Random samples of 20 women and 25 men are selected from the population of first- level managers of a health organization. The table provides salary information (in $1000). Women Men 56.8 52.1 53.3 61.8 62.9 63.1 60.8 57.6 58.6 62.1 50.2 65.6 64.3 66.8 57.8 71.4 57.9 62.8 58.0 63.8 63.8 52.2 58.8 71.2 60.2 59.2 55.2 62.9 61.2 66.2 63.4 65.9 61.1 52.5 54.6 66.9 56.3 70.4 57.4 60.1 60.6 68.4 64.2 62.9 63.2 The data for this exercise is in the SPSS dataset, MANAGER SALARIES, on the course Canvas site. a. Please use SPSS to perform two sample t test and provide the SPSS output b. Based on the SPSS output, which set of results should you adopt, the one assuming equal variances or the one not assuming equal variances? Why?

SPHL 6050 - BIOSTATISTICS FOR PUBLIC HEALTH - SU 2024 2 c. Based on the results you adopt, can you conclude there is a significant difference of the sample means between men and women? Why? 2. Researchers measured the free calcium concentration in blood platelets of 12 people with normal blood pressure and 25 people with high blood pressure. The results are given in the table. Normal High 95 124 108 136 123 133 115 132 80 123 130 147 110 136 98 152 108 122 107 179 97 201 106 124 189 176 129 143 165 153 142 120 133 178 182 183 140 The data for this exercise is in the SPSS dataset, BP_CALCIUM, on the course Canvas site. a. Please use SPSS to perform two sample t test and provide the SPSS output b. Based on the SPSS output, which set of results should you adopt, the one assuming equal variances or the one not assuming equal variances? Why?

SPHL 6050 - BIOSTATISTICS FOR PUBLIC HEALTH - SU 2024 3 c. Based on the results you adopt, can you conclude there is a significant difference of the sample means between the two groups? Why?