STAT PRACTICE WORK APRIL 5

There is no significant difference between the average weekly allowances of morning and afternoon pupils in Mapayapa Elementary School.

• alternative ; directional

• alternative ; nondirectional

• null

The proportion of patients with heart diseases is higher among smokers than nonsmokers.

• alternative ; directional

• alternative ; nondirectional

• null

A modern approach in advertisement will not increase the demand for a product.

• alternative ; directional

• alternative ; nondirectional

• null

The introduction of modern computers affects the performance of the students.

• alternative ; directional

• alternative ; nondirectional

• null

The average income of families in Barangay Maalat is Php12, 000.00

• alternative ; directional

• alternative ; nondirectional

• null

The proportion of graduates in a university majoring in Mathematics is more than 10% of the entire population.

• alternative ; directional

• alternative ; nondirectional

• null

The weight of the average 6th grade student's backpack (with books in it) is 18.4 lbs. The principal of the school thinks that the backpack does not weight 18.4 lbs. What is the null and alternate hypothesis? 

• H₀ = 18.4
  H_a = 18.4
• H₀ = 18.4
  H_a > 18.4
• H₀ = 18.4
  H_a < 18.4
• H₀ = 18.4
  H_a ≠ 18.4

A car manufacturer advertises that its new subcompact models get 47 mpg. If μ is the mileage of these cars, what could be the null and alternate hypothesis if we wanted to check if the car's mpg is overrated? 

• H₀ = 47
  H_a = 47
• H₀ = 47
  H_a < 47
• H₀ = 47
  H_a > 47
• H₀ = 47
  H_a ≠ 47

In a hypothesis test, the alternative hypothesis is always a statement of equality. 

• True
• False

The null and alternative hypothesis can be the same.

• Yes

• No

• Maybe

• All the above