According to a study conducted by an organization, the proportion of americans who were afraid to fly in 2006 was 0.10. a random sample of 1,300 americans results in 143 indicating that they are afraid to fly. explain why this is not necessarily evidence that the proportion of americans who are afraid to fly has increased. select the correct choice below and. if necessary, fill in the answer box to complete your choice. this is not necessarily evidence that the proportion of americans who are afraid to fly has increased above 0.10 because the probability of obtaining a value equal to or more extreme than the sample proportion is . which is not unusual.

The correct option is A) This is not necessarily evidence that the proportion of Americans who are afraid to fly has increased above 0.10 because the probability of obtaining a value equal to or more extreme than the sample proportion is . which is not unusual.

Step-by-step explanation:

Consider the provided information.

The formula for testing a proportion is based on the z statistic.

Were is sample proportion.

hypothesized proportion and n is the sample space,

The proportion of Americans who were afraid to fly in 2006 was 0.10. A random sample of 1,300 Americans results in 143 indicating that they are afraid to fly.

Therefore, n = 100   , and

Substitute the respective values as shown:

P(x>sample proportion)=p(z>1.20)=0.11507

Hence, the correct option is A) This is not necessarily evidence that the proportion of Americans who are afraid to fly has increased above 0.10 because the probability of obtaining a value equal to or more extreme than the sample proportion is . which is not unusual.

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.