In a survey, the hair colors of respondents are identified as 0 for brown hair, 1 for blondehair, 2 for black hair, and 3 for anything else. The average (mean) is calculated for 625 respondents and the result is 1.1. a.The data are at the nominal level of measurements.What is wrong with the given calculation?
10.A frequency table of grades has five classes (A, B, C, D, F) with frequencies of 2, 13, 17, 6, and 1 respectfully. Using percentages, what are the relative frequencies of the five classes?
11.A _______ helps us understand the nature of the distribution of a data set.
12.Heights of adult males are normally distributed. If a large sample of heights of adult males is randomly selected and the heights are illustrated in a histogram, what is the shape of that histogram?
13.A student earned grades of 84, 78, 84, and 72 on her four regular tests. She earned a gradeof 78 on the final exam and 86 on her class projects. Her combined homework grade was 87. The four regular tests count for 40% of the course grade, the final exam counts for 30%, the project counts for 10%, and homework counts for 20%. What is her weighted mean grade? Round to one decimal place.
14.A student earned grades of B, B, A, C, and D. Those courses had these corresponding numbers of credit hours: 4, 5, 1, 5, 4. The grading system assigns quality points to letter