Dr. Nguyen conducts a study to examine the hypothesis that exercising in the morning increases subjective well-being. In this study, the null hypothesis is that there is/are . Group of answer choices no relationship between the time of day individuals exercise and subjective well-being a relationship between the time of day individuals exercise and subjective well-being physical exercise leads to subjective well-being physical exercise does not lead to subjective well-being

Which statement best describes evidence of a mulitcultural mix in east africa? a. because of what he learned during his pilgrimage to mecca, mansa musa was able to build a center of islamic scholarship. b. the traders of ghana brought back with them slaves from the mediterranean who taught the ghana rulers about christianity. c. clans were made up of lineages that were descendants of multiple ancestors from different regions of africa. d. swahili became a language made up of words spoken by traders along the coast of the indian ocean.