Application Exercise:Dr. Black is interested in the preference for dog breeds among high school students. He collected the observed frequencies below and wants to know if the breeds are equally preferred. What can beconcluded with a =0.05?Irish SetterGolden RetrieverPapillonGreat Dane1011178397a) Select and compute the appropriate statistic.---Select---b) Obtain/compute the appropriate values to make a decision about Ho.Critical Value =; Test Statistic =Decision: ---Select---c) Compute the corresponding effect size(s) and indicate magnitude(s).If not appropriate, input and/or select "na" below.Effect Size; Magnitude: ---Select---d) Make an interpretation based on the results.There is a significant relationship between dog breeds and high school students.There is a significant dog breed difference among high school students.There is no dog breed difference among high school students.

Given that Irish Setter Golden Retriever Papillon Great Dane 101 117 83 97 Significance…

Answered: Application Exercise: Dr. Black is…

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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An investigator analyzed the leading digits from 791 checks issued by seven suspect companies. The frequencies were found to be 5, 13, 5, 68, 273, 358, 5, 23, and 41, and those digits correspond to the leading digits of 1, 2, 3, 4, 5, 6, 7, 8, and 9, respectively. If the observed frequencies are substantially different from the frequencies expected with Benford's law shown below, the check amounts appear to result from fraud. Use a 0.01 significance level to test for goodness-of-fit with Benford's law. Does it appear that the checks are the result of fraud? Leading Digit Actual Frequency Benford's Law: Distribution of Leading Digits 1 3 4 5 6 7 8 9 13 5 68 273 358 5 23 41 30.1% 17.6% 12.5% 9.7% 7.9% 6.7% 5.8% 5.1% 4.6% Determine the null and alternative hypotheses. Но At least one leading digit has a frequency that does not conform to Benford's law. The leading digits are from a population that conforms to Benford's law. At least two leading digits have frequencies that do not conform…
Assume that the IQ score in this situation is measured using the standard-binet intelligence test, will the statistical decision change?
4
2. Get a tip measure and identify 20 of your classmates in random selections and measure their height in centimeters. Tabulate the measured height and obtain the following: (OBE Approach) (i) Mean (ii) Median (iii) Mode
In 2015, the average duration of long-distance telephone calls from a certain town was 3.9 minutes.A telephone company wants to perform a test to determine whether this average duration of longdistance calls has changed. Fifty calls, originating from the town, was randomly selected and thefollowing summary minutes.∑ ? = 205 ∑(? − ?̅)∑(? − ?̅)2 = 56.43 a) Calculate the sample mean, ?̅. b) Calculate the sample standard deviation c) Using the p value approach at the 1% level of significance, test whether the mean duration oflong-distance calls from the town had increased. d) Construct the 99% confidence interval for the population mean duration of the long-distance calls from the town. Answer sub-parts (d)
A company conducted a survey on the number of hours employees spend on a particular task per week. The data collected from a sample of 10 employees are as follows: 5, 6, 7, 8, 9, 10, 10, 11, 12, 13. Calculate the standard deviation of the hours spent on the task per week.
In a large city, researchers selected a random sample of 120 individuals who have multiple televisions in their house connected to a streaming device. Each individual was asked how many hours of streaming content they watch in a typical week. The sample had a mean of 12.5 hours. For which of the following populations is 12.5 hours a reasonable estimate of the mean hours of weekly streaming content watched? (A) All individuals who regularly watch streaming content (B) All individuals from this city who regularly watch streaming content (C) All individuals from this city with multiple streaming devices in their house (D) All individuals from this city with multiple streaming devices in their house who regularly watch streaming content (E) All 120 individuals in this city with multiple streaming devices in their home who regularly watch streaming content
Different chemicals are tested to check their effects on different cloth materials. The chemicals will be used in one of the finishing processes. Five cloth materials are selected for testing and four chemicals will be used on each cloth material sample. a) Are there significant differences between four different chemicals? ( = .05) b) Considering your answers in part a., perform the appropriate tests to determine which chemicals differ significantly.
An investigator analyzed the leading digits from 794 checks issued by seven suspect companies. The frequencies were found to be 218, 130, 106, 83, 65, 48, 48, 37, and 59, and those digits correspond to the leading digits of 1, 2, 3, 4, 5, 6, 7, 8, and 9, respectively. If the observed frequencies are substantially different from the frequencies expected with Benford's law shown below, the check amounts appear to result from fraud. Use a 0.025 significance level to test for goodness-of-fit with Benford's law. Does it appear that the checks are the result of fraud? Leading_Digit Actual_Frequency Benford's_Law:1) 218 30.10%2 )130 17.60%3) 106 12.50%4) 83 9.70%5) 65 7.90%6) 48 6.70%7) 48 5.80%8) 37 5.10%9) 59 4.60% Calculate the test statistic, χ2 =? (Round to three decimal places as needed.) Calculate the P-value=? (Round to four decimal places as needed.)
Since the chi-square does not indicate the strength of the association, a researcher must then conduct a separate test for the measure of association. True False

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