SafariFileEditViewHistoryBookmarksWindowHelpWed 7:51myopenmath.comIn a simple random sample of 24 companies, 18 have both Twitter and Facebook accounts. Can we concludethat more than 70% of companies have both Twitter and Facebook accounts?What is the alternative hypothesis?p > 0.75Оp> 0.7Op 2 0.75Ор> 0.75Op > 0.7Op > 0.75Op > 0.7Op > 0.7Choose the correct probability statment for the- value.0.7 – 0.75O PZ >0.75 0.25240.75 – 0.7O PZ >0.7.0.3240.75 – 0.7O P Z >0.75 · 0.25240.7 – 0.75OP Z >0.7.0.324State your decision given a p –- value of 0.13 using a reasonable significance level.Reject HoO Accept HoFail to reject Ho00

The provided information is: Population proportion (p) = 0.7 Number of trials (n) = 24 Number of…

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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We sample 100 tickets from a box with replacement and compute the sample sum. The sample sum with probability 10% is smaller than 25 and with probability 90% is smaller than 85. What is the approximate standard deviation (SD)of the tickets in the box?
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In simple random sampling, it is true that each member of the population is equally likely to be selected, the chance for each member being equal to the sample size divided by the population size. Complete parts (a) and (b) below. Question content area bottom Part 1 a. Under what circumstances is that fact also true for systematic random sampling? Explain your answer.
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One cable company claims that it has excellent customer service. In fact, the company advertises that a technician will arrive within 35 minutes after a service call is placed. One frustrated customer believes this is not accurate, claiming that it takes over 35 minutes for the cable technician to arrive. The customer asks a simple random sample of 4 other cable customers how long it has taken for the cable technician to arrive when they have called for one. The sample mean for this group is 39.l minutes with a standard deviation of 2.6 minutes. Assume that the population distribution is approximately normal. Test the customer's claim at the 0.10 level of significance. Step 3 of 3: Draw a conclusion and interpret the decision.
About 6% of the population has a particular genetic mutation. 700 people are randomly selected. Find the standard deviation for the number of people with the genetic mutation in such groups of 700.
What does brand loyalty mean to consumers? According to a recent research report, 38% of consumers associate trust with brand loyalty. Complete parts (a) through (e) below. To conduct a follow-up study that would provide 99% confidence that the point estimate is correct to within ±0.04 of the population proportion, how many people need to be sampled? A sample size of __ consumers is needed.
olve this ! A FT N K Since an instant replay system for tennis was introduced at a major tournament, men challenged 1412 referee calls, with the result that 411 of the calls were overturned. Women challenged 764 referee calls, and 227 of the calls were overturned. Use a 0.01 significance level to test the claim that men and women have equal success in challenging calls. Complete parts (a) through (c) below. @ Consider the first sample to be the sample of male tennis players who challenged referee calls and the second sample to be the sample of female tennis players who challenged referee calls. What are the null and alternative hypotheses for the hypothesis test? 2 OA H₂: Py ZP₂ H₁: P₁ *P₂ OD. Ho: Py SP₂ H₂: Py #P₂ Identify the test statistic. z = -0.30 (Round to two decimal places as needed.) Identify the P-value. View an example Get more help. ** F2 S W P-value 0.764 (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test? command X # The…
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