## Questions and Answers

Which statistical test should be performed to determine if the number of emails follows a uniform distribution?

Chi-square test for goodness of fit

What is the expected number of emails David was expecting to receive each day?

30

What is the formula for calculating the chi-squared test statistic?

$\chi^2 = \sum \frac{(O - E)^2}{E}$

What is the chi-squared test statistic for the given data?

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## Study Notes

### Determining Distribution of Emails

- To determine if the number of emails follows a uniform distribution, a
**chi-squared goodness of fit test**should be performed.

### Expected Emails per Day

- David was expecting to receive an
**equal number of emails each day**, implying a uniform distribution.

### Chi-Squared Test Statistic Formula

- The formula for calculating the chi-squared test statistic is:
**χ² = Σ [(Oi - Ei)² / Ei]**, where Oi is the observed frequency and Ei is the expected frequency.

### Chi-Squared Test Statistic for the Given Data

- The chi-squared test statistic for the given data needs to be calculated using the formula and the provided data.

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