Write down a results section in APA style for following confidence interval estimates. The APA style results section must include:
a. A brief statement describing the research by specifically mentioning the variable examined in describing the sample and population to be compared
b. A statement of statistical tests used
c. The probability of Type I error
d. The mean for population
e. The sample size, mean and standard deviation for sample
f. The confidence interval results stated in terms of range of scores
g. An explanation of the results in words referring to variable examined taste on the interval computed.
A common test of short-term memory requires participants to repeat random string of digits that was presented a few seconds earlier.
The number of digits is increased on each trial till the person begins to make mistakes. The longest string which can be reported accurately determines the participants score. The following data were obtained from sample of n = 9 participants. The scores are 4, 3, 12, 5, 7, 8, 10, 5, 9.
A. Calculate the mean and variance for the sample.
M = 7.00 and s² = 9
B. Employ the data to make a point estimate of population mean.
Use M = 7.00 as the point estimate for µ.
C. Make an 80% confidence interval estimate of µ.
With df = 8 and estimated standard error of 1.00, the boundaries for 80% confidence are t = ± 1.397, and interval extends from 5.603 and 8.397.