Show all steps/calculator commands using a ti84 graphing calculator. 1. Conduct a hypothesis test showing all of your steps. From a random sample of 89 customers using a certain bank, 13 said they were not happy with the services they received. That bank reports that less than 20% of its customers are unsatisfied with its services. Test this claim with an 8% level of significance. 1. State the hypotheses and label the claim. Is the test left-tailed, right-tailed, or two-tailed?   2. What is/are the critical value(s)? Draw a picture.    3.What is the P-value AND test-statistic? 4. State the conclusion. Give two reasons for your decision to reject/not reject H0 base

In a sample of 624 applicants to the Durmstrang Institute of Sorcery, 133 were accepted. Construct a 90% confidence interval for the true proportion of applicants to Durmstrang that are accepted. Does it appear that Durmstrang accepts 20% of their applicants?

A proponent of a new proposition on a ballot wants to know the population percentage of people who support the bill. Suppose a poll is​ taken, and 589 out of 1000 randomly selected people support the proposition. Should the proponent use a hypothesis test or a confidence interval to answer this​ question? Explain. If it is a hypothesis​ test, state the hypotheses and find the test​ statistic, p-value, and conclusion. Use a 5​% significance level. If a confidence interval is​ appropriate, find the approximate 90​% confidence interval. In both​ cases, assume that the necessary conditions have been met. Should the proponent use a hypothesis test or a confidence​ interval? (If both a hypothesis test and a confidence interval could be​ used, choose the simpler​ one.)   A. The proponent should use a confidence interval because the proponent wants to know the proportion of the population who will vote for the proposition. A hypothesis test would be impossible.   B. The proponent…

6.  A researcher takes a sample of people, and asks them how they would vote for president. When she creates her confidence interval, she has a standard error of .082. If she wanted to get a smaller standard error, what could she do? Group of answer choices Ask a different research question. Take a smaller sample. Take a larger sample. None of the above would create a smaller standard error.

A graduate Statistic Student wants to estimate the true proportion of county college ("c.c.") students in here state who go on to receive an Associate Degree (AD ), She is able to take a random sample of n = 100 of those c.c. stuents, and 64 of those students received an AD. Find her 90% confidence interval for the true proportion of c.c. students in her state that receive an AD. Be sure to either i)Use full calculator syntax including proper label on your output or i)write down the formula, plug in the appropriate nun bers, and then give the calculated interval including a proper label. 1-prop-Z Int x: 64,n: 100, Clevel.90, interval (.56105,.71895 b. 1-prop-Z Int x: 64,n: 100, Clevel .90, interval (.66105,.71896 1-prop-Z Int x: 64,n: 100, Clevel .90, interval (.51105,.70950 1-prop-Z Int x: 64,n: 100, Clevel .90, interval (.61105,.81105 by C.

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The dataset "nurses" is a random sample of 1,000 cases from “Health Care Provider Credential Data” from Washington State Open Data Portal. In the sample, there are 418 CNA's and 278 of the CNA's have expired credentials. Use the statistics from the nurses dataset to answer the following question: "With 90% confidence, what percent of all CNA's on Washington State's healthcare provider list are expired?"