) It is known that 35% of individuals in a community of N people regularly use bicycles. Find the standard error of the ratio for n=40 randomly selected "returned" people. A) 0.075
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Q36 -)) It is known that 35% of individuals in a community of N people regularly use bicycles. Find the standard error of the ratio for n=40 randomly selected "returned" people. A) 0.0753 B) 0.0215 C) 00.52 D) 0.0034 E) 0.0643
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- n a study of exhaust emissions from school buses, the pollution intake by passengers was determined for a sample of nine school buses used in the a school district. The pollution intake is the amount of exhaust emissions, in grams per person, that would be breathed in while travelling on the bus during its usual 10-mile trip on congested highways. Here are the amounts for the nine buses when driven with the windows open: 1.15 0.33 0.40 0.33 1.35 0.38 0.25 0.40 0.35 The data can be accessed HERE.Find a 90% confidence interval to estimate the population mean pollution intake μμ by completing the following. The sample mean x¯=x¯= The standard error SE=SE= The tt-critical value t∗=t∗= Lower end of the confidence interval L=L= Upper end of the confidence interval U=U= What is the margin of error? ME=ME=54% of all the town's residents own a dog and 65% own a cat. Of the dog owners 45% also own a cat. If a town resident is chosen at random find: (round to 4 decimal places where possible) а. Р(Own a Dog) b. P(Own a Cat) = c. P(Own a Cat and a Dog) = d. P(Own a Dog GIVEN Own a Cat) =A survey of 10 students was conducted to investigate the amount of time they spend on social media each day. Students were given a timer and asked to record the number of minutes spent every time they accessed social media. The students' total times for one day are given below (in minutes).45 57 63 79 84 92 99 105 117 145 A student who was not included in the survey recorded a time of 240 minutes on social media. That value is: a. clearly an erroneous recording. b. inconsistent with these data. c. consistent with these data. d. an outlier. A group of veterinary researchers plans a study to estimate the average number of enteroliths in horses suffering from them. Previous research has shown the variability in the number to be = 2. The researchers wish the margin of error to be no larger than 0.5 for a 99% confidence interval. To obtain such a margin of error, the researchers need at least:…
- Need this answered please.Sean thinks that he has a special relationship with the number 6. In particular, Sean thinks that he would roll a 6 with a fair 6-sided die more often than you'd expect by chance alone. Suppose pis the true proportion of the time Sean will roll a 6. (a) State the null and alternative hypotheses for testing Sean's claim. (Type the symbol "p" for the population proportion, whichever symbols you need of "", "-", "not =" and express any values as a fraction e.g. p = 1/3) Ho= Ha (b) Now suppose Sean makes n = 30 rolls, and a 6 comes up 6 times out of the 30 rolls. Determine the P-value of the test, giving your answer to 4 decimal places. Please use 3 decimal places in your test statistic when finding the P-value. P-value = ⠀⠀ (c) Answer the question: Does this sample provide evidence at the 5 percent level that Sean rolls a 6 more often than you'd expect? (Type: Yes or No) 4For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.A random sample of 5280 permanent dwellings on an entire reservation showed that 1620 were traditional hogans.
- 7) Estimate the proportion of all households that are very satisfied from the house they are living (question 16 of the survey).Matt thinks that he has a special relationship with the number 2. In particular, Matt thinks that he would roll a 2 with a fair 6-sided die more often than you'd expect by chance alone. Suppose p is the true proportion of the time Matt will roll a 2. (a) State the null and alternative hypotheses for testing Matt's claim. (Type the symbol "p" for the population proportion, whichever symbols you need of "", "=", "not =" and express any values as a fraction e.g. p = 1/3) Ho p= 1/6 = Ha= p > 1/6 (b) Now suppose Matt makes n = 34 rolls, and a 2 comes up 7 times out of the 34 rolls. Determine the P-value of the test: P-value = | (c) Answer the question: Does this sample provide evidence at the 5 percent level that Matt rolls a 2 more often than you'd expect? (Type: Yes or No) noA farmer only grows apple and orange trees in his orchard. 40% of his trees are apple trees. He is concerned that a parasite may be infecting his trees. The probability of the parasite infecting a given apple tree is 5% and the probability of the parasite infecting a given orange tree is 3%. Please give your answers to 3 decimal places, for example 0.305. a) What proportion of his trees are infected by the parasite? Your answer is 1 b) If a given tree is not infected, what is the probability that this tree was an apple tree? Your answer is
- An education researcher claims that 59% of college students work year-round. In a random sample of 600 college students, 354 say they work year-round. At a=0.10, is there enough evidence to reject the researcher's claim? Complete parts (a) through (e) below. Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.). OA. At least % of college students work year-round. OB. At most % of college students work year-round OC. The percentage of college students who work year-round is not % OD.% of college students work year-round Let p be the population proportion of successes, where a success is a college student who works year-round. State Ho and H₂ Select the correct choice below and fill in the answer boxes to complete your choice (Round to two decimal places as needed.). OA. Ho: P> Ha ps OD. Ho P= H₂: p (b) Find the critical value(s) and identify the rejection region(s) Identify…Some students are sampled at random from the cohort at a certain university and their heights recorded. The university has a student cohort of 1000, and 100 students are sampled. Thirty students are 175cm, thirty are 160cm, fifteen are 163cm, ten are 180cm, ten are 158cm, and five are 170cm. To three significant figures, how many resamples of size 100 can one make from this data? 4.53 × 1058 3.72trillion 2.63 × 1051 135million 3.72 x 1048The number of technical books borrowed from the library in a particular week is given in the table. Test the hypothesis that the number of books borrowed is independent of the days of the week with 0.05 margin of error. Monday Tuesday Wednesday Thursday Friday 135 108 120 114 146
