Kelly has some sand in a bucket, but she thinks that there may be some salt mixed in with her sand. how can she determine if there is salt in the sand? a. if she leaves the bucket alone the salt will rise to the top. b. if she puts water in the bucket, the sand will dissolve. c. if she puts water in the bucket, the salt will dissolve. d. if she evaporates the sand the salt will be left behind.

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.