Math
below are the data collected from two random samples of 500 american adults on the number of hours they spend doing leisure and sports activities per day (rounded to the nearest hour):

dan concludes that adults spend a mean of 3 hours each day doing leisure and sports activities. bret thinks the mean is 4 hours. who is correct—dan or bret? explain your answer in two or three sentences. make sure to use facts to support your answer.

Ok so lets find the total amount of hours spent by all the adults according to Sample A: 1 x 70 + 2 x 90 + 3 x 135 + 4 x 140 + 5 x 65 = 70 + 180 + 405 + 560 + 325 = 1540 So, according to Sample A, the average hours spent each day by one adult doing leisure and sports is 1540/500 = 3.08. Now let's find the total amount of hours spent by all the adults according to Sample B: 1 x 80 + 2 x 80 + 3 x 130 + 4 x 135 + 5bx 75 = 80 + 160 + 390 + 375 = 1545 So, according to Sample B, the average hours spent each day by one adult doing leisure and sports is 1545 / 500 = 3.09. So, Dan is absolutely correct by assuming that adults spend a mean of 3 hours each day doing leisure and sport activities.

sry if it has spelling errors or i dont make sense

definition: a circle is the  set of all points in a plane that are equidistant  from a given  point  called the center of the circle. we use the symbol ⊙ to represent a circle. the a line segment from the center of the circle to  any point  on the circle is a radius of the circle.

step-by-step explanation:

i googled it and this is what i got i don't know how it is. sorry.

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.