The average zinc concentration

Assignment Help Basic Statistics

Reference no: EM13253068

The average zinc concentration taken from a sample of zinc measurements in 25different locations is found to be 3.0 ounces per gallon. Find the 95 % confidence interval for the mean zinc concentration in the river. Assume that the population is normally distributed with a standard deviation of 0.2.

Reference no: EM13253068

Questions Cloud

Explain what is the theoretical yield of aluminum oxide : What is the theoretical yield of aluminum oxide if 2.80 mol of aluminum metal is exposed to 2.40 mol of oxygen? Express your answer numerically in moles.

The proportions of republicans and democrats : In a study, 65 % of the 100 Republicans surveyed, favored the bill for a salary increase and 60 %of the 200 Democrats surveyed, favored the same bill for a salary increase. Test whether the proportions of Republicans and Democrats favoring this bi..

Explain what mass of waste brine is expelled in one day : If the desalination plant wants to produce 1400.0 gallons of drinking water per day, how many gallons of brine must the plant take in per day. The density of fresh water is 1.000 g/cm3. The density of brine is 1.025 g/cm3. What mass of waste brine..

Which of following is not a criterion for choice in decision : Which of the following is not a criterion for choice in decision making under uncertainty? a. Equal probabilities (Laplace). b. Pessimistic. c. Coefficient of optimism (Hurwicz). d. Optimistic. e. Maximax regret.

The average zinc concentration : The average zinc concentration taken from a sample of zinc measurements in 25different locations is found to be 3.0 ounces per gallon. Find the 95 % confidence interval for the mean zinc concentration in the river. Assume that the population is no..

Explain decomposing the hydroxide to iron oxide by heating : A student determines the iron(II) content of a solution by first precipitating it as iron(II) hydroxide, and then decomposing the hydroxide to iron(II) oxide by heating.

Determine the rms current in the circuit : A series RLC circuit contains a resistor of 20 ohms, a capacitor of 0.75x10^-6 F, and an inductor of 0.120 H. what is the rms current in the circuit when operating at its resonance frequency

Explain mass percentage of bromine in the original compound : A 0.4564 g sample of a pure soluble bromide compound is dissolved in water, and all of the bromide ion is precipitated as AgBr by the addition of an excess of silver nitrate. The mass of the resulting AgBr is found to be 0.8815 g.

What is the single most positive advantage of group decision : What is the single most positive advantage of group decision making and what is the single most negative aspect of group decision making?

User Account

All Pages