Question 1,2

1. Is the temperature required to damage a computer on the average more than 114 degrees? Twenty-one computers were tested to see what minimum temperature will damage the computer. The damaging temperature averaged 110 degrees with a standard deviation of 3.5 degrees. Assume that the distribution of all computers' damaging temperatures is approximately normal. Use a = 0.05. a. Write Null and alternate hypotheses. Indicate the tail (left tailed, right tailed, or two tailed) b. Find Sample Test Statistics (write formula and round your answer to two decimal places) c. Find P-value and compare with a (round your answer to four decimal places) d. Do you reject or fail to reject Ho e. Write a good conclusion in the context of the application f. Find a confident interval (use a from the problem) g. Write the possible error 2. Is the national crime rate really going down? Some sociologists say yes! They say that the reason for the decline in cri rates in the 1980s and 1990s is demographics. It seems that the population is aging, and older people commit fewer cri According to the FBI and the Justice Department, 60% of all arrests are of males aged 15 to 34 years. Suppose you are sociologist in Huntsville, AL, and a random sample of police files showed that of 220 arrests last month, 108 were of m aged 15 to 34 years. Use a 1% level of significance to test the claim that the population proportion of such arrests in R Springs is different from 65%. a. Write Null and alternate hypotheses. Indicate the tail b. Find Sample Test Statistics (write formula and round your answer to two decimal places) c. Find P-value and compare with a (round your answer to four decimal places) d. Do you reject or fail to reject Ho e. Write a good conclusion in the context of the application f. Find a confident interval (use a from the problem) g. Write the possible error