(v)In order to increase the reliability of the survey results, the CEO intends to choose 60members out of 200 for opinions. Calculate the sampling interval, k'.(vi) Suggest a way of selecting the sample when the sampling interval is not a whole number.(vii) Suppose that a random number 0.398 is obtained, compute the random start using samplinginterval, k'(viii) List the 1-in-k' sample using the sampling interval, k', and random start obtained in part (vii).(ix) What possible problems will be incurred by your suggested method in part (vi)?

Answered: Image /qna-images/answer/f93c1b82-1b3c-4463-a362-ffbb889e370d.jpg

Answered: In order to increase the reliability of…

Calculus For The Life Sciences

2nd Edition

ISBN:9780321964038

Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Chapter13: Probability And Calculus

Section13.2: Expected Value And Variance Of Continuous Random Variables

Problem 10E

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Two companies manufacture a rubber material in- tended for use in an automotive application. The part will be subjected to abrasive wear in the field application, so we decide to compare the material produced by each company in a test. Twenty-five samples of material from each company are tested in an abrasion test, and the amount of wear after 1000 cycles is observed. For company 1, the sample mean and standard de- viation of wear are = 20 milligrams/1000 cycles and s = 2 milligrams/1000 cycles, while for company 2 we obtain = 15 milligrams/1000 cycles and s, = 8 milligrams/1000 cycles. Find a 95% confidence interval on the difference in mean wear µ, - Hz. Assume each population is normally distributed but that their variances are not equal. What is the lower bound? Three decimal places
Can i get help with this problem? the sample proportion denoted phat is given by the formula phat(p-hat)=x/n where x s the number of individuals with a specified characteristic in a sample of n individuals. 1. find: phat(p-hat_ if the students poll surveyed 1200 people that vacation during the summer and asked if they plan to work while on vacation. Of those surveyed, 552 indicated that they plan to work on vacation. Find the sample proportion of individuals polled that plan to work on vacation. So, Students estimates that from the value of phat(p-hat) found above that ____________ or ________ % of adults who vacation plan to work on vacation,
The number of books sold over the course of the for day book fair were 195, 158, 263 and 100. Assume that samples of size 2 are randomly selected with replacement from this population of four values. List the different possible samples and find the mean of each of them.
Compute the mean and standard deviation of the sampling distribution of the sample mean when you plan to take an SRS of size 64 from a population with a mean of 44 and standard deviation of 16. Soln. (ii). In (i) above, repeat the calculations for a sample size of 576. Explain the effect of the sample size increase on the mean and standard deviation of the sampling distribution. Soln. (iii). You take an SRS of size 64 from a population with mean 82 and standard deviation of 24. According to the Central Limit Theorem, what is the approximate sampling distribution of the sample mean? Use the 95 parts of the 68-95-99.7 rule to describe the variability of Xbar. Soln. (iv). In the settings of (iii) above, suppose we increase the sample size to 2304. Use the 95 parts of the 68-95-99.7 rule to describe the variability of Xbar. Compare your results with those you found in (iii) Soln.
A population has a mean p= 160 and a standard deviation o=22. Find the mean and standard deviation of the sampling distribution of sample means with sample size n= 45. The mean is H- = |, and the standard deviation is o- = (Round to three decimal places as needed.)
Construct the sampling distribution of the mean based on all possible samples of size n = 2, drawn without replacement from a population consisting of {1, 2, 3, 4}. Based on this answer name with reasons the sampling procedure employed to generate the samples used to construct the sampling distribution of the mean. Then Use the sampling distribution constructed to demonstrate that the sample mean and the sample variance are unbiased estimators of the population mean and variance respectively.
How many different simple random samples of size 4 can be obtained from a population whose size is 10? Do not use statistical features of your calculator.
Find the standard error of the sample mean such that we have 70 random samples with mean 40 and standard deviation of 16.
Suppose 7% of students are veterans and 137 students are involved in sports. How unusual would it be to have no more than 6 veterans involved in sports? (6 veterans is about 4.3796%)When working with samples of size 137, what is the mean of the sampling distribution for the proportion of veterans? When working with samples of size 137, what is the standard error of the sampling distribution for the proportion of veterans? Compute P(ˆp≤p^≤ 0.043796).P(ˆp≤p^≤ 0.043796) = NOTE: Give results accurate to 5 decimal placesIs this result unusual? Yes, there is a less than 50% chance of this happening by random variation. No, there is at least a 50% chance of this happening by random variation. Submit QuestionQuestion 4 Having a lot of trouble with this question. Please guide me through this so I understand how to do this myself. Thank you!
The weights of men in a particular age group have mean = 152 pounds and standard deviation or 24 pounds. (a) for randomly selected samples of - 36 men, what is the standard deviation of the sampling distribution of x-bar? ad. (a)- (b) for randomly selected samples of n 144 men, what is the standard deviation of the sampling distribution of x-bar? ad(4)-[ (c) In general, how does increaung the sample size affect the standard deviation of the sampling distribution of possible sample means? Parts (0) end (b) provide a hint the value of the standard deviation of the sampling distribution of the sample mean Increasing the sample size-Select- (d) If the sample size is 30 or more, what rule allows the sampling distribution of x-bar to be approximately normal? -Select-
If all the possible random samples of n=81 scores are selected from a normal population with u=80 and o=9 and the mean is calculated for each sample what is the average of all the sample means?

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