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- A researcher is conducting a Chi2 for Independence test to evaluate a relationship between gender (i.e., male or female) and preference for 4 different colors of a new car (White, Red, Black or Gray). If the data was analyzed by Chi2 for Independence and produced the Chi2 = 11.21, what is the conclusion from this study (assume p < .01)?X8.3.23-T Question Help Assume that a simple random sample has been selected from a normally distributed population and test the given claim. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. A safety administration conducted crash tests of child booster seats for cars. Listed below are results from those tests, with the measurements given in hic (standard head injury condition units). The safety requirement is that the hic measurement should be less than 1000 hic. Use a 0.01 significance level to test the claim that the sample is from a population with a mean less than 1000 hic. Do the results suggest that all of the child booster seats meet the specified requirement? 742 761 1326 609 627 435 OA Ho: H= 1000 hic B. Ho: µ= 1000 hic H1: µ= 1000 hic H1: p 1000 hic H1: p> 1000 hic H1 H< 1000 hic Identify the test statistic. t3 (Round to three decimal places as needed.) () More Ou Enter your answer in the…A psychologist wants to know if technology use affects our happiness. They randomly select 90 individuals and measure their happiness (0-100) and classify their technology use into one of three categories (low, medium, and high). Use the data Happiness and Tech Survey in StatCrunch to test if the mean happiness scores of the 3 technology groups are different. (Let α = 0.10) What are the hypothesis statements for this situation?
- A chi-square independence test is to be conducted to decide whether an association exists between two variables of a population. One variable has six possible values, and the other variable has four. What is the degrees of freedom for the χ2-statistic?5.63 Find the mean and variance of the random vari- able X in Exercise 5.58, representing the number of hurricanes per year to hit a certain area of the eastern United States.The Trial Urban District Assessment (TUDA) is a government-sponsored study of student achievement in large urban school districts. TUDA gives a mathematics test scored from 0 to 500. A score of 262 is a "basic" mathematics level, and a score of 299 is "proficient." Scores for a random sample of 1100 eighth-graders in Dallas had x = 264 with standard error 1.3. TUDA results for 2019 from the National Center for Education Statistics, at https://www.nationsreportcard.gov. O Macmillan Learning (b) Identify a 99% confidence interval for the mean score of all Dallas eighth-graders. (Be careful: the report gives the standard error of x, not the standard deviation s.) O 261.9 to 266.1 O260.6 to 267.4 O261.4 to 266.6 O 262.7 to 265.3
- A reasearcher selects a sample of 100 people to investigate the relationship between gender (male/female) and regestering to vote. The sampple consists of 40 female , of whom 30 are regestered voters, and 60 males of whom 40 are regestered voters. If these data were used for chi-square test for independence, what is the observed frequency for registered males?A clinical study was conducted on a medicine and the data obtained as follows: calculate Sensitivity Diseased •True Positive: 1000 •True negative: 50 Non diseased •True positive: 100 •True negative: 800The Trial Urban District Assessment (TUDA) is a government-sponsored study of student achievement in large urban school districts. TUDA gives a mathematics test scored from 0 to 500. A score of 262 is a "basic" mathematics level, and a score of 299 is "proficient." Scores for a random sample of 1100 eighth-graders in Dallas had x = 264 with standard error 1.3. TUDA results for 2019 from the National Center for Education Statistics, at https://www.nationsreportcard.gov. LO 5 DEC 1 S tv ♫ ♫ O Macmillan Learning (c) Is there good evidence that the mean for all Dallas eighth-graders is different from the basic level? F8 OYes, because the sample mean of 264 is not included in the 99% confidence interval. Yes, because the basic level of 262 is not included in the 99% confidence interval. O No, because the basic level of 262 is included in the 99% confidence interval. O No, because the sample mean of 264 is included in the 99% confidence interval. N 1917 66 7 A 72 P GE zoom
- The Trial Urban District Assessment (TUDA) is a government-sponsored study of student achievement in large urban school districts. TUDA gives a mathematics test scored from 0 to 500. A score of 262 is a "basic" mathematics level, and a score of 299 is "proficient." Scores for a random sample of 1100 eighth-graders in Dallas had x = 264 with standard error 1.3. TUDA results for 2019 from the National Center for Education Statistics, at https://www.nationsreportcard.gov. O Macmillan Learning (a) We don't have the 1100 individual scores, but use of the t procedures is surely safe. Why? O Because the data has a strong skew. O Because the sample size is very large. O Because use of the t procedures is always safe. O Because the sample doesn't have outliers.QDOS-A Are there more children diagnosed with Autism Spectrum Disorder (ASD) in states that have larger urban areas over states that are mostly rural? In the state of Pennsylvania, a fairly urban state, there are 245 eight year olds diagnosed with ASD out of 18,440 eight year olds evaluated. In the state of Utah, a fairly rural state, there are 45 eight year olds diagnosed with ASD out of 2,123 eight year olds evaluated ("Autism and developmental," 2008). Is there enough evidence to show that the proportion of children diagnosed with ASD in Pennsylvania is more than the proportion in Utah? Test at the 1% level. (i) Let p1 = proportion of children diagnosed with ASD in Pennsylvania and p2 = proportion of children diagnosed with ASD in Utah. Which of the following statements correctly defines the null hypothesis HO? A. p1 + p2 > 0 B. p1 + p2 = 0 C. μ1 = μ2 D. p1 = p2 Enter letter corresponding to correct answer (ii) Let p1 = proportion of children diagnosed with ASD in…In a study of red/green color blindness, 700700 men and 26502650 women are randomly selected and tested. Among the men, 6363 have red/green color blindness. Among the women, 77 have red/green color blindness. Test the claim that men have a higher rate of red/green color blindness. The test statistic is Is there sufficient evidence to support the claim that men have a higher rate of red/green color blindness than women?A. No B. YesConstruct the 9999% confidence interval for the difference between the color blindness rates of men and women. <(?1−?2)<<(p1−p2)<