(a) Consider the following data, what data type (i.e, Numeric continuous, Numeric discrete, Categorical ordinal or Categorical nominal) are they?

i)Education level of employees (primary, high school, university

ii)Occupation of the husband in a household (police officer, nurse, civil servant, business person, others)

iii)The number of heads in 100 coin flips

(b) What is the appropriate alternative hypothesis for each of the following statements:

(i) A consumer test agency wants to see the whether the mean lifetime of a brand of tires is less than 42,000 miles. The tire manufacturer advertises that the average lifetime is at least 42,000 miles.

The null hypothesis is H0: = 42,000. Write the alternative hypothesis.

(ii) A political news company believes the national approval rating for the current president has fallen below 40%.

The null hypothesis is H0: p = 0.4. Write the alternative hypothesis.