following table indicates the number of students enrolled in the beginning biology class, and of those, the number who receive a grade of D, F, or W. The department chairperson wants to advise the an of how many students are expected to receive DFW grades of 2019's anticipated enrollment of 530 students. The chairperson chooses to evaluate an exponential smoothing forecast (a 0.25) with a 3- period weighted moving average (0.45, 0.35, 0.2). All forecasts should be reported to...
Hypothesis Test. Students in a statistics class were asked, "With whom do you find it easier to make friends?" The options were "Same Sex," Opposite Sex," and "No Difference." Do females find it easier to make friends with the opposite sex than males do? Test at the 05 level. Of 68 recently surveyed males, 15 answered "Opposite Sex Of 137 females, 58 answered Opposite Sex." Question: What is the correct statistical procedure? 1-proportion z test 1-proportion z-interval 2.proportion z test...
1) A statistics teacher claims that, on average, 20% of students in his class get an A, 25% get a B, 35% get a C, 10% get a D and the rest get an F. The grades of a random sample of his students over the years is recorded. Test the claim at 10% significance. Round to the fourth as needed. Categories Observed Frequency Expected Frequency A 56 B 40 C 105 D 16 F 16 Test Statistic: Degrees of...
Economics- Probability and stats 1. Find the value of the 75th percentile of the following array: 5,10,43,9,8,6,2,5 A) 8 B) 9 C) 9.5 D) 8.5 2. Two independent events, A and B, where the P(B) is 0.44 and the probability that A does not occur or B occurs is 0.74. What is the probability that event A occurs? A) 0.3 B) 0.54 C) 0.46 D) 0.28 3. Which of the following is FALSE? A) B) A sampling distribution is a...
SOC364/L - Social Statistics @ CSUN w Godard Homework #5: Confidence intervals & Samples Sizes This assignment need not be typed but must be legible. (The instructor is the arbiter of legibility.) Be as complete as possible in your answers. On this and all assignments, put all answers in prose form (sentences and paragraphs); single-word or phrase answers are not sufficient. Be explicit and complete in explaining your answers. Show all work done, including any calculations, & explain all of...