The data in Table 8.2 are the result of a random survey of 39 national flags (with replacement between picks) from various countries. We are interested in finding a confidence interval for the true mean number of colors on a national flag. Let X = the number of colors on a national flag. X Freq 1 3 18 4 7 5 6 What is the margin of error (error bound) of 95% confidence interval for the true mean number of colors on national flags. O 0.33 O 0.23 O 0.43 O 0.53 Question 7 Marketing companies are interested in knowing the population percent of women who make the majority of household purchasing decisions. When designing a study to determine this population proportion, what is the minimum number you would need to survey to be 90% confident that the population proportion is estimated to within 0.05? O 271 O 261Question 8 5 | Suppose the marketing company did do a survey. They randomly surveyed 200 households and found that in 1 20 of them, the woman made the majority of the purchasing decisions. We are interested in the population proportion of households where women make the majority of the purchasing decisions. identity the following: x; n; p\" O 120: 200; 60% O 120: 200; 40% O 200: 120; 60% O 200: 120; 40% Question 9 5 | The ice Chalet offers dozens of different beginning iceskating classes. All of the class names are put into a bucket. The 5 P. M._. Monday night, ages 8 to 12, beginning iceskating class was picked. in that class were 64 girls and 16 boys. Suppose that we are interested in the true proportion of giris. ages 8 to 12' in all beginning iceskating classes at the ice Chalet. Assume that the 80 children in the seiected ciass one a random sample of the population. Calculate the following: lower limit; upper limit; error bound or margin of error 0 0.?2; 0.88: 0.08 O 0.62; 0.?8: 0.08 O 0.82; 0.88: 0.06 O 0.?2; 0.88: 0.06 Question 10 5 p The average height of young adult males has a normal distribution with standard deviation of 2.5 inches. You want to estimate the mean height of students at your college or university to within one inch with 93% confidence. How many male students must you measure? Round up your answer because the number of male students cannot be in fraction. O 21 O 20 O 22 O 19