Set up the matrix equation to solve this system. 2. Given the inequality y < x2 + 2x – 3, is the point (0, -3) part of the solution? Name a point that is part of the solution and one that is not. 3.
Determine the minimum required sample size if you want to be 80% confident that the sample mean is within 2 units of the population mean given sigma = 9.4. Assume the population is normally distributed. 24. A social service worker wants to estimate the true proportion of pregnant teenagers who miss at least one day of school per week on average. The social worker wants to be within 5% of the
Use your models for q 3 and 4 to interpolate and extrapolate data 9. Using the scatterplot in q 3 and 4 construct a three median line of best fit (give the coordinates of the three medians). State the equation of the three median line. Which is more appropriate, the three median line of best fit or the least squares regression line?
The coordinates for 0 radians would be (5,0). The coordinates for /4 radians would be [(square root of 2)/2, (square root of 2)/2]. The coordinates for /2 radians would be (0,5). 5) Consider the two points in Quadrant I on Circle B. What is the special relationship between them?
The diagram below shows the graph of y = –x . 2 y O x (–3, k) y = –x2 The point (–3, k) lies on the graph. Find the value of k. 1 6. C B 12 cm A 1 1 In triangle ABC, AB = 12 centimetres, sin C = 2 and sin B = 3 . Find the length of side AC.
20. You collect employment in a trade business over 60 months and wish to predict employment for the next 12 months. Because there is an overall curvilinear pattern to the data, you use trend analysis and fit a quadratic trend model. Please input the data in MINITAB and save it as EMPLOY2.MTW: , create, copy and submit a Time Series Graph using the following data Trade Food Metals 322 53.5 44.2 317 53.0 44.3 319 53.2 44.4 323 52.5 43.4 327 53.4 42.8 328 56.5 44.3 325 65.3 44.4 326 70.7
1.328 b. 2.539 c. 1.325 d. 2.528 ANSWER: a -go to the t-dtistrubution and use α=0.20 or confidence of 80% and use dof=19 3. Read the t statistic from the table of t distributions and circle the correct answer. A one-tailed test (upper tail), a sample size of 18 at a .05 level of significance t = a. 2.12 b.
3. Be able to conduct a goodness of fit test when the population is hypothesized to have a multinomial probability distribution. 4. For a test of independence, be able to set up a contingency table, determine the observed and expected frequencies, and determine if the two variables are independent. 5.
Candidate Name Centre Number 0 Candidate Number GCSE 185/02 MATHEMATICS (2 Tier) FOUNDATION TIER PAPER 2 P.M. MONDAY, 2 June 2008 2 hours For Examiner’s use only ADDITIONAL MATERIALS A calculator will be required for this paper. Question 1 INSTRUCTIONS TO CANDIDATES Write your name, centre number and candidate number in the spaces at the top of this page. Answer all the questions in the spaces provided. Take π as 3·14 or use the π button on your calculator. 2 3 4 5 6 7 8 INFORMATION FOR CANDIDATES You should give details of your method of solution when appropriate.
They found that participants remembered about 90% when there was only a second interval; but this dropped to 2% when an 18 second interval was emplaced. Thus concluding verbal repetition prevents rehearsal of items being stored in STM decay quickly, so items last approximately 10 seconds in STM without rehearsal. One research conducted by Bahrick et al in America demonstrated the considerable duration of LTM by asking people of various ages to put names to faces from their high school year book. 48 years on people were about 70% accurate. There was a free recall test, photo recognition test and name recognition test.