According to the National Sleep Foundation, teenagers need about 9 hours of sleep each night to function at their best. Unfortunately, many teens do not get nearly this amount. Two samples of 100 teenagers were asked about the average number of hours they sleep each school night. The results are recorded in the table below. < 4 4 - 6 6 - 8 8 - 10 10 +
Sample #1 2 9 39 44 6
Sample #2 1 12 34 48 5
Based on the results of the survey, which of the following inferences are valid?

Adults need less sleep than teenagers.
About half of teenagers get less than 8 hours of sleep each school night.
At least 10% of teenagers have sleep-related issues, such as depression, insomnia, and drowsiness during the day.
Half of teenagers get the recommended 9 hours of sleep each school night.
More than 90% of teenagers get between 4 and 10 hours of sleep each school night.

select all that aplay

5/6+7/8what is the answer sealsdbdbshd

Ascientist studied a population of workers to determine whether verbal praise and/or tangible rewards affect employee productivity. in the study, some workers were offered verbal praise, some were offered tangible rewards (gift cards, presents, and some were offered neither. the productivity of each participant was measured throughout the study by recording the number of daily tasks completed by each employee. which inference might the scientists make based on the given information? a.) the number of daily tasks completed by each employee may influence the dependent variable, which is whether the employee receives verbal praise, tangible rewards, or neither. b.) verbal praise and/or tangible rewards may influence the independent variable, which is the number of daily tasks completed by each employee. c.) verbal praise and/or tangible rewards may influence the dependent variable, which is the number of daily tasks completed by each employee. d.) the dependent variables, which are verbal praise and tangible rewards, may influence the number of daily tasks completed by each employee.

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.