I need help can you help me get the answers?

1.) The length of a yardstick was measured 8 times and the results in inches were 34.7, 34.7, 34.8, 34.7, 34.7, 34.8, 34.8 The true length of the yardstick is 36.0 inches. The measurement process appears to (a) be biased and unreliable (b) be reliable but somewhat biased fe) be unbiased and unreliable d) be unbiased and reliable 2.) A company database contains the following information about each employee: age, date hired, sex (male or female), ethnic group (Asian, black, Hispanic, etc.), job category (clerical, management, technical, etc.), yearly salary. Which of the following lists of variables are all numerical? (a) age, sex, ethnic group. (b) sex, ethnic group, job category. (c) ethnic group, job category, yearly salary. (d) yearly salary, age. 3.) Alex's income two years ago was $210,000. Last year her income was only $50,000. The percent change in Michelle's income was (a) 76.2% decrease (b) 320% decrease (c) 31.3% decrease (d) 23.8% decrease (e) None of these 4.) In January of 1997, the price of an ipod "Shuffle" rose from $131 to $162. (These iPods are now way cheaper!) What percent increase is this? (a) 19.1% (b) 23.7% (c) 80.9% (d) 123.7% 5.) It is hard to measure "sense of humor." Let's do it the easy way: measure weight and call the result "humor index." Not only is this method easy, it gives the same number every time we repeat the measurement on the same person. Measuring "funniness" this way is (a) not reliable and not valid. (b) highly reliable but not valid. (c) valid, but not reliable. 'd) both valid and highly reliable