4.60Although bats are not known for their eyesight,they are able to locate prey (mainly insects) byemitting high-pitched sounds and listening forechoes. A paper appearing in Animal Behaviour ("TheEcholocation of Flying Insects by Bats" [1960]: 141–154)gave the following distances (in centimeters) at whicha bat first detected a nearby insect:62 23 27 56 52 344240 68 45 83a. Compute the sample mean distance at which thebat first detects an insect.b. Compute the sample variance and standard devia-tion for this data set. Interpret these values.

We have given that, The data set are : X:- 62, 23, 27, 56, 52, 34, 42, 40, 68, 45, 83 Then, We…

Answered: 4.60 • Although bats are not known for…

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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A physical therapist wanted to know whether the mean step pulse of men was less than the mean step pulse of women. She randomly selected 54 men and 70 women to participate in the study. Each subject was required to step up and down a 6-inch platform. The pulse of each subject was then recorded. The following results were obtained. Two sample T for Men vs Women N Mean StDev SE Mean Men Women 98% CI for mu Men - mu Women (- 12.20, - 1.00) T-Test mu Men = mu Women (vs H2 O C. Ho: H1 = H2; Ha: H1 #H2 (b) Identify the P-value and state the researcher's conclusion if the level of significance was a = 0.01. What is the P-value? P-value =
We compute a sample correlation coefficient of r=0.692 from a set of 12 data pairs. We are testing Ho:p=0 against H;:p#0 at a = 0.05. The value of the test statistic for this test is: O 3.18 O 3.64 O 3.03 3.94
1. Teacher Joy conducted a census in her class and she found out that the average time spent for studying is 2.25 hours, average height is 147 cm, and a random sample of 10 students got an average grade of 87%. Which is the statistic?A. 2.25 hoursB. 10 studentsC. 87%D. 147 cm2.. Suppose the null hypothesis states that the mean is less than or equal to 50 kg and the alternative hypothesis states that the mean is greater than 50 kg. Which of the following would commit Type I error?A. Conclude that µ = 50 kg when the truth is µ > 50 kg.B. Conclude that µ > 50 kg when the truth is µ = 50 kg.C. Conclude that µ = 50 kg when the truth is µ < 50 kg.D. Conclude that µ < 50 kg when the truth is µ = 50 kg.3. What variable can the researcher freely manipulate in a study?A. dependent variableB. independent variableC. both the independent and dependent variableD. neither the independent nor the dependent variable
Calculate the Variance using the following information: |ΣΧ; = ΣΧ2 = n= 32.3 413.8 18 Round your answer to the nearest hundredth. (Place your answer in the box below)
The WISC-IV is a standardised instrument for measuring IQ in children. The population M = 100 and SD = 15. If a child scores 85 on the WISCIV then what % of children in the %3D population have a higher IQ? а. 60% ОБ. 90% О с. 84% O d. 75%
Do question 7,8 and 9 only The new study also carried out a test to determine whether the population proportion of unvaccinated school children contracting winter flu was higher than the population proportion of vaccinated school children. The Z test statistic to test this belief is found to be 1.874. The corresponding p-value is 0.0305 0.1212 0.3036 0.7724 Question 7 Suppose that the new study uses a level of significance of 0.05 to test the claim in Question 6. The probability of Type I error is 0.025 0.05 0.95 0.975 Question 8 Based on previous studies of school children who were vaccinated and contracted the flu, the time in hours that the flu symptoms last is assumed to follow a normal distribution with a mean of 20.7 hours and a standard deviation of 7.3 hours. The probability that a randomly selected school child has flu symptoms for more than 24 hours is 0.1628 0.3256 0.6744 0.8372 Question 9 Suppose that a random sample of 5 vaccinated school children is taken. Assuming the…
a) which for these data is 32.1470, 42.3520, or 10.0674 c) that minimizes the error sum of squares, total sum of squares, or regression sum of squares…for which these data is 32.1470, 42.3520, or 10.0674
Based on the attached Table 2 and 3: 1) How would you describe the result of t = -1.45 in this study? 2) Which t test statistic listed in Table 3 represents the smallest relative difference between the pretest and 3 months? Is it statistically significant? What does this result mean? 3) What are the assumptions for conducting a t-test for dependent groups? Which of these assumptions do you think were met by this study?
4:40 Amylab.pearson.com Identify the symbols used for each of the following: (a) sample standard deviation; (b) population standard deviation; (c) sample variance; (d) population variance. If sample data consist of weights measured in grams, what units are used for these statistics and parameters? a. The symbol for sample standard deviation is b. The symbol for population standard deviation is c. The symbol for sample variance is d. The symbol for population variance is
5.2° A company has a policy of retiring company cars; this policy looks at number of miles driven, purpose of trips, style of car and other features. The distribution of the number of months in service for the fleet of cars is bell-shaped and has a mean of 51 months and a standard deviation of 9 months. Using the empirical rule (as presented in the book), what is the approximate percentage of cars that remain in service between 24 and 42 months? Do not enter the percent symbol. ans = Question Help: Video Submit Question 0 % a $ || hp
solve by using mathematical equations and formulas only
A sample of n=4 scores has a mean of M=75. Find the z-score for this sample: a. If it was obtained from a population with m=80 and SD=10. b. If it was obtained from a population with m=80 and SD=20. c. If it was obtained from a population with m=80 and SD=40.

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