The Arab Youth Survey showed that a 95% confidence interval of the proporrtion of young Arabs who would most like to live in UAE is (0.4973, 0.5942). Find the sample proportion of young Arabs who would most like to live in UAE. Round your answer to four decimal places.
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- The percent of the population that is left-handed has historically been 10%. In a random sample of n=500 people there are 58 that are left-handed. The researcher would like to test the hypothesis that the percent of the population that is left-handed has increased. Determine the value of the test statisticUse the sample data and confidence level given below to complete parts (a) through (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n=964 and x = 540 who said "yes." Use a 95% confidence level.A poll of 1200 people is taken. Find the margin of error assuming a 95% level of confidence.
- find tc for a 95% confidence level when the sample size is 6.The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 52 records of automobile driver fatalities in a certain county showed that 35 involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alcohol is less than 77% in Kit Carson County? Use ? = 0.10. What is the value of the sample test statistic? (Round your answer to two decimal places.)=__ (c)Find the P-value of the test statistic. (Round your answer to four decimal places.)=__A news article that you read stated that 50% of voters prefer the Democratic candidate. You think that the actual percent is smaller. 128 of the 284 voters that you surveyed said that they prefer the Democratic candidate. What can be concluded at the 0.01 level of significance?
- A jeep gets 53 highway miles per gallon. Howvever, an SUV believes gas mileage for their new line is much better. In order to test, they collect a random sample of 8 jeeps. The results of the 8 cars tested as as follows: 56, 51, 55, 54, 57, 48, 56, and 51. If you perform this test at a= .05 level, state the p-value and the conclusion of the test.A survey was conducted that asked 1013 people how many books they had read in the past year. Results indicated that x=10.3 books and s=16.6books. Construct a 90% confidence interval for the mean number of books people read. Interpret the interval. Construct a 90% confidence interval for the mean number of books people read and interpret the result. Select the correct choice below and fill in the answer boxes to complete your choice. (Use ascending order. Round to two decimal places as needed.) A. There is a 90% probability that the true mean number of books read is between ___ and ____ B. There is 90% confidence that the population mean number of books read is between ___ and ____. C. If repeated samples are taken, 90% of them will have a sample mean between ___ and ___.The first pic is the question, since I’ve been receiving some incorrect answers from the tutors, I included an example problem in the second pic.
- PrActicE the legalization of marijuana. Among the Democratic voters surveyed, 158 of the 200 people aged 18-29 and 210 of the 300 people aged 50-64 supported legalizing marijuana. Is this difference significant at a = .05? A random sample of individuals in one town was surveyed about their position onA survey was conducted that asked 963 people how many books they had read in the past year. Results indicated that x=14.7 books and s=17.8 books. Construct a 90% confidence interval for the mean number of books people read. Interpret the interval.Construct a 90% confidence interval for the mean number of books people read and interpret the result. Select the correct choice below and fill in the answer boxes to complete your choice.(Use ascending order. Round to two decimal places as needed.)A. If repeated samples are taken, 90% of them will have a sample mean between ___ and ____ B. There is a 90% probability that the true mean number of books read is between ____ and ___ C. There is a 90% confidence that the population mean number of books read is between ___ and ___The distances golf balls travel under laboratory testing conditions are normally distributed. The mean is 312 yards. The probability the golf ball travels further than 319 yards is 0.28. Find the probability a randomly selected golf ball travels between 305 yards and 319 yards. Express the answer as a decimal value rounded to the nearest hundredth.