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The following table summarizes a sample of the wait times at two branches of a bank. The district manager wants to construct a two-sample t test to see if there is a significant difference between the average wait times at the two branches.

Branch A B
Mean (minutes) 4.77 5.13
Standard deviation (minutes) 1.45, 45 1.36
Number of observations 20 20

Which of the following are conditions for this type of test?

Choose all answers that apply:


A. The samples are both randomly selected.


B. The wait times within each sample are independent of each other.


C. The wait times within each group are approximately symmetric without outliers.

The Following Table Summarizes A Sample Of The Wait Times At Two Branches Of A Bank The District Manager Wants To Construct A Twosample T Test To See If There I class=

Sagot :

The conditions for this type of sampling test regarding the wait times at two branches of a bank include:

  • The samples are both randomly selected.
  • The wait times within each group are approximately symmetric without outliers.

What is sampling?

It should be noted that sampling simply means a statistical process where a predetermined number of observations are taken from a larger population.

In this case, the samples are both randomly selected and the wait times within each group are approximately symmetric without outliers. When there's a symmetric distribution with no outliers, the mean and standard deviation will be used.

Learn more about sampling on:

https://brainly.com/question/17831271

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