a. First check the assumptions:1. The samples are independent samples taken from two or more populations (0-29 WLM, 30-89 WLM, 90-120 WLM). Weassume these samples are simple random samples.2. Each outcome falls into exactly one of several categories (Yes/No) with the categories being the same in all treatmentpopulations.3. Now check if the third requirement is satisfied:O The expected frequency for each cell is greater than 5, therefore the requirements for a x? test are satisfied.O The expected frequency for at least one cell is less than 5 , therefore the requirements for a x? test are not satisfied.We don't need to check the expected frequency of cells for the requirements for a x? test.The minimum observed frequency for each cell is greater than 5, therefore the requirements for a x? test aresatisfied. 1. The incidence of cancer among phosphate mine workers and their exposure to radiation was investigated. Cancerincidence was recorded among 60 phosphate mine workers who had 0-29 working level months (WLM) of exposure, 60phosphate mine workers who had 30-89 WLM of exposure, and 60 phosphate mine workers who had 90-120 WLM ofexposure. The number of cancer incidences for each group are presented in Table 1.Table 1: Two-way Table of CountsCancer IncidenceExposure LevelYesNoTotal0-29 WLM20406030-89 WLM33276090-120 WLM431760Total9684180Perform a x? test, at the 5% level of significance, whether cancer incidence rates differ between the three levels ofradiation among phosphate mine workers.

Answered: Image /qna-images/answer/f71aa4f8-df26-438f-8a26-404bdbaf876d.jpg

Answered: 1. The incidence of cancer among…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The foundation of a building is designed to be supported by 100 piles with a capacity of 80 tons each. 9 pilesdriven into the ground layers supported at the Ras tgele points were loaded until migration occurred in each pile and the results given in the table below were obtained. Test Pile Pile Capacity (tons) 1 90 2 75 3 95 4 90 5 88 6 92 7 78 8 85 9 88 a) Calculate the average and standard deviation for the individual pile capacity to be used in construction. b) At a 5% significance level, based on the results of 9 test piles, are the manufactured piles acceptable? The zero hypothesis would indicate that the average pile capacity is 80 tons. Determine the 95% confidence interval for the average pile capacity. c) d) Repeat the calculations you made manually above withR. Provide the R code and its result separately as the answer to this option.
The ages of the 36 millionaires sampled are arranged in increasing order in the following table. 31, 37, 39, 39, 42, 42, 45, 47, 4848, 48, 52, 52, 53, 54, 54, 57, 5960, 61, 64, 64, 66, 66, 67, 68, 6869, 71, 71, 74, 75, 77, 79, 79, 79 a. Find and interpret the five-number summary.b. Identify potential outliers, if any.c. Construct and interpret a box plot.
10. The most common species of sweat bees are green, red, and yellow. For each color, we select a sample of 100 of bees of this color and record their length (in inches). We then create 3 data sets of 100 observations each, called "green", "red" and "yellow". Below are the boxplots and histograms for these data sets. The labels of the variables are missing from the histograms, but are included in the boxplots. Our task is to identify the missing labels. Which one of the following statements is correct? HAE 1141 (a) green (b) red (c) yellow 00 0.5 1.0 1.5 2.0 0.5 1.0 1.5 20 0.0 05 1.0 1.5 (d) (e) (f) A) Histogram (d) is for green, (e) is for red, and (f) is for yellow. B) Histogram (f) is for green, (e) is for red, and (d) is for yellow. C) Histogram (e) is for green, (f) is for red, and (d) is for yellow. D) Histogram (f) is for green, (d) is for red, and (e) is for yellow. E) Histogram (d) is for green, (f) is for red, and (e) is for yellow. 9 2.0
10. The most common species of sweat bees are green, red, and yellow. For each color, we select a sample of 100 of bees of this color and record their length (in inches). We then create 3 data sets of 100 observations each, called "green", "red" and “yellow". Below are the boxplots and histograms for these data sets. The labels of the variables are missing from the histograms, but are included in the boxplots. Our task is to identify the missing labels. Which one of the following statements is correct? (a) green (b) red (c) yellow 0.0 0.5 1.0 1.5 2.0 0.0 0.5 1.0 1.5 2.0 0.0 0.5 1.0 1.5 2.0 (d) (e) (f) A) Histogram (d) is for green, (e) is for red, and (f) is for yellow. B) Histogram (f) is for green, (e) is for red, and (d) is for yellow. C) Histogram (e) is for green, (f) is for red, and (d) is for yellow. D) Histogram (f) is for green, (d) is for red, and (e) is for yellow. E) Histogram (d) is for green, (f) is for red, and (e) is for yellow. Frequency O'Z 02 4 Frequency OL Frequency…
The racial/ethnic diversity of post high school students enrolled at MVCC during the fall 2020 semester is given below. Racial/Ethnic Diversity of Post High School Students Race/Ethnicity Percent* American Indian or Alaska Native 0.4% Asian 5.3% Black or African American 9.6% Hispanic or Latino 9.6% Two or more races 2.8% Native Hawaiian or Pacific Islander <0.1% Non-Resident Alien 0.5% Unknown 1.5% White 70.2% (*Percentages may not total 100 due to rounding) What is the race/ethnicity of the majority of students at MVCC? What total percent of students were either Black or African American or Hispanic or Latino? There were 3,444 students enrolled at MVCC at the time of the study. How many (not percent) students were Asian? (The answer must be a whole number.)
The racial/ethnic diversity of post high school students enrolled at MVCC during the fall 2020 semester is given below. Racial/Ethnic Diversity of Post High School Students Race/Ethnicity Percent* American Indian or Alaska Native 0.4% Asian 5.3% Black or African American 9.6% Hispanic or Latino 9.6% Two or more races 2.8% Native Hawaiian or Pacific Islander <0.1% Non-Resident Alien 0.5% Unknown 1.5% White 70.2% (*Percentages may not total 100 due to rounding) Is race/ethnicity a qualitative or quantitative variable Is the data displayed in a frequency or relative frequency distribution?

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