Acracker manufacturer wants to know how a new cracker she wants to make compares to the competition, so she has people in a sample of supermarkets across the country ask people to compare three crackers: one of her crackers and two competing crackers. this is an example of what kind of statistical study? \

1.experiment
2.observational study
3.survey

I believe the answer would be survey seeing as other people would be trying all three and comparing one to the other two

This is an example of SURVEY.    

Survey can be defined as a method where a lot of information is gathered from a sample of people with respect to a larger population to generalize some result.    

Here, the manufacturer is surveying about the comparison of three crackers by asking people in supermarkets.  

answer:

total cost for tiles and paints is $924.  

step-by-step explanation:

we have been given that a community hall is in the shape of a cuboid. the hall is 40m long 15m high and 3m wide.

the paint will be required for 4 walls and ceiling.

let us find area of walls and ceiling.

therefore, the area of walls and ceiling is 1410 square meters.

given: cost for 10 litre of paint is $10 and 10 litre paint covers 25 square meter. therefore,

therefore, the total painting cost is $564.

tiles will be required for floor. let us find the area of floor.

given: 1m squared floor tiles costs $3. so,

therefore, the total tiles cost is $360.

now let us find combined total cost of tiles and paint.

therefore, the combined total cost of tiles and paint is $924.