Use the following information to answer the next two exercises. An article from the San Jose Mercury News was concemedwith the racial mix of the 1,500 students at Prospect High School in Saratoga, CA. The table summarizes the results. Maleand female values are approximate. Suppose one Prospect High School student is randomly selected.Gender/Ethnic Group White Asian Hispanic Black American IndianMaleFemale46811540035164401321404014Table A212. Find the probability that a student is Asian or male.13. Find the probability that a student is black given that the student is female.

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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...

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A city has 4 voting districts. Records from previous years show the proportion of registered voters that voted in previous elections for each district. A political analyst wants to see if those proportions have changed for this year's upcoming elections. The political analyst randomly samples 123 registered voters and asks them which district they live in and if they have voted yet. H0: Pa = 0.3: Pb = 0.2; Pc = 0.2; Pd = 0.3 Test the claim that there is a difference in the proportions using a α =0.01. Round all answers to at least 4 decimal places. a.) Complete the table: District: A, B, C, D; Observed: 36, 32, 19, 36 ( Respectively, matching Category Letters. Total of Observed: 123) b.) What is the chi-square test-statistic for this data? X 2=______ c. For significance level alpha , what is the chi-square Critical Value? Critical Value = _________________ d. What would be the correct conclusion for this hypothesis test?
I need help with this one please thank you.
The number of cancer cases by smoking status is shown in below table is a sample of randomly selected individuals. These figures will give an odds ratio of: Smoking status Smoker Non-smoker Lung cancer With cancer Without cancer 40 25 20 20 50
What percent of females thought that they were almost certain to be married in the next 10 years?
You want to examine the relationship between dropping out of high school and delinquency. You have a random sample of 11 students. You have the number of delinquent offenses that each student reported committing in the year before and after dropping out of school. The following table shows the data. Student Before dropping out After dropping out 1 5 7 2 9 5 3 2 3 4 7 7 5 8 11 6 11 13 7 8 4 8 8 10 9 5 7 10 2 1 11 9 3 From performing a hypothesis test to determine if the mean number of delinquent differs after dropping out, what is the obtained t?
A student must have a B average or better for all courses to qualify for any athletic team at Jefferson High School. The table below shows the distribution of students' grades in three sports at the school. Students with Students with a Sport an A Average B Average Field hockey 15 4 Basketball 7 13 Football 2 22
The top 16 winning scores for NFL games are listed below. Find the mean score. Video Tutorial: How to find the mean on a TI-84 72 54 52 54 70 51 56 58 58 52 51 63 51 48 52 61 A. 54 B. 57.1 C. 63.2 D. 56.4
An instructor in a statistics course set a final exami- nation and also required the students to do a data analysis project. For a random sample of 10 students, the scores obtained are shown in the table. Find the sample correlation between the examination and proj- ect scores. Examination 81 62 74 78 93 69 72 83 90 84 Project 76 71 69 76 87 62 80 75 92 79
The home run percentage is the number of home runs per 100 times at bat. A random sample of 43 professional baseball players gave the following data for home run percentages.
The following data lists the ages of a random selection of actresses when they won an award in the category of Best Actress, along with the ages of actors when they won in the category of Best Actor. The ages are matched according to the year that the awards were presented. Complete parts (a) and (b) below. Actress (years) 26 Actor (years) 26 32 28 38 29 29 45 27 31 D 60 37 40 40 28 36 50 35 41 43 a. Use the sample data with a 0.01 significance level to test the claim that for the population of ages of Best Actresses and Best Actors, the differences have a mean less than 0 (indicating that the Best Actresses are generally younger than Best Actors). In this example, Hd is the mean value of the differences d for the population of all pairs of data, where each individual difference d is defined as the actress's age minus the actor's age. What are the null and alternative hypotheses for the hypothesis test? Ho: Ha year(s) year(s) (Type integers or decimals. Do not round.)
What is the variance for the following set of scores: 2, 2, 2, 2, 2. A. 0 B. 2 C. 4 D. 25

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