A researcher wishes to test the hypothesis that the mean age at first marriage for women in Texas is less than 23. In a sample of 46 Texas women, he finds that the average age is 25.8 with a standard deviation of 4. Calculate the test statistic to two decimal places?

Answer asap ill give ! ’ a sample of radioactive material decays over time. the number of grams, y , of the material remaining x days after the sample is discovered is given by the equation y = 10(0.5)^x. what does the number 10 represents in the equation? a. the half-life of the radioactive material, in days b. the amount of the sample, in grams, that decays each day c. the time, in days, it will take for the samples to decay completely d. the size of the sample, in grams, at the time the material was discovered