statistics

TEST STATISTICS on POPULATION MEAN and PROPORTION ACTIVITIES I. Solve the given problem using the stepby-step procedure of solving TEST STATISTICS. a. The school nurse thinks the average height of 11'\" graders has decreased. The average height of a 11'\" grader five years ago was ioacm with a standard deviation 20cm. She takes a random sample of 200 students and finds that the average height of her sample is 160cm. Using 95% condence level. are 11 "' graders new smaller than those \"[1"11 graders before? b. The heart rates of 50 patients in an ICU have a mean of 95.3 beatsfmin and standard deviation 16.9 beatsrmin. Are heart rates from [EU patients faster than usual? Given normal heart rate mean of 7'2 beatsfmin with a signicance of 0.05. c. An English teacher wanted to test the mean reading speed of students of 550 words per minute. A. sample of 25 students revealed a sample mean of 542 words per minute with a standard deviation of 25 words per minute. At 0.10 significance level. is the reading speed different from 550 words per minute? d. It has been claimed that 30% of students in a particular SHS dislike Mathematics. When a survey was conducted by a researcher. It showed that 145 of 300 students dislike Mathematics. Test if the claim was different at o = 0.1 0 level. e. It has been claimed that 50% of qualified applicants passed in a particular job interview. When a survey was conducted by a researcher of a certain company. it showed that 35 of 1 55 applicants passed the job Interview. Test If the claim was larger at o = 0.05 level. ESSAY Kindly lust explain the purpose or goal of each step In solving test statistics. Also give your thoughts about the impedance of this lesson