A psychologist would like to examine the effects of different testing methods on the final performance of college students. One group has regular quizzes, one group has three large exams, and the third group only has a final exam. At the end of the course, the psychologist interviews each student to get a measure of the student's overall knowledge of the material. Quizzes Exams Final Only 410 642 G = 36 %3D 350 ΣΧ2 = 164 %3D 722 T= 20 T = 12 T = 4 SS = 10 SS = 10 SS = 4 1. Do the data indicate any significant differences among the three methods? Test with a = .05. Show all calculations (i.e., SS, df, MS and F) a. State the research hypotheses b. Identify the critical value c. Calculate the test statistic d. Evaluate the null hypothesis

Unit 3 Test Part 1 ATAYAH Name: Date: Unit 3 Test Part 1 after Lesson 9 Directions: Make sure you have work shown for EVERY question to get full credit. 1. Pat bounces a basketball 25 times in 30 seconds. At that rate, approximately how many times RP.A.3 will Pat bounce the ball in 150 seconds? А. 120 В. 125 С. 144 D. 145

6 © 64%O A noblesville.instructure.com Question 1 1 pts A mathematician is vacationing in Italy and is viewing the Leaning Tower of Pisa. The man is standing 24 feet from the middle of the base of the tower. He is slightly down hill and estimates that he is standing on the line that is perpendicular to the tilt of the tower. The tower is 195.5 feet tall.What is the angle of elevation from his eyes to the top of the tower? O 23.8° 2.9°

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Length of a rod: Engineers on the Bay Bridge are measuring tower rods to find out if any rods have been corroded from salt water. There are rods on the east and west sides of the bridge span. One engineer plans to measure the length of an eastern rod 25 times and then calculate the average of the 25 measurements to estimate the true length of the eastern rod. A different engineer plans to measure the length of a western rod 20 times and then calculate the average of the 20 measurements to estimate the true length of the western rod. Suppose the engineer who collected 25 measurements for the eastern rod has a mean length of 23.9 feet with a standard deviation of 0.5 feet. The critical T-value for a 90% (one-sample) confidence interval with df = 24 is T=1.71. Which of the following is the resulting 90% confidence interval?  (23.73 , 24.07)  (23.05, 24.76)  (23.80, 24.00)

The Boardman family walked 2/5 of a mile in 2/7 of an hour. What is their unit rate in miles pro hour?

The first Batman movie was made over 50 years ago in 1966. Över the years, Batman has been played on screen by a number of actors and even by a Lego figure in the Lego Batman movies. In the original comic books, Batman was 188 centimeters tall (about 6'2") and weighed 95 kilograms (about 210 pounds). The article "50 Years of Batman on Film: How Has His Physique Changed?"t included the heights and weights of all of the onscreen Batmen in the table below. Batman Height (cm) Weight (kg) Comic book 188 95 Lego Batman 4 0.005 Adam West 188 91 Michael Keaton 178 72 Val Kilmer 183 93 George Clooney 180 78 Christian Bale 183 82 Ben Affleck 193 98 A USE SALT With x = height and y = weight, the equation of the least squares regression line is ŷ = -3.0112 + 0.4881x. %D (a) Calculate the residuals. (Round your answers to two decimal places.)

You think your car’s fuel efficiency is much lower than it should be. The average fuel efficiency of your car that the car manufacturer claim is 27 mpg. Your car’s fuel efficiency is 22 mpg. A). z-test or t-test, and why?B). What is the H1 and H0?

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PC NA 2 pdf Open w th - STAAR Category 3 Grade 8 Mathematics TEKS 8.70 8.7C Mini-Assessment 2 1. An 8-foot piece of metal is leaning against the wall of a garage. The bottom of the piece of metal is 4 feet from the base of the wall. 8 ft x ft 14 ft Which best describes how high up the wall of the garage it is the top of the piece of metal? A 4 feet B A few inches less than 7 feet C A few inches more than 7 feet D A few inches less than 9 feet Page 1 / 5 Q + Co %23 %24 & 2 4. 5 7 e r y g. di