A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey, can affect mental alertness. A sample of n = 9 college students is obtained, and each student’s performance on a familiar video game is measured before and after eating a traditional Thanksgiving dinner including roast turkey. The average score dropped by MD = 14 points after the meal with SS = 1152 for the difference scores. What is the critical value of t for two tailed, alpha 0.05. Give the exact number from Table B2. What is the sample variance? Report a number to one decimal. What is the sample standard deviation? Report to one decimal What is the value for the estimated standard error? Report to one decimal. What if the observed t value from the example above? Answer to two decimals. How many degrees of freedom are in the current study? Report a whole number no decimals.
A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey, can affect mental alertness. A sample of n = 9 college students is obtained, and each student’s performance on a familiar video game is measured before and after eating a traditional Thanksgiving dinner including roast turkey. The average score dropped by MD = 14 points after the meal with SS = 1152 for the difference scores.
What is the critical value of t for two tailed, alpha 0.05. Give the exact number from Table B2.
What is the sample variance? Report a number to one decimal.
What is the sample standard deviation? Report to one decimal
What is the value for the estimated standard error? Report to one decimal.
What if the observed t value from the example above? Answer to two decimals.
How many degrees of freedom are in the current study? Report a whole number no decimals.
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