3. The supply department has 8 different electric motors and five different starting switches. In how many ways can 2 motors and 2 switches be selected for an experiment concerning a tracking antenna?

3. The supply department has 8 different electric motors and five different starting switches. In how many ways can 2 motors and 2 switches be selected for an experiment concerning a tracking antenna?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

2. In NU- SHS, there are 4500 bonafide senior high school students. I want to sample n students and want all the Strands appropriately represented. How many should I ask in each year level? Year level Frequency Strata HUMSS 890 АВМ 1050 STEM 1080 Health Science 1020 GAS 460 Total 4500
21. 1000 students were asked which modes of communication they use – email, text, or Facebook (messenger). These were the results: 830 use Facebook 680 use text 625 use email 600 use both Facebook and text 550 use both Facebook and email 350 use all three 40 use email only Question: How many use Facebook only, text only, both text and email, but not facebook, facebook and email, and does not use any of the three?
A researcher studies the effects of guilt on memory. First, subjects perform a very boring task for one hour. Then each subject is instructed to tell the next subject either (a) that the experiment took one hour and they found it very boring, or (b) that the experiment took one hour and was very interesting. After that, each subject is asked to study a list of words and are tested on memory for the list. 30 subjects are randomly assigned to one of the two conditions. In order to see whether the experimental manipulation has any effect on memory, which would be the proper statistical test? A)a related sample t-test-test   B)an independent sample t-test   C)a z test   D)a one sample t
When testing for current in a cable with twelve color-coded wires, the author used a meter to test two wires at a time. How many different tests are required for every possible pairing of two wires? The number of tests required is
When testing for current in a cable with eleven color-coded wires, the author used a meter to test five wires at a time. How many different tests are required for every possible pairing of five wires? The number of tests required is
The following are the scores of 8 students each in a 25-item mathematics quiz administered in two sections of a certain University in Pangasinan. Section A: 18, 19, 20, 15, 22, 13, 18, 12 Section B: 19, 24, 11, 10, 17, 16, 25, 15 What conclusions can you make on these scores?
Q.no.4 The test scores on the same algebra test were recorded for nine students randomly selected from a classroom taught by teacher A and eight students randomly selected from a classroom taught by Teacher B. Teacher A: 65, 88, 93, 95, 80, 76, 79, 77.Teacher B: 91, 85, 70, 82, 92, 68, 86, 87, 75. Test the hypothesis that the difference in the average scores for students taught by these two teachers equal to zero. Use 5% level of significance.
12. An eye doctor keeps track of whether people who come in for testing need glasses. When she separates them by eye color, she gets the following: Glasses No Glasses Brown 43 55 Blue 34 19 Can we say that eye color is independent of the need for glasses? (a = .01)
3B.3.3 Please refer to the attached image for my question!
250 adults are practicing every day before taking part in a high-stakes children's game. The game requires them carefully to remove a shape- either a star or an umbrella-from a sugar wafer. 30% of those who choose stars on a given day will switch to umbrellas the next day, and 20% of those who choose umbrellas on a given day will switch to stars the next day. (a) If 150 contestants practice with stars today, how many will practice with umbrellas tomorrow? (b) If the actual game is held a long time from now, what proportion of contestants do we expect will be practicing with stars each day close to then?
7. Many businesses have music piped into the work areas to improve the environment. At a company an experiment is performed to compare different types of music. Three types of music - country, rock, and classical – are tried, each on four randomly selected days. Each day the productivity, measured by the number of items produced, is recorded. The results appear below: Country Rock Classical 857 791 824 801 753 847 795 781 881 842 776 865 1.1. Is there a significant difference between the three types of music? Use a =.05. 7.2 Solve using Analysis of Variance. 7.3 Which type of music seem to be best? 7.4 Which type of music seem to be worst?
2. Suppose we want to test whether Canadiansand American viewers have the same reaction to acertain documentary film. A random sample of 6Canadians and 7 American viewers werecollected. Each are asked to watch and then ratethe film, from 1 (most negatively), to 10 (mostpositively). The data are shown on theaccompanying table:Canadians 2 10 1 4 6 1Americans 4 7 7 5 5 3 8a. Explain why we cannot test for the equality of means. That is, we cannot test Ho: Average rating among Canadians is equal to average rating among Americans. b. Use Wilcoxon Rank Sum procedure to test whether Canadians and Americans tend to rate the film similarly. Include the test statistic. State your conclusion in the context of the problem. Use the 10% significance level. c. Use Normal distribution to approximate the p-value. Would you recommend using it to carry out the test instead of the table?