Do private practice doctors and hospital doctors have the same distribution of working hours? Suppose that a sample of 100 private practice doctors and 150 hospital doctors are selected at random and asked about the number of hours a week they work.  You may use technology to compute your answers. 20–30 30–40 40–50 50–60 Total Private Practice 16 40 38 94 Hospital 8 44 59 111 Total 24 84 97 205   1. State the null and alternative hypotheses:  H0= dependent or independent  Ha= dependent or independent  2. df= 3.What is the test statistic?                             4. What is the p-value?                                  5. What can you conclude at the 5% significance level?

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.