We investigate if a period of time feels longer or shorter when people are bored compared to when they are not bored. Using independent samples, we obtain these estimates of the time period (in minutes):

Sample 1 (bored): X = 14.5, = 10.22, n = 28

Sample 2 (not bored): X = 9.0, = 14.6, n = 34

(a) What are H0 and Ha?
(b) Compute tobt
(c) With ? = .05, what is tcrit?
(d) What should the researcher conclude about this relationship?
(e) Compute the confidence interval for the difference between the ?s.
(f) Using our two approaches, how important is boredom in determining how quickly time seems to pass?

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step-by-step explanation:

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.

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