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- The table given below contains information about different students from the same school. In this question, you are asked to normalize the data given until the 3rd normal. You may work in excel and copy paste your answer
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- A recent survey conducted by Gallup (an analytic and advice firm) estimated that 50% of students in Massachusetts prefer learning full-time in person, while the remaining 50% prefer a full-time remote or a hybrid arrangement. Suppose we assume that, among USC students, the proportion of those who prefer learning full-time in person instruction is the same as that estimated by Gallup for Massachusetts. We interview a random sample of 70 USC students regarding their preferences over full-time in person versus remote/hybrid instruction. c) Under our assumption that the preferences of USC students are the same as those estimated by Gallup for Massachusetts, using the approximation based on the Normal distribution, what is the sampling distribution of the proportion of interviewed students who prefer full-time in person instruction? d) Under our assumption that the preferences of UCI students are the same as those estimated by Gallup for Massachusetts, using the approximation based on…A corporation randomly selects 150 salespeople and finds that 66% who have never taken a self-improvement course would like such a course. The firm did a similar study 10 years ago in which 60% of a random sample of 160 salespeople wanted a self-improvement course. The groups are assumed to be independent random samples. Let π1 and π2 represent the true proportion of workers who would like to attend a self-improvement course in the recent study and the past study, respectively. What is/are the critical value(s) when performing a Z test on whether population proportions are different if α=0.05? Round to three decimal places. A. −1.960 B. ±1.960 C. ±1.645 D. ±2.080According to the February 2008 Federal Trade Commission report on consumerfraud and identity theft, 23% of all complaints in 2007 were for identity theft. Inthat year, Arkansas had 1,601 complaints of identity theft out of 3,482 consumercomplaints ("Consumer fraud and," 2008). Does this data provide enoughevidence to show that Arkansas had a higher proportion of identity theft than23%? Test at the 5% level.
- A recent survey conducted by Gallup (an analytic and advice firm) estimated that 50% of students in Massachusetts prefer learning full-time in person, while the remaining 50% prefer a full-time remote or a hybrid arrangement. Suppose we assume that, among UCI students, the proportion of those who prefer learning full-time in person instruction is the same as that estimated by Gallup for Massachusetts. We interview a random sample of 70 USC students regarding their preferences over full-time in person versus remote/hybrid instruction. a. Under our assumption that the preferences of USC students are the same as those estimated by Gallup for Massachusetts, what is the exact distribution of the number of interviewed students who prefer full-time in person instruction over remote/hybrid arrangements? b. Under our assumption that the preferences of UCI students are the same as those estimated by Gallup for Massachusetts, what is the exact probability that the number of interviewed students…A school district started using a new criteria for selecting which students entered their "accelerated" math track, starting in 6th grade. The study found that under the new criteria about 75% of the students in the district were eligible for accelerated math in 6th grade, but that from one year to the next only about 2/3 of the students stayed in the accelerated track. a) Assuming that everyone who is eligible enrolls the first year, make a TABLE that shows the percent of the students in the district that would be expected to be enrolled in the accelerated track each year from 6th grade until 10th grade. Please show the work you used to fill in your table. b) Considering that from one year to the next about 2/3 of the students stay in the accelerated track, is there a grade level in which you'd expect about 1/10 as many students in the accelerated track as there were in 6th grade? Does the number of students in the accelerated track in 6th grade affect your answer? Please show your…Anita's, a fast-food chain specializing in hot dogs and garlic fries, tracks the proportion of its customers who eat in the restaurant rather than ordering food "to go" so that it can make decisions about the potential construction of in-store play areas, the attendance of its mascot Sammy at franchise locations, and so on. According to Anita's, 52% of their customers purchase food to go. Assume that this proportion is true and a random sample of 40 consumers is collected. (a) Estimate the number of customers in the sample who order their food to go by giving the mean of the relevant distribution (that is, the expectation of the relevant random variable). Do not round your response. (b) Quantify the uncertainty of your estimate by giving the standard deviation of the distribution. Round your response to at least three decimal places.
- A researcher wishes to assess the possibility that a certain type of psychotherapy actually reduces neurotic symptoms. A random sample of subjects is selected from the population of names on a waiting list at a mental health clinic. For each subject selected, another subject is so, also from the waiting list, who resembles the original deselect exception in a number of important respects, such as age, length of time on the waiting list, IQ, severity of symptoms, length of symptoms duration, category of neurosis, and previous treatment history. By a flip of a coin, one group is chosen to receive six months of intensive Psychotherapy, while the other group is told to continued waiting and not to seek treatment elsewhere. At the end of the six-month period, a panel of expert judges all the subjects with respect to the extent of symptomatology. What type of research is this, experimental or post facto? What is the IV and what is the DV? What would you advise the researcher to do with…An organization published an article stating that in any one-year period, approximately 7.5 percent of adults in a country suffer from depression or a depressive illness. Suppose that in a survey of 100 people in a certain town, six of them suffered from depression or a depressive illness. Conduct a hypothesis test to determine if the true proportion of people in that town suffering from depression or a depressive illness is lower than the percent in the general adult population in the country.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.
- Two popular drugs used for the treatment of depression are Resithan and Exemor. A random sample of 590 depressed individuals is selected and treated with Resithan, and 203 find relief from their depression. A random sample of 481 depressed individuals is independently selected from the first sample and treated with Exemor, and 179 find relief from their depression. Can we conclude, at the 0.05 level of significance, that the proportion p1 of depressed individuals taking Resithan who find relief from depression is less than the proportion p2 of all depressed individuals taking Exemor who find relief from depression? Perform a one-tailed test. The null hypothesis: H0: The alternative hypothesis: H1: The type of test statistic: (Choose one)ZtChi squareF The value of the test statistic:(Round to at least three decimal places.) The critical value at the 0.05 level of significance:(Round to at least three…A Deputy Registrar at a certainty university conducted a Chi-Square test of association to establish whether or not employee grade and level of absenteeism were associated. Table 2 below shows part of the results which were obtained. Table 2: Cross tabulation of employee grade and level of absenteeism Contingency Tables Grade LAbsence 1 2 3 Total low Observed 8 1 0 9 Expected 2.90 3.48 2.61 9.00 high Observed 2 11 9 22 Expected 7.10 8.52 6.39 22.00 Total Observed 10 12 9 31 Expected 10.00 12.00 9.00 31.00 2.1 State the appropriate measurement scales for the variables. 2.2 State the null and alternative hypotheses. 2.3 Calculate the expected frequency corresponding to a Grade 3 academic with a high level of absenteeism. 2.4 Find the Chi-Square critical value and test statistic.…A Deputy Registrar at a certainty university conducted a Chi-Square test of association to establish whether or not employee grade and level of absenteeism were associated. Table 2 below shows part of the results which were obtained. Table 2: Cross tabulation of employee grade and level of absenteeism Contingency Tables Grade LAbsence 1 2 3 Total low Observed 8 1 0 9 Expected 2.90 3.48 2.61 9.00 high Observed 2 11 9 22 Expected 7.10 8.52 6.39 22.00 Total Observed 10 12 9 31 Expected 10.00 12.00 9.00 31.00 2.2 State the null and alternative hypotheses.