A trainer was asked to give a lecture on population profiles in different Local Authorities (LAs) in the UK Using data from the 2011 census, he created the following scatter diagram for 17 selected LAs. 17 Selected Local Authorities 0.25- 0.- 0.15- 0.1- 0.05- 0+ 0.b5 o.1 o.1s 02 0.25 03 0.35 Proportion aged 65+ He selected the 17 LAs using the following method. The proportions of people aged 18 to 24 and aged 65+ in any Local Authority are denoted by Proung and Pnior respectively. The trainer used a spreadsheet to calculate the value of k = for each of the 348 LAs in the UK. He then used specific ranges of values of k to select the 17 LAs. (a) Estimate the ranges of values of k that he used to select these 17 LAs. (b) Using the 17 LAs the trainer carried out a hypothesis test with the following hypotheses. and P H: There is no linear correlation in the population between Pyoung H: There is negative linear correlation in the population between P young and P senior senior He found that the value of Pearson's product-moment correlation coefficient for the 17 LAS is -0.797, correct to 3 significant figures. ) Use the table on page 9 to show that this value is significant at the 1% level. The trainer concluded that there is evidence of negative linear correlation between P, Penior in the population. and young (ii) Use the diagram to comment on the reliability of this conclusion Proportion aged 18 to 24

Data was collected for 322 randomly selected 10 minute intervals. For each ten-minute interval, the number of people entering the atrium of a large mall were recorded. The data is summarized in the table below. Number  of Guests      Frequency    220 – 224 98 225 – 229 81 230 – 234 36 235 – 239 63 240 – 244 44 What is the class width for this GFDT?Class width =

Determine the sample in this research scenario: Dr. Eglovitch wants to know whether type of exercise, running or yoga, improves post-partum depression. One hundred women are recruited from obstetricians’ offices in the Richmond area.   Group of answer choices A.100 postpartum women whose depression was measured B.Type of exercise C. Postpartum depression D. All postpartum women

Please help explaining how to answer so I can study for my test. The Farm Program for the Montana State Department of Agriculture needs to choose a sample of farms in order to collect information about land utilization. Montana has 56 counties and the 26,800 farms across the state are currently categorized by county. The program would like to select a random sample of at least 112 farms and record the total acreage and the acreage used for pasture and range for each farm in the sample. Two plans have been proposed: Plan A: The program will randomly select 10 counties from the 56 counties. All farms within the 10 selected counties will be visited by a surveyor who will calculate the total acreage and acreage used for pasture and range. Plan B: The program will randomly select 2 farms from each county. All 112 selected farms will be visited by a surveyor who will calculate the total acreage and acreage used for pasture and range. Which of the following best describes the…