Sales prices of baseball cards from the 1960s are known topossess a skewed-right distribution with a mean sale price of $5.25and a standard deviation of $2.80. suppose a random sample of 100cards from the 1960s is selected. describe the samplingdistribution for the sample mean sale price of the selectedcards. a. skewed-right with a mean of $5.25 and a standard error of$2.80b. normal with a mean of $5.25 and a standard error of$0.28c. skewed-right with a mean of $5.25 and a standard error of$0.28d. normal with a mean of $5.25 and a standard error of$2.80

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

Is the figure congruent? yes or no?