Frequency Forty four rats were trained to run a maze. The following frequency histogram presents the number of trials it took each rat to learn the maze. Number of Trials

Use Polya's four-step problem-solving strategy and the problem-solving procedures presented in this section to solve the following exercise. There are 369 first-grade students in Park Elementary School. If there are 23 more girls than boys, how many girls are there? x girls

An assembly line consists of 26 tasks grouped into 7 workstations. The sum of the 26 task times is 153 minutes. The largest assigned cycle time is 24 minutes. The efficiency of this line is O A. 85.00%. O B. 91.07% O C. 52.46% O D. 3.43% O E. 6.38%

Mrs. Smith has 6 activity tables she wants to line up side by side in her classroom. (a) In how many ways can she arrange all 6 tables? Show your work.(b) If she only wants to have 4 of the tables set up, in how many ways can she choose the tables shewishes to have set up? Show your work. Answer:

A shoe company wants to test an updated model of a running shoe on its wear after one month of running. Which of the following describes a matched pairs design? They recruit 50 people who run on a regular basis to participate in their study. They will have the runners wear the shoes when they run for two months. After two O The subjects are numbered 1-50, and these numbers are put into a random number generator. The first 25 random numbers, ignoring repeats, represent the subjects assigned to the new model group. The remaining 25 subjects will wear the original model. months, the wear on the shoes will be determined using the depth of the tread and flexibility of the toe box. The wear between the new model and the original model will then be compared. The subjects' names are written on equal-sized slips of paper and placed into a hat. A researcher then reaches in and pulls out 25 slips of paper. These subjects are assigned to the new model group. The remaining 25 subjects will be…

How many combinations of k=5 screws is it possible to construct from n=8 different screws?  What is the number of combinations of screws?