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- A humane society claims that less than 72% of households in a certain country own a pet. In a random sample of 400 households in that country, 272 say they own a pet. At a = 0.10, is there enough evidence to support the society's claim? Complete parts (a) through (c) below. (Type an integer or a decimal. Do not round.) A. Less than 72% of households in the country own a pet. % of households in the country own a pet. C. More than % of households in the country own a pet. D. The percentage households in the country that own a pet is not %. O B. Let p be the population proportion of successes, where a success is a household in the country that owns a pet. State Ho and H₂. Select the correct choice below and fill in the answer boxes to complete your choice. a (Round to two decimal places as needed.) A. Ho:pz Ha: p Ho: P# 0.72 Ha: p= 0.72 OC. Ho: P Ha:psn 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=Too Small Too Large Total Low Income 17 23 40 High Income 24 11 35 Total 41 34 75 Based on this data: (give your answers to parts a-c as fractions, or decimals to at least 3 decimal places. Give your to part d as a whole number.)a) The proportion of all children that drew the nickel too small is: 0.507Incorrect Assume that this proportion is true for ALL children (e.g. that this proportion applies to any group of children), and that the remainder of the questions in this section apply to selections from the population of ALL children.b) If 8 children are chosen, the probability that exactly 2 would draw the nickel too small is: 0.1156Incorrect c) If 8 children are chosen at random, the probability that at least one would draw the nickel too small is:
- Need this answered please.Assume that the population proportion is 0.46. Compute the standard error of the proportion, σp, for sample sizes of 500,000; 1,000,000; 5,000,000; 10,000,000; and 100,000,000. (Round your answers to five decimal places.) sample size of 500,000sample size of 1,000,000sample size of 5,000,000sample size of 10,000,000sample size of 100,000,000 What can you say about the size of the standard error of the sample proportion as the sample size is increased? The standard error of the sample proportion, σp, ---Select--- increases decreases and becomes extremely ---Select--- small large as the sample size becomes huge.7) Estimate the proportion of all households that are very satisfied from the house they are living (question 16 of the survey).
- A news article about airport flights delays said, "Chicago's OHare Field schedule 114,370 flights. Nearly 10 porcets, 1136, were canceled". The correct porcentage was: a)_ near 1% b)_ near 100% c)_ near 10% d)_ near one-tenth of 1%A group of people were asked if they had run a red light in the last year. 111 responded yes, and 815 responded no. find the probablity that if a person is chosen at random,they have run a red light in the last year. answer need to be in a decimal rounded to 2 places.Listed below are the numbers of words spoken in a day by each member of six different couples. Use a 0.05 significant level to test the claim that amount couples, males speak more words in a day than females. Male 5638 21319 17572 16429 46978 25835 Female 5198 21661 19624 13397 41553 28667
- 13. Given P(A) = 0.17, P(B) = 0.42, and P(B|A) = 0.18, what is P(A and B)? Answer in decimal form. Round to 4 decimal places as needed.5Two varieties of corn are grown in 4 different locations. Each location provides a value in pounds for each variety.The table below lists the results. Find the standard error for the difference in the production of the two corn varieties to two decimal places. Variety 1 Variety 2 difference location 1 32.1 34.5 -2.4 location 2 30.6 32.6 -2.0 location 3 33.7 34.6 -0.9 location 4 29.7 31.6 -1.3 mean value 31.53 33.18 -1.65 standard deviation 1.76 1.72 0.68 1.23 0.75 0.34 0.98