Question 7: Measurements on a number of physiological variables for a sample of 8 males and 8 female adolescent tennis players were reported in âPhysiological and Anthropometric Profiles of Elite Prepubescent Tennis Playersâ (Sportsmed. (1984); 111-116). A 95% t confidence interval for the difference in mean grip strength (assuming equal variance) between boys and girls was given as: (-1.94, 5.34). What was the estimated standard error for XBÂŻâXGÂŻthe researchers used? Group of answer choices 2.145 1.697 3.64 1.717 2.067
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Measurements on a number of physiological variables for a sample of 8 males and 8 female adolescent tennis players were reported in "Physiological and Anthropometric Profiles of Elite Prepubescent Tennis Players" (Sportsmed. (1984); 111-116). A 95% t confidence interval for the difference in mean grip strength (assuming equal variance) between boys and girls was given as: (-1.94, 5.34). What was the estimated standard error the researchers used? 1.5 2.145 11.53 1.697
Qudsiya A.
Adult males are taller, on average, than adult females. Visiting two recent American Youth Soccer Organization (AYSO) under 12 year old (U12) soccer matches on a Saturday, you do not observe an obvious difference in the height of boys and girls of that age. You suggest to your little sister that she collect data on height and gender of children in 4th to 6th grade as part of her science project. Here are her findings. In a sample of 81 boys, your sister finds that the sample average is equal to 60.07 with a sample standard deviation of 1.38. Suppose this is Group 1. In a sample of 54 girls, your sister finds that the sample average is equal to 58.21 with a sample standard deviation of 1.81. Suppose this is Group 2. Let your null hypothesis be that there is no difference in the mean height of females and males at this age level. The standard error of the difference between their mean scores is [ ]. (Round your answer to two decimal places.) The 95% confidence interval for the difference between the mean height of females and males at this age level: [ , ]. (Round your answer to two decimal places .) Using the standard error value you found above, calculate the t-statistic for comparing the two means. [ ] (Round your answer to two decimal places .)"
Madhur L.
A researcher wanted to know if there was a difference in minutes of active play during recess for 2nd-grade girls and 2nd-grade boys. Twenty-three 2nd-grade girls played for a mean of x18.44 minutes and 19 2nd-grade boys played for a mean of x19.15 minutes. The standard error for the difference between the means was x0.73. Treat the girls as Group 1 and the boys as Group 2. Calculate the upper boundary of the 95% confidence interval. Report your answer rounded to the nearest two decimal places.
Luke H.
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