Os moradores de um condomínio combinaram de comprar um cortador de grama em sociedade. O valor da máquina era de R$ 1.235,00. Na semana da compra, quatro moradores desistiram de participar da sociedade. Considerando x como o número de moradores que haviam combinado a compra do cortador de grama, a fração algébrica que representa a quantia que cada morador pagou pela máquina após a desistência dos outros é

The survey of study habits and attitudes (ssha) is a psychological test that measures the motivation, attitude toward school, and study habits of students, scores range from 0 to 200. the mean score for u.s. college students is about 115, and the standard deviation is about 30. a teacher who suspects that older students have better attitudes toward school gives the ssha to 55 students who are at least 30 years of age. the mean score is 113.2. assume the population standard deviation is 30 for older students what is the margin of error for a 95% confidence interval for the population mean score for a. older students? b. compute the 95% confidence interval for the population mean score for older students. c. compute the 99% confidence interval for the population mean score for older students. d. compute the 88% confidence interval for the population mean score for older students.