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Title: Midterms are approaching and students may not be eating as well as usual. Four s Post by: foxy10 on Sep 28, 2015 1. Midterms are approaching and students may not be eating as well as usual. Four students were asked how many calories of junk food they had consumed between noon and 10 pm on the day before an exam. The estimated numbers of nutritionless calories were 450, 670, 1130, and 1460.
a. Calculate the variance for these scores. b. Calculate the standard deviation for these scores. c. If a researcher was interested only in these four students, what symbols would she use for variance and standard deviation, respectively? d. If another researcher hoped to generalize from these four students to all students at the university, what symbols would he use for variance and standard deviation? 2. A study of Consideration of Future Consequences (CFC) found a mean score of 3.51 and a standard deviation of .61 for the 664 students in a population of interest. a. If your CFC score was 4.2, what would your z score be? Explain why your answer makes sense. b. If your CFC score was 3.0, what would your z score be? Explain why your answer makes sense. c. If your z score was 0, what would your CFC score be? Explain. Title: Re: Midterms are approaching and students may not be eating as well as usual. Four s Post by: psyche360 on Oct 1, 2015 1. Midterms are approaching and students may not be eating as well as usual. Four students were asked how many calories of junk food they had consumed between noon and 10 pm on the day before an exam. The estimated numbers of nutritionless calories were 450, 670, 1130, and 1460. a. Calculate the variance for these scores. b. Calculate the standard deviation for these scores. c. If a researcher was interested only in these four students, what symbols would she use for variance and standard deviation, respectively? d. If another researcher hoped to generalize from these four students to all students at the university, what symbols would he use for variance and standard deviation? Population size:4 Mean (μ): 927.5 Variance (σ2): 154718.75 Standard deviation (σx̅): 454.19 Title: Re: Midterms are approaching and students may not be eating as well as usual. Four s Post by: foxy10 on Oct 3, 2015 Thank you very much do you by any chance have the answers for the other questions?
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