Gosset discovered the t distribution while attempting to: A) conduct experiments
ID: 2957598 • Letter: G
Question
Gosset discovered the t distribution while attempting to:
A) conduct experiments related to genes and environment
B) solve the mystery of the normal curve
C) improve the quality of beer for Guinness brewers
D) improve the quality of life for German students
When estimating the variance of a population from the sample, you can not use the sample's variance directly because:
A) it tends to be slightly too small
B) it is based on using absolute deviations
C) it tends to be slightly too large
D) it is based on using squared deviations
Which of the following is the best way to reduce the variances in the distributions of means when conducting a t test for independent means?
A) use the true population variance
B) increase the size of the samples
C) treat the two samples as one sample
D) raise the study's level of significance
A mathematically defined curve that is the comparison distribution used in ANOVA is called the:
A) normal distribution
B) Chi square distribution
C) T distribution
D) F distribution
Which of the following is true about t distributions?
A) The larger the sample size, the more a t distribution resembles a normal curve
B) There are exactly 10 categories of t distributions
C) For any given sample size, there are between two and N - 1 appropriate t distributions
D) t distributions are generally bimodal
When conducting an ANOVA, the within-groups population variance estimate is the sum of the population variance estimates based on each sample, divided by the:
A) sample size
B) number of groups minus 1
C) degrees of freedom
D) number of groups
Because of the assumption that the population variances are equal, when you do an analysis of
variance:
A) you need fewer degrees of freedom
B) you use actual population parameters in place of sample statistics
C) you figure an averaged estimate of the population variance
D) sample variances are not important
When conducting a
A) pooled estimate of the population variance
B) power of the study
C)
D) variance of the distribution of differences between means
Explanation / Answer
Q1 -- C Q2 -- A Q3 -- B Q4 -- D Q5 -- A Q6 -- D Q7 -- C Q8 -- A
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