Asample of 25 cereal boxes of granola crunch, a generic brand of cereal, yields a mean (x¯) weight of 1.02 pounds. the goal is to construct a 95% confidence interval for the mean weight (µ) of all cereal boxes of granola crunch. assume that the weight of cereal boxes is normally distributed with a population standard deviation (σ) of 0.03 pounds.

1.01 < µ < 1.03

Step-by-step explanation:

We want to construct a 95% confidence interval.  Our sample size is 25, so we use a t-value.  The degrees of freedom are 24 (always one less than the sample size).  

The t-value we get is:  2.064

We have:

x = 1.02

σ = 0.03

See the attached photo for the construction of the confidence interval...

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.

answer: c. im 100 percent sure

step-by-step explanation: