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A student scored 78 on an exam where the class mean was 70 and the standard deviation was 8. What is this student’s z-score?

A dataset of employee salaries has a mean of $52{,}000 and a median of $45{,}000. What does this suggest about the shape of the distribution?

True or False: A parameter is a numerical measurement that describes a characteristic of a sample.

A call center receives an average of 3 calls per minute. Which probability distribution is most appropriate to model the number of calls received in any given minute?

Which of the following is the BEST graph type to display the distribution shape of a quantitative variable?

 Calculate the pH in which [H3O+] = 3.1×10-11 M.

Calculate the amount of heat required to raise the temperature of a 40.0 g sample of water from 7.0 oC to 29.0 oC. The specific heat of water is 4.184 J/g °C. 

What is the concentration of hydroxide ions in an aqueous solution containing [H+] = 1 × 10−5 M?

What is the room number for this class?

What is the molarity of sodium chloride in a solution made by dissolving 12.2 g of KCl in enough water to make a 0.500 L solution?