test.mean {statpsych} | R Documentation |
Computes a one-sample t-test for a population mean using the estimated mean, estimated standard deviation, sample size, and null hypothesis value. Use the t.test function for raw data input. A confidence interval for a population mean is a recommended supplement to the t-test (see ci.mean).
test.mean(m, sd, n, h)
m |
estimated mean |
sd |
estimated standard deviation |
n |
sample size |
h |
null hypothesis value of mean |
Returns a 1-row matrix. The columns are:
t - t test statistic
df - degrees of freedom
p - two-sided p-value
Snedecor GW, Cochran WG (1989). Statistical Methods, 8th edition. ISU University Pres, Ames, Iowa.
test.mean(24.5, 3.65, 40, 23)
# Should return:
# t df p
# 2.599132 39 0.01312665