please help.I need help with 2 problems I need help seeing every step of the pro

Question

please help.I need help with 2 problems I need help seeing every step of the problem. problem 1 I need help with a,b and d

problem #2

for problem #2 the top portions say. For 12 months, a store owner recorded the number of times consumers bought widgets at her shop. She called the number sold and demand. Each month, the owner also recorded the widgets price in cents. The price and demand for the widgets for each month are given in the following table. In this problem I need help determine the relationship between price and demand using the Pearson r and the Spearman r methods(i.e. compute both r and rs) treat price as X and demand as y .

ber). Should he automatically assume that there is relation between the two variables (r is a very small m- tudents. KoBer tinds no the two variables? What would you recommend determine whether the correlation between the timate of the true relation between matically assume that there is no relation between you recommend that he do in order to two variables is a fair es- the two variables? 5. Each of the following examples represents an opportunity to examine identify and years ofetween arth, ow the darexampley to examin. llected, the in- from 1 resents an op examplei ected, the ia- the correlation between two variables. For each example, describe the potential problems with how the data are co terpretation of the results, or both. a year to sep betwcen ape and reaction tine for shbjets trom year to 65 years of age. university dren in an economically disadvantaged community men and women between the ages of 18 and 35. D: The correlation between 1O and grades for honor students at a large c. The correlation between vocabulary and reading speed among chil- d. The correlation between years of education and annual income for s is hased on a correlation between two

Explanation / Answer

1.

a) the data must be collected from the sublects by asking them about the reaction time.

There may be a positive ornegative ralation between the reaction times and age of the subject

b) Collect data about the IQ of only the honor students of the university. The relation between Iq and honour students will be positive

d) Collect data from the persons aged between 18 and 35 about their education and earnings.

The correlation between education and earnings will be positive

2. Pearson correlation coefficient is -0.95364, i.e storng negative correlation exists between price and demand

spearman's correlation coefficine is 0.674242

referr the following excel sheet for calculations

50 25 12 1 121 90 10 1 12 121 80 12 3.5 10 42.25 75 18 6 4.5 2.25 85 11 2 11 81 70 20 10.5 2 72.25 80 13 3.5 9 30.25 70 19 10.5 3 56.25 72 18 9 4.5 20.25 74 16 8 6 4 75 15 6 7.5 2.25 75 15 6 7.5 2.25 Pearson's coefficient -0.95364 555 559 0.325758 Spearman's coefficient 0.674242

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.