Enter you answer for the midquartile of the data.  Round (if necessary) to the tenths place.45, 33, 51, 39, 57, 53, 31, 58, 43, 35, 53

Chebyshev’s theorem states that approximately 90% of entries will fall within three standard deviations above and below the mean.   Give just the upper value that defines this interval.  Round your answer to the ones place.

A biochemist wants to make [x] mL of a lobster blood solution by adding distilled water to [y] mL of a [z] M lobster blood stock solution. What is the concentration of their new lobster blood solution in mM?

Enter your answer for Quartile 3 of the data set.45, 33, 51, 39, 57, 53, 31, 58, 43, 35, 53                                       

Find the 95% confidence interval for the standard deviation of the weight of ten-gallon drums of motor oil:if a sample size of 20 of these drums had a variance of 3.2 ounces.For question 17, give the table value you are going to use in your set up for Chi-squared right. For question 18, give the table value you are going to use in your set up for Chi-squared left.For question 19, give the highest value of your calculated standard deviation of the 95% confidence interval. (Hint/reminder: Chi-squared tables use degrees of freedom)

A 3.82-g sample of magnesium nitride is reacted with 7.73 g of water:             Mg3N2 + 3H2O → 2NH3 + 3MgO The yield of MgO is 3.60 g. What is the percent yield in the reaction?

The combustion of ammonia in the presence of oxygen yields NO2 and H2O:             4 NH3 (g) + 7 O2 (g) → 4 NO2 (g) + 6 H2O (g)  The combustion of 43.9 g of ammonia with 258 g of oxygen produces ________ g of NO2.

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO (s) + H2O (l) → Ca(OH)2 (s) In a particular experiment, a 4.00-g sample of CaO is reacted with excess water and 4.79 g of Ca(OH)2 is recovered. What is the percent yield in this experiment?

Give your calculated answer for the highest value of the standard deviation of the 95th confidence interval. Round your answer to the tenths place. (See question 17).

Note:  Questions 20-25 are drawn from concepts introduced in Ch 6.  You will be using the z-tables for these questions. Remember how helpful it can be to sketch and label a bell curve for each situation.A recent study of teacher salaries in rural areas showed that the average salary was $31,950 a year with a standard deviation of $1400. For question 20, if one teacher is chosen at random, find the probability that this teacher earns more than $32,500 a year. Express your answer as a decimal.  Recall the importance in using a bell curve sketch for this type of question.