Athletes at a certain university have a long term graduation rate of 0.60 or 60%. Researchers believe that this has changed over the past several years and take a random sample of 300 athletes from the university and find that 201 eventually graduated. Choose all the correct statements Group of answer choices a) p^=0.67 is the sample statistic b) p=0.67 is a parameter c) p^=.201 is the sample statistic

Athletes at a certain university have a long term graduation rate of 0.60 or 60%. Researchers believe that this has changed over the past several years and take a random sample of 300 athletes from the university and find that 201 eventually graduated. Choose all the correct statements Group of answer choices a) p^=0.67 is the sample statistic b) p=0.67 is a parameter c) p^=.201 is the sample statistic

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

One private bank claims that they employ an average of 25 staff members at their branches. It was observed that this bank had an average of 20 employees with 3 employees in 15 randomly selected branches. Test the claim that the staff working in the branches of the bank employs less than 25 people on average at 1% meaning level.
A SAMPLE OF EMPLOYEES IS SELECTED AND IT IS FOUND THAT 50% OWN COMPUTER. iS THIS A PARAMETER OF STATISTIC AND WHY?a SAMPLE OF SENIORS IS SELECTED AND IT IS FOUND THAT 50% OWN A CAR> iS THIS A STATISTIC OR PARAMETER AND WHY?
The Human Society of South Africa reports that there are approximately 77.5 million dogs owned in South Africa and that approximately 40% of all South African households own at least one dog. In a random sample of 300 households, 114 households said that they owned at least one dog. Suppose you must test the hypothesis at 5% level of significance that the data provide sufficient evidence to indicate that the proportion of households with at least one dog is different from that reported by the Human Society of South Africa. 1. Determine (I) the alternative hypothesis to be tested: (ii) the value of test statistic: (iii) the p-value for this problem and the conclusion.
In the past, 35% of the students at ABC University were in the Business College, 35% of the students were in the Liberal Arts College, and 30% of the students were in the Education College. To see whether or not the proportions have changed, a sample of 300 students from the university was taken. Ninety of the sample students are in the Business College, 120 are in the Liberal Arts College, and 90 are in the Education College. the hypothesis is to be tested at the 5% level of significance. The critical value from the table equals____
Let us hypothesize that cats spend more time sleeping in Winter than in Summer. Let us also presume that in Summer, cats sleep an average of 15 hours per day and we will be observing the sleep patterns of cats during Winter for comparison. Using the notation from the textbook, identify the four possible hypotheses. Then, in your own words, describe each of those hypotheses within the context of this cat-sleep study.
A university asked its applicants to write a short essay for its entrance test. Based on their gathered data, itwas found out that two out 10 students did not make grammatical mistakes, three out of 10 students made agrammatical mistake, four out of 10 students made two mistakes, and one out of 10 made three grammaticalmistakes. What is the average number of grammatical mistakes made by the students in the essay?
A 25-year old study of randomly selected 6000 adults from the United Kingdom noted four bad habits: 1)Smoking, 2) Drinking, 3) Lack of Exercise and 4) Poor Diet. The study looked to show that there is a higher death rate (proportion who die in the 25-year period) among people with all four bad habits than amongst people with none of the bad habits. a) Was this an experiment or observational study. Explain. b) State the Null and Alternative hypotheses. c) What would be the result of a TYPE I ERROR. d) What would be the result of a TYPE II ERROR. Out of the 6000 people, 314 had all four bad habits and 91 died during the study. While 387 people had none of the bad habits, 32 died during the course of the study. Does this provide sufficient evidence that there are different mortality rate between the two groups? e) Calculate and interpret the test statistic and p-value in context of this study. Be sure to check all necessary conditions and name your test.
A statistician selects a sample of 20 participants and makes the decision to retain thenull hypothesis. He conducts the same study testing the same hypothesis with asample of 100 participants and makes the decision to reject the null hypothesis. What likely explanation for why the two samples led to different decisions?
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2841occupants not wearing seat belts, 32 were killed. Among 7609 occupants wearing seat belts, 19 were killed. Use a 0.05significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) through (c) below. a. Test the claim using a hypothesis test. Consider the first sample to be the sample of occupants not wearing seat belts and the second sample to be the sample of occupants wearing seat belts. What are the null and alternative hypotheses for the hypothesis test? A. Identify the test statistic. z=_____ (Round to two decimal places as needed.) B. Identify the p-value. P= ____. (Round to three decimal places as needed). C. What is the conclusion based on the hypothesis test? P-value greater/less than significance level, so reject/fail to reject null hypothesis. There is/is not sufficient evidence to support claim. D.…
A random sample of 100 students at a high school was asked whether they would ask their father or mother for help with a financial problem. A second sample of 100 different students was asked the same question regarding a dating problem. If 43 students in the first sample and 47 students in the second sample replied that they turned to their mother rather than their father for help, test the hypothesis of no difference in the proportions. Use α = 0.02. Identify the final conclusion that addresses the original claim.
Is there a difference between community college statistics students and university statistics students in what technology they use on their homework? Of the randomly selected community college students 55 used a computer, 88 used a calculator with built in statistics functions, and 20 used a table from the textbook. Of the randomly selected university students 47 used a computer, 85 used a calculator with built in statistics functions, and 36 used a table from the textbook. Conduct the appropriate hypothesis test using an αα = 0.10 level of significance. What is the correct statistical test to use? Goodness-of-Fit Paired t-test Homogeneity Independence What are the null and alternative hypotheses?H0:H0: Type of student and type of technology used for statistics homework are dependent. The distribution of the technology that community college statistics students use for their homework is the same as the distribution of the technology that university statistics students use for…
A psychologist is interested in constructing a 90% confidence interval for the proportion of people who accept the theory that a person's spirit is no more than the complicated network of neurons in the brain. 57 of the 741 randomly selected people who were surveyed agreed with this theory. a. With 90% confidence the proportion of all people who accept the theory that a person's spirit is no more than the complicated network of neurons in the brain is between _____ and _____. b. If many groups of 741 randomly selected people are surveyed, then a different confidence interval would be produced from each group. About _____ percent of these confidence intervals will contain the true population proportion of all people who accept the theory that a person's spirit is no more than the complicated network of neurons in the brain and about _____ percent will not contain the true population proportion.