26:53 Time Remaining Return Submit O O 20 19 1 point A nurse conducts a study on caregiving in couples among whom one partner has a stroke. They are interested in studying the effects of income (i.e., low, high) and type of employment (i.e., unemployed, part-time employee, full-time employee, self-employed) of caregivers on their ability to care for their partner with a stroke. Which of the statements below is a null hypothesis about a possible main effect? O The effect of employment status on caregiving depends on income level. The effect of employment status on caregiving does not depend on income level. O Income has an effect on caregiving ability. O Income does not have an effect on caregiving ability. 20 1 point