Find the minimum sample size n needed to estimate u for the given values of c, o, and E.c = 0.90, o = 9.9, and E = 2Assume that a preliminary sample has at least 30 members.(Round up to the nearest whole number.)n =

We assume that a preliminary sample has atleast 30 members. Thus, we can apply the Central Limit…

Answered: Find the minimum sample size n needed…

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 pulse rates of 155 randomly selected adult males vary from a low of 41 bpm to a high of 113 bpm. Find the minimum sample size required to estimate the mean pulse rate of adult males. Assume that we want 95% confidence that the sample mean is within 2 bpm of the population mean. Complete parts (a) through (c) below. a. Find the sample size using the range rule of thumb to estimate σ. n = (Round up to the nearest whole number as needed.)
3. Write R codes to solve the following problems: a) Generate a random sample with size 250 from the standard normal distribution. b) Write R codes to construct the following graphic using the data generated in the previous question. Histogram and density plot of the random sample 3 Data Density 0'0 0.1 0.2 0.3 0.4 0.5 2.
1. A population consists of 4 types of units, A, B, C, and D. A theory suggests that these should occur in the ratios 3:3:3:1, respectively. A random sample breaks down as follows: Туре number observed A C D 19 3 9 9. Carry out a chi-squared goodness of fit test to see if this data fits the theory, and give (a) the test statistic and (b) the P-value of the tesSt. If some cell has too low an expected frequency, combine that cell with cell C. Does the data contradict the theory? (c) Answer this question "yes" or "no" based on the results of the goodness of fit test at the a = .05 significance level.
1) Review the paired samples t test equation below and answer the questions: 1a. What is d with the bar over it called and how do you find it? 1b. What is the S (with subnotation of d) called? 1c. What is n?
The pulse rates of 158 randomly selected adult males vary from a low of 44 bpm to a high of 120 bpm. Find the minimum sample size required to estimate the mean pulse rate of adult males. Assume that we want 90% confidence that the sample mean is within 2 bpm of the population mean. Complete parts (a) through (c) below. a. Find the sample size using the range rule of thumb to estimate σ. n=245 b. Assume that σ=10.5 bpm, based on the value s=10.5 bpm from the sample of 158 male pulse rates. n= c.. Compare the results from parts (a) and (b). Which result is likely to be better?
O a. the OLS estimate of r is biased due to sample selection. O b.the OLS estimate of r is unbiased. Oc the error u is homoskedastic. O d. the OLS estimator is BLUE.
A-C
(Round up to the nearest whole number as needed.)
Determine the minimum sample size required when you want to be 95% confident that the sample mean is within one unit of the population mean and o=17.2. Assume the population is normally distributed
Question 7n A business analyst wants to estimate the average monthly expenditure on bread by a family in Montreal. She wants to be 95% confident of her results, and she wants the estimate to be within $1.00 of the actual figure. Choices below are given as [lower limit, upper limit]. The historical standard deviation of monthly bread purchases is $4.00. What is the required sample size to achieve her estimation accuracy? a) 62 b) 63 c) 44 d) 61

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Find the minimum sample size n needed to estimate µ for the given values of c, o, and E. c = 0.90, o = 9.9, and E= 2 Assume that a preliminary sample has at least 30 members. n = (Round up to the nearest whole number.)