ISDS 361A Exam 1 with Questions and Answers, Exams of Business Economics

ISDS 361A Exam 1 with Questions and Answers A company has developed a new computer sound card whose average lifetime is unknown. In order to estimate this average, 200 sound cards are randomly selected from a large profuction line and tested; their average lifetime is found to be 5 years. The 200 sound cards represent a: ANSWER✓✓ Sample In inferential statistics we seek to infer? ANSWER✓✓ Population Parameters Statistics is ANSWER✓✓ A way of getting information from data Which one of the following is among the likely cause of a non-random sample? ANSWER✓✓ Non response bias Which of the following is an example of a population parameter? ANSWER✓✓ n Which of the following measure of variability focuses only on the middle 50%? ANSWER✓✓ Interquartile Range The use of the Empirical Rule requires? ANSWER✓✓ The data to resemble normal distribution The two parameters of a normal distribution are _____ and ______ ANSWER✓✓ mu and