When testing the claim in Exercise 1, what are the observed and expected frequencies for the last

Question:

When testing the claim in Exercise 1, what are the observed and expected frequencies for the last digit of 7?

Refer to the sample data in the following table, which summarizes the last digits of the heights (cm) of 300 randomly selected subjects (from Data Set 1 “Body Data” in Appendix B). Assume that we want to use a 0.05 significance level to test the claim that the data are from a population having the property that the last digits are all equally likely.