would the following group of probabilites be valid or not valid 23%, 45%, 17%?
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A: A statistical hypothesis is an assumption or a statement about the population parameter. Hypothesis…
would the following group of probabilites be valid or not valid 23%, 45%, 17%?
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- A telephone operator firm has found that 20% of abanlarının over the years has passed to different firms. After a promotion attempt, 200 subscribers moved to 30 different companies. What is the test statistic for this event? Please select one: a. 0.125 b. 1.77 c. -1.77 d. None of them e. -1.25A conservative radio talk show host with a large audience is interested in the proportion p ofadults in his listening area who think the drinking age should be lowered to eighteen. To findthis out, he poses the following question to his listeners: “Do you think that the drinking ageshould be reduced to eighteen in light of the fact that eighteen year‐olds are eligible for militaryservice?” He asks listeners to phone in and vote “Yes” if they agree the drinking age should belowered and “No” if not. Of the 100 people who phoned in, 70 answered “Yes.” a. List one source of sampling bias (i.e. bias based on the people included in the sample). b. List another source of bias (sampling or non-sampling).A mayor running for re-election claims that during his term, average municipal taxes have fallen by $125. A conscientious statistician wants to test this claim. He surveys 37 of his neighbors and finds that their taxes decreased (in dollars) as follows: 121, 139, 121, 125, 118, 145, 141, 91, 127, 136, 144, 154, 131, 139, 139, 125, 108, 130, 125, 106, 137, 148, 154, 134, 137, 112, 96, 114, 114, 126, 133, 129, 94, 129, 148, 163, 121 The statistician assumes a population standard deviation of $19. Do you think the statistician should reject the mayor's claim? Why or why not? Step 1: State the hypothesis. ?v= Step 2: Determine the Features of the Distribution of Point Estimates Using the Central Limit Theorem. By the Central Limit Theorem, we know that the point estimates are [Select an answer with distribution mean and distribution standard deviation Step 3: Assuming the Claim is True, Find the Probability of Obtaining the Point Estimate. P? ✓ ? ♥ = P(? ? ♥
- Mr. CDE was tasted to do a CPM in preparation for the annual strategic planning of ABC Company. The resutls based on the total weighted score are as follows: ABC Comppany, Competitor A, Competitor B, and Competitor C garnered 3.20, 3.40, 3.00, and 3.15, respectively. Which of the following statements is correct? Competitor A is the most competitive and ABC Company is the least competitive Competitor B is the most competitive followed by ABC Company, Competitor B, and Competitor C Competitor C is the least competitive All Choices and correct All Choices are incorrectSuppose that, in the course of a regular check-up, a doctor discovers that the patient has a potentially cancerous lesion. Most lesions are benign (non-cancerous), say 99%. The doctor orders an x-ray just in case. In laboratory tests on malignant (cancerous) lesions, the x-ray returns positive (cancer-affirming) results 69.6% of the time and negative results 30.4% of the time. In laboratory tests on benign lesions, the x-ray returns positive results only 19.3% of the time and negative results 80.7% of the time. The patient’s x-ray comes back positive. What is the probability that the patient has cancer? Suppose that the doctor calculates the probability that the patient has cancer without regard to the base rate of cancer in the population. That is, the doctor uses Bayes’ rule but assumes that cancerous and non-cancerous lesions are equally likely. What mistaken conclusion will the doctor draw from the test? Explain why it is important in these situations to have hospital…1f) The GRP for the final Raptor game when they won the championship was 176 (or 1.76). If Ikea showed 2 commercials during the game, what % of that specific target audience in Ontario (males 18- 34) watched the game that night?
- Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet. How many randomly selected sales transactions must be surveyed to determine the percentage that transpired over the Internet? Assume that we want to be 99% confident that the sample percentage is within two percentage points of the true population percentage for all sales transactions. n = (Round up to the nearest integer.)A mayor running for re-election claims that during his term, average municipal taxes have fallen by $150. A conscientious statistician wants to test this claim. She surveys 45 of her neighbors and finds that their taxes decreased (in dollars) as follows: 149, 135, 147, 147, 160, 146, 165, 144, 142, 159, 138, 185, 143, 164, 143, 154, 163, 151, 171, 156, 133, 145, 180, 172, 166, 167, 149, 144, 154, 172, 138, 168, 179, 151, 131, 165, 114, 140, 162, 151, 136, 152, 157, 154, 136 The statistician assumes a population standard deviation of $13. Do you think the statistician should reject the mayor's claim? Why or why not? Step 1: State the hypothesis. ? Step 2: Determine the Features of the Distribution of Point Estimates Using the Central Limit Theorem. By the Central Limit Theorem, we know that the point estimates are [Select an answer distribution mean with and distribution standard deviation Step 3: Assuming the Claim is True, Find the Probability of Obtaining the Point Estimate. P? ✓ ? ✓…A programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 99% confident that his estimate is in error by no more than two percentage points question mark Complete parts (a) a) Assume that nothing is known about the percentage of computers with new operating systems.
