B. suppose it was previously believed that the mean magnitude of seismic events off the coast of fiji is 4.3 on the richter scale. use the data in the mag variable of the ready-to-use quakes data set, providing 1,000 sampled seismic events in that area, to test the claim that the true mean magnitude is in fact greater than 4.3. set up appropriate hypotheses, use t. test (conduct the test at a significance level of α = 0.01), and draw a conclusion.

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Which of the following represents the length of a diagonal of this trapezoid?

Two groups of students were asked how many hours they spent reading each day. the table below shows the numbers for each group: group a 1 2 1 1 3 3 2 2 3 group b 3 2 3 2 2 2 1 1 2 based on the table, which of the following is true? the interquartile range for group a students is 0.5 less than the interquartile range for group b students. the interquartile range for group a students is equal to the interquartile range for group b students. the interquartile range for group a employees is 0.5 more than to the interquartile range for group b students. the interquartile range for group a employees is 1 more than the interquartile range for group b students.