A group of students and a group of senior citizens were asked to consider seven yellow paint shades and rank them in order of preference. Parker's IT recruitment services hold regular interview days where candidates are required to undergo an interview and an IT aptitude test.
Calculate a suitable correlation coefficient and use this to comment on the level of agreement between the interview and testing process. Calculate a linear regression model which describes the relationship between weight loss and amount of aerobic exercise.
A transport company has provided the following data relating to a sample of journeys made, giving distance travelled and time taken.
A supermarket chain is about to launch its own range of batteries and wishes to base its marketing on a campaign emphasizing that the price of a battery is not the most important factor in determining its reliability. Because your shoulders and upper back tend to have less body fat compared to other areas of the body, you’ll get the toned, defined look you’re working for much more easily.
Twelve of the established club members have carefully recorded the number of minutes of aerobic exercise they have undertaken in one week along with their weekly calorie intake. Describe the main features of the graphs and hence estimate possible correlation coefficients. Using this figure, calculate the coefficient of determination and define its meaning in this context.
By comparing this with the correlation coefficient found in (b) determine which of the two factors is the better contributor to weight loss, giving appropriate reasons for your choice. Use this equation to predict the expected weight loss of a club member who has undertaken 150 minutes of aerobic exercise in the week.
The company is interested in developing a model to predict time taken for a journey if distance to be travelled is known.
A sample of 50 batteries of various ages bought at varying prices have been tested (each under the same conditions) to see how long they would last.
Your hands should be positioned under shoulders; and your feet slightly wider than hip-width apart.
If you experience any pain, weakness, unsteadiness, light-headedness or dizziness, chest pain or pressure, nausea, or shortness of breath that is a sign that you need to stop and consult your medical professional of choice. It is up to you how much rest you need between exercises, but I suggest 30 seconds or less.
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