DIecval1,46621A@23. The mean for the SATS for all high school students was 500, with a standard deviation of 100.75 students from Cerritos were tested and they produced a mean of 510.a. Who are the groups being compared/tested?What is the dependent variable?b. What are the null and research hypotheses?c. what are the numbers needed for the z statistic?--F2WSd. What is the z statistic?e. For a two tailed test at .05 significance, the critical area is +/- 1.96. What decision do wemake?e. For a two tailed test at .05 significance, the cutoff is +/- 1.96, what decision do we make?#3n80F3E$ 4aF4RD F%59F5TGMacBook Air^6CF6Y&7HKF7U*8J5DIIF8K

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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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1..
i.
1)higher or lower 2)slower or faster
3. A certain breed of cat has weights which are normally distributed with a mean of 6.2 pounds, and a standard deviation of .8 pounds. What would be the z-score of a cat which weighed 7.4 pounds? 1.50 1.20 -1.50 -1.20
4. Heights of Parents. A sociologist claims that women tend to marry men who are taller than themselves? Suppose that 20 random married couples are measured. If the difference in height for each set of parents is found by subtracting the mother's height from the father's height, the mean was 4.4 inches with a standard deviation of 4.2 inches. Use a 0.01 significance level to test the claim that the mean difference is greater than 0.
31. A company of coffee prices at 4 randomly selected grocery stores in Sampaloc, Manila showed increases from the previous month of 12, 15, 17 and 20 pesos for 200-gram jar. Find the sample variance and the sample standard deviation. a. 8.3 & 1.33 b. 10.5 & 4.21 c. 11.3 & 3.37 d. 12.7 & 2.55
27. Which is cheaper: eating out or dining in? The mean cost of a flank steak, broccoli, and rice bought at the grocery store is $13.04 (Money.msn website, November 7, 2012). A sample of 100 neighborhood restaurants showed a mean price of $12.75 and a standard deviation of $2 for a comparable restaurant meal. a. Develop appropriate hypotheses for a test to determine whether the sample data port the conclusion that the mean cost of a restaurant meal is less than fixing a com- st sup- parable meal at home. b. Using the sample from the 100 restaurants, what is the p-value? At a = .05, what is your conclusion? Repeat the preceding hypothesis test using the critical value approach. с. || d.
c) A dispensing machine fills Yomi’s yogurt drinks into cups. The volume of a Yomi’s yogurt drink is normally distributed with a mean of 520 ml and a standard deviation of 5 ml.Question(ii) 4.8% of the of the Yomi’s yogurt drink is having the volume to be less than k ml. Find the value of k.
3. Use the following information about the heights measured in feet of a sample of 40 Ponderosa Pine trees and 40 Eastern White Pine trees. Ponderosa Pine Trees: Mean of 77.5 ft with a standard deviation of 11.55 ft Eastern White Pine Trees: Mean of 67.25 ft with a standard deviation of 10.33 ft Is it more unusual for a Ponderosa Pine tree to have a height of 71 ft or an Eastern White Pine tree to have a height of 71 ft relative to the data of each species of tree? Use z-scores to explain your solution.
A primary measure of dispersion for sample data is the sample standard deviation, s. Choose the best option to explain what the meaning of the sample standard deviation is, in general. A. The distance between one observation and the mean. B. The average distance of an observation from the middle of the distribution. C. The average distance between observations in the sample. D. The distance between the third and first quartiles.
3. Based on information from the U.S. Census Bureau, the mean travel time to work (mins), for all workers 16 years and older was 25.3 minutes. A large company with offices in several states randomly sampled 100 of its workers to ascertain their commuting times. The sample mean was 23.9 minutes, and the population standard deviation is 6.39 minutes. At the level of significance, can it be concluded that the mean commuting time is less for this particular company? H. : H :
c. Analyzing delivery records for 18 customers from "Jalwa" tailoring company, you found their mean delivery to be 11.53 days with a standard deviation of 4.83 days. Which tailoring company had more variation in their delivery records? Shawapna Tailoring Company OJalwa Tailoring Company O Equal variation OCan not be calculated

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