Choose the correct answer below:

a. increasing the sample size by a factor of 4 increases the standard error by a factor of 2. changing the standard error doubles the magnitude of the standardized z-value.

b. increasing the sample size by a factor of 4 decreases the standard error by a factor of 2. changing the standard error doubles the magnitude of the standardized z-value.

c. increasing the sample size by a factor of 4 decreases the standard error by a factor of 2. changing the standard error decreases the standardized z-value to half of its original value.

d. increasing the sample size by a factor of 4 increases the standard error by a factor of 2. changing the standard error decreases the standardized z-value to half of its original value.

. + λrh() e 1 1 2 4 4 4 4 4 3 4 4 4 4 4 + th−1(− s(x)2 dx ω + λrh−1() e 2 1 2 4 4

step-by-step explanation:

the answer is 1/4

step-by-step explanation:

answer: 0.1,0.85

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.