Consider the stem and leaf diagram below showing the numerical grade awarded (out of 350) to the students Stem-and Leaf of GradeAwarded N = z Leaf Unit = 10 5 0 12223 14 0 44555588 y 1 0001122233 (x) 1 55555556667889 12 2 12 2 666677777 3 3 234 What is the value of y

A study was carried out to determine the influence of a trace elementfound in soil on the yield of potato plants grown in that soil, defined asthe weight of potatoes produced at the end of the season. A large fieldwas divided up into 14 smaller sections for this experiment. For eachsection, the experimenter recorded the amount of the trace elementfound (in milligrams per metre squared) and the corresponding weightof the potatoes produced (in kilograms). This information is presentedin the worksheet ‘Dataset5’ in the Excel document. Define X as thetrace element amount and Y as the yield.1. Draw a scatterplot of your data set.Page 52. Calculate the coefficients of a linear equation to predict the yieldY as a function of X.3. Calculate the correlation coefficient for the paired data values.4. Set up the framework for an appropriate statistical test to establish if there is a correlation between the amount of the trace element and the yield. Explain how having the scatterplot referredto…

The monthly salaries of a sample of 500 employees were rounded to the nearest R10 rand notes. They ranged from a low of R2999 to a high of R4250. If we want to condense the data into ten class intervals, what is the most convenient class width (rounded off to zero decimals)? ⒸA. 50 B. 10 C. 125 D. 90

In a student survey, forty-one part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below: Please round your answer to 4 decimal places for the Relative Frequency if possible. # of Courses Frequency Relative Frequency Cumulative Frequency 1 15 0.3659 15 2 12 0.2927   ? 3   ?    ? 41  What percent of students take exactly one courses          ? %