9. The results of a survey involving the use of pajamas while traveling are listed as follows:Erkek KadınToplamİç giyimGecelik0.2200.0240.2440.0020.1800.182Hiçbir şeyPijamaTişörtDiğer0.1600.0180.1780.1020.0730.1750.0460.0880.1340.0840.0030.087a) What is the probability that the passenger sleeping naked is a woman?b) What is the probability that the passenger is a male?c) Assuming the passenger is male, what is the probability of sleeping in pajamas?d) If the passenger sleeps in pajamas or a T-shirt, what is the probability that the passenger is male?

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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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Find the Proportion estimate of the following. 1. n = 625 x = 125 2. n = 50 x = 21 3. n = 118 x = 67 4. n = 1, 137 x = 20 5. n = 2,517 x = 1,007
2. State the type of sample being collected. The quality control officer at a manufacturing plant needs to determine what percentage of items in a batch are defective. The officer chooses every 15th batch off the line and counts the number of defective items in each chosen batch
Indicate whether a census or a sample survey is appropriate or advisable in the following situations. Give a brief reason a. The Mayor of Davao City wants to determine the socioeconomic status of households in Davao City. b. A marketing research group wishes to determine the proportion of television viewers watching Encantadia.
1. Explain the difference between z-tests (which use categorical data), and t-tests (which use numerical data). 2. Conduct a t-test, both when given statistics, and when given data. 3. Conduct a t-test, 2-sample t-test, and paired t-test. 4. Differentiate between the five types of tests we have learned so far.
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How many days were 20 up to 25 packages shipped? What is the relative frequency of days in the 20 up to 25 class? Note: Round your answer to 2 decimal places. What is the midpoint of the 15 up to 20 class? Note: Round your answer to 1 decimal place. On how many days were there 10 or more packages shipped?
The number of small diameter trees in a forest is of interest to a a private logging company. In order to determine the representative number of small diameter trees, the company is most likely to 1. take a sample nearest to the edge of the forest 2. take samples at different locations on the forest 3. tag all the the small diameter trees in the forest 4. take a census 5. take a sample in the middle of the forest
City Time (minutes) Rome 24.9 Milan 26.8 Naples 26.2 Turin 28.1 Palermo 31.7 Genoa 25.8 Bologna 23.3 Florence 32.1 Bari 28.5 Catania 24.4 Verona 29.3 Venice 24.8 Messina 38.1 Padua 28.3 Trieste 28.4 Taranto 24.6 Prato 20.1 Modena 23.4 a) What is the mean commute time for these 18 cities? b) What is the median commute time for these 18 cities? c) What is the mode for these 18 cities? d) What is the variance and standard deviation of commute times for these 18 cities? e) Find the z – score value of commute time for these 18 cities. f) Find 28th and 77th Percentile of commute times for these 18 cities.
3.What levelof measurement –nominal, ordinal, interval, or ratio –do the following represent and WHY?a. number ofwebsites visited each dayb. 20% strongly agreed, 13% agreed, 5% disagreed, ..
18. The governor of New York has banned selling or purchasing "large" soft drinks, where a "large" is defined as being more than 16 oz. Sonic, famous for its Route 44 drinks is interested in estimating the proportion of New Yorkers that favor this ban. From a random survey of 800 New Yorkers, 375 answered no to the question, “Do you favor the governor's ban on 'large' soft drinks?" a. Find a 97.5% confidence interval for the proportion of New Yorkers who favor the ban on "large" soft drinks. b. Interpret the confidence interval. c. Can you conclude with 97.5% confidence that a majority of New Yorkers favor the ban on "large" soft drinks? Why or why not. d. Without doing any other calculations, can you be 99% confident that a majority of New Yorkers favor the ban on “large" soft drinks?
8.
1. A researcher is interested in the texting habits of high schools students in the United States. The researcher selects a group of 200 students, measures the number of text messages that each individual sends each day (for a single week), and calculates the average number for the group. a. Identify the population for the study. b. Identify the sample for this study. c. The average number calculated is an example of what?

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