stat
posted by Tracy .
Explain why using the t statistic may be an appropriate alternative to using a zscore

Usually you use ztests when sample sizes are large (n is greater than
or equal to 30) whether or not you know the population standard deviation.
If you do not know the population standard deviation and have a small
sample (n < 30), then you can use ttests.
Respond to this Question
Similar Questions

hypothesis statistic
how a t Test can be employed in hypothesis testing by the use of directional vs. nondirectional hypotheses. Discuss types of research where using the t statistic may be an appropriate alternative to using a zscore. Respond to at least … 
Statistics
Discuss how a t Test can be employed in hypothesis testing by the use of directional vs. non directional hypotheses. Discuss types of research where using the t statistic may be an appropriate alternative to using a zscore. 
stat
If you test the (one sample) null hypothesis that the population proportion p ¡Ü 0.3 and you get the test statistic value of z = 0.98, then using a 5% ignificance level, Question 18 options: the alternative hypothesis looks believable. … 
stat
Weinberger and Spotts compare the use of humor in television ads in the United States and the United Kingdom. Suppose that independent random samples of television ads are taken in the two countries. A random of 400 television ads … 
Statistics
A study was conducted to investigate relationships between different types of standard test scores. On the Graduate Record Examination verbal test, 18 women had a mean of 538.82 and a standard deviation of 114.16, and 12 men had a … 
Statistic/Psychology
In using repression to predict an individuals performance on the criterion based on his or her score on the instrument, the prediction is least accurate when the correlation is: a.1.00 b. 0.00 c 0.50 d. 1.00 
Math.stat help :(
Consider the following hypothesis statement using alpha = .05, and data from two independent samples: Ho: µ1  µ2 = 0 Ha: µ1  µ2 not equal to 0 X1 = 237, X2 = 218 ¬1 = 54, ¬2 = 63 n1 = 42, n2 = 35 a) Calculate the appropriate … 
Statistics in Psychology
What is a proper Null and Alternative HypothesThe CEO of ABC manufacturing commissioned a study to look at the differences between the current salaries of her employees by employee job title. There were three job categories: clerical, … 
STAT
A manufacturer of a new car claims the typical car will average 32 mpg of gasoline. An independent consumer group is skeptical of the claim and thinks the mean gas mileage is significantly different than the 32 claimed. A sample of … 
Statistics
why using the t statistic may be an appropriate alternative to using a zscore