Find the margin of error for the given values of c, σ, and n. c=0.95, o = 2.2, n=81 Click the icon to view a table of common critical values. E = (Round to three decimal places as needed.) Table of Common Critical Values Level of Confidence 90% 95% 99% Print Zc 1.645 1.96 2.575 Done - X
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- Use the expression in the accompanying discussion of sample size to find the size of each sample if you want to estimate the difference between proportions of men and women who own smartphones. Assume that you want 95% confidence that your error is no more than 0.02. A Click the icon to view the discussion of sample size. The sample should include men and women. (Type whole numbers.) Sample size discussion The sample size needed to estimate the difference between two population proportions to within a margin of error E with a confidence level of 1-a can be found by using the following expression: P191 P292 E=Za/2 n1 n2 Replace n, and n2 by n in the preceding formula (assuming that both samples have the same size) and replace each of p,, 9,, P2, and q2 by 0.5 (because their values are not known). Solving for n results in this expression: a/2 n = 2E? Print DoneK The data found below measure the amounts of greenhouse gas emissions from three types of vehicles. The measurements are in tons per year, expressed as CO2 equivalents. Use a 0.05 significance level to test the claim that the different types of vehicle have the same mean amount of greenhouse gas emissions. Based on the results, does the type of vehicle appear to affect the amount of greenhouse gas emissions? Click the icon to view the data. O search F4 OA. Ho: H₁ H₂ H3 H₁ H₁ H₂ H3 OB. Ho H₁ H₂=13 H₁: At least one of the means is different from the others. OC. Ho: 1₁ =1₂2=43 H₁ H₁ H₂ H3 OD. Ho: At least one of the means is different from the others. H₁: Hy=4₂=13 Determine the test statistic. F= (Round to two decimal places as needed.) Identify the P-value. P-value = (Round to two decimal places as needed.) What is the conclusion of the test? F5 the null hypothesis. Conclude that the type of vehicle O F6 II F7 F8 1 F9 X *( acer F10 Data Table F11 Type A 6.3 6.9 F12 6.6 6.2 6.7 7.1 7.8…A student who took Stat 2 last semester learns that their overall course score was at the 85th percentile. Assuming that a histogram of all the Stat 2 course scores from last semester follows the normal curve, this means that this student had a score that was how many SDs above the average score? Choose the answer that is closest. Group of answer choices 1.15 1.05 1.10 1.0 PreviousNext
- Find the margin of error for the given values of c, o, and n. c= 0.90, o = 3.4, n= 36 Click the icon to view a table of common critical values. E = (Round to three decimal places as needed.)What's the t= ? And the p-value?Assume that a sample is used to estimate a population proportion p. Find the margin of error E that corresponds to the given statistics and confidence level. Round the margin of error to four decimal places.95% confidence; n = 380, x = 50 Group of answer choices 0.0408 0.0306 0.0340 0.0357
- A new vaccination is being used in a laboratory experiment to investigate whether it is effective. There are 279 subjects in the study. Is there sufficient evidence to determine if vaccination and disease status are related? Vaccination Status Vaccinated Not Vaccinated Total Diseased Not Diseased Total 54 87 71 192 125 279 33 121 154 Step 4 of 8: Find the value of the test statistic. Round your answer to three decimal places. Copy DataA May 2011 Gallup Poll found that many Americans believe in ghosts and other supernatural phenomena. The poll was based on telephone responses from randomly selected adults. The table shows the number of people who expressed belief in various phenomena. Please finish the relative frequency table below, and please show your answers in decimals 2 decimal places. Phenomenon Frequency Relative Frequency Psychic Healing 207 ESP 379 Ghosts 103 Astrology 431 Channeling 603Please do not give solution in image format thanku
- A new vaccination is being used in a laboratory experiment to investigate whether it is effective. There are 258 subjects in the study. Is there sufficient evidence to determine if vaccination and disease status are related? Vaccination Status Diseased Not Diseased Total Vaccinated 55 62 117 Not Vaccinated 70 71 141 Total 125 133 258 Copy Data Step 4 of 8: Find the value of the test statistic. Round your answer to three decimal places.ed in in the table 2. Find the mean, median, and mode for the following sample of scores: one person the sample 12. A sample One persoi 5 4 5 2 7 1 3 5 ust use the s found stribution nidpoint of students edian, you ates the highest quency. epresen-your car is more crowded than you think. table 5.8 reports results from a 1969 personal transportation survey on "home-to-work" trips in metropolitan areas. The survey stated that the average car occupancy was 1.4 people. check that calculation.
