(8) In a class of 45 students, Al has a rank of rank of 14. Determine his percentile (after rounding). (а) 69 (b) 71 (c) 73 (d) 75 (e) 77
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- For the following exercises, use Table 4 which shows the percent of unemployed persons 25 years or older who are college graduates in a particular city, by year. Based on the set of data given in Table 5, calculate the regression line using a calculator or other technology tool, and determine the correlation coefficient. Round to three decimal places of accuracyFor the following exercises, consider this scenario: The population of a city increased steadily overa ten-year span. The following ordered pairs show the population and the year over the ten-year span (population, year) for specific recorded years: (3,600,2000);(4,000,2001);(4,700,2003);(6,000,2006) 44. What is the correlation coefficient for this model tothree decimal places of accuracy?A researcher is interested in hamster wheel-running activity during the summer versus the winter. She suspects that either the hamsters will run less during the winter to conserve energy or they will run more to keep warm. She records the activity of n = 25 hamsters during June, July, and August and compares their running-wheel revolutions per hour to the activity of the same hamsters during December, January, and February. The data are collected, and the results show an average difference score of MD = 5. 7 and a sum of squares of SS = 2,851.44. What is the estimated standard error of the mean difference (SMD) for this study? (two decimals)
- A researcher is interested in hamster wheel-running activity during the summer versus the winter. She suspects that either the hamsters will run less during the winter to conserve energy or they will run more to keep warm. She records the activity of n = 25 hamsters during June, July, and August and compares their running-wheel revolutions per hour to the activity of the same hamsters during December, January, and February. The data are collected, and the results show an average difference score of MD = 5. 7 and a sum of squares of SS = 2,851.44. What is the sample standard deviation (s) for the D scores? (one decimal)A researcher is interested in hamster wheel-running activity during the summer versus the winter. She suspects that either the hamsters will run less during the winter to conserve energy or they will run more to keep warm. She records the activity of n = 25 hamsters during June, July, and August and compares their running-wheel revolutions per hour to the activity of the same hamsters during December, January, and February. The data are collected, and the results show an average difference score of MD = 5. 7 and a sum of squares of SS = 2,851.44. What is the value for degrees of freedom for this repeated-measures t test?A researcher is interested in hamster wheel-running activity during the summer versus the winter. She suspects that either the hamsters will run less during the winter to conserve energy or they will run more to keep warm. She records the activity of n = 25 hamsters during June, July, and August and compares their running-wheel revolutions per hour to the activity of the same hamsters during December, January, and February.The data are collected, and the results show an average difference score of MD = 5.4 and a sum of squares of SS = 1,142.64. What is the value for degrees of freedom for this repeated-measures t test? a) 25 b) 37 c) 24 d) 34 What is the sample standard deviation (s) for the D scores? a) 1.38 b) 1,142.64 c) 6.9 d) 47.61 What is the estimated standard error of the mean difference (sMD) for this study? a) 1.38 b) 1.17 c) 1.90 d) 0.28
- A study found correlation r=0.43 between high school math grades ( on a 0 to 100 scale ) and income 10 years after high school This means that ?A researcher is interested in hamster wheel-running activity during the summer versus the winter. He suspects that either the hamsters will run less during the winter to conserve energy or they will run more to keep warm. He records the activity of n = 16 hamsters during June, July, and August and compares their running-wheel revolutions per hour to the activity of the same hamsters during December, January, and February. The data are collected, and the results show an average difference score of MDD = 3.8 and a sum of squares of SS = 522.15. What is the value for degrees of freedom for this repeated-measures t test? 47 15 50 16 What is the sample standard deviation (s) for the D scores? 1.48 5.9 522.15 34.81 What is the estimated standard error of the mean difference (sMDMD) for this study? 0.37 2.18 1.48 1.22Among a sample (N = 50) of college basketball players, height (HT) is inversely correlated with points per game (PPG) r = -.40. Given the means and SDs below, what would a player who is 79 in. tall be expected to score per game? MHT = 76 in MPPG = 12.4SDHT = 2.5 in. SDPPG = 5.0
- A researcher computes the correlation coefficient r =r= -0.3700 for an explanatory and response variable. What proportion of the changes in the response variables value is accounted for by the change in the explanatory variable's value? Give your answer to four decimal places.A researcher interested in exercise endurance in older adults with coronary heart disease measured the endurance of 450 older adults during an exercise routine on a scale of 0-10. He obtained a mean (SD) rating of 6.2 (3.4). Compute the 85% C. I: _____________.When results from a scholastic assessment test are sent to test-takers, the percentiles associated with their scores are also given. Suppose a test-taker scored at the 99th percentile for their verbal grade and at the percentile for their quantitative grade. Interpret these results 1.This student performed better than 1% of the other test-takers in the verbal part and better than in the quantitative part. 2,This student performed better than 99% of the other test-takers in the verbal part and better than 64% in the quantitative part. 3.This student performed better than 1% of the other test-takers in the verbal part and better than 64% in the quantitative part. 4.This student performed better than 99% of the other test-takers in the verbal part and better than in the quantitative part.