Please do b and cAnd also:c. Compute the sample size necessary to obtain the desired estimate. In a sample of n = 18 lichen specimens, the researchers found the mean andstandard deviation of the amount of the radioactive element, cesium-137, thatwas present to be 0.009 and 0.006 microcurie per milliliter, respectively.Suppose the researchers want to increase the sample size in order toestimate the mean u to within 0.001 microcurie per milliliter of its true value,using a 95% confidence interval. Complete parts a through c.a. What is the confidence level desired by the researchers?The confidence level is 95%b. What is the sampling error desired by the researchers?The sampling error is

We have given that Sample size (n) = 18Sample mean (x̅) = 0.009 Standard…

Answered: In a sample of n = 18 lichen specimens,…

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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Jennifer wants to estimate the average weight of the 2000 sheep on her farm. She selects a sample of 10 sheep, and weighs them. Explain why this approach may produce a: 1) coverage error 2) measurement error must show all work and reasoning.
Geckos are lizards with specialized toe pads that enable them to easily climb all sorts of surfaces. A research team examined the adhesive properties of 7 Tokay geckos. Displayed are the toe-pad areas (in square centimeters, cm²) for this sample. 5.6 4.9 6.0 5.1 5.5 5.1 7.5
Scanned with CamScanner 10. You wish to estimate, with 95% confidence, the proportion of senior high students in your school who read the first book of Harry Potter. Your estimate must be accurate within 2% of the population proportion. With no preliminary estimate available, what is the minimum sample size that you need? C. at least 2506 D. at least 2605 A. at least 2301 B. at least 2401
Researchers investigated how the size of a bowl affects how much ice cream people tend to scoop when serving themselves. At an "ice cream social," people were randomly given either a 17-oz or a 34-oz bowl (both large enough that they would not be filled to capacity.) They were then invited to scoop as much ice cream as they liked. Did the bowl size change the selected portion size? The summaries are shown. Test an appropriate hypothesis and state your conclusions. For assumptions and conditions that you cannot test, you may assume that they are sufficiently satisfied to proceed. (Assume à significance level of 0.10.) Identify the null and alternative hypotheses. Choose the correct answer below. A. Ho: HL-Hs = 0 HA: HL-Hs #0 B. Ho: HL-Hs = 0 HA:HL-HS >0 O C. Ho: HL-Hs = 0 HA: HL-HS <0 D. Ho: HL-Hs #0 HA:HL-Hs = 0 Compute the t-statistic. ... t = (Round to two decimal places as needed.) Small Bowl n. 29 y S 5.41 oz 1.83 oz Large Bowl n y S 22 6.28 oz 2.95 oz 14( 18( 12
A logging company wants to calculate the total amount of volume in cubic meters of wood, in logs that can be extracted from a eucalyptus forest. The perimeter of the log is easy to obtain, but the height is difficult to measure. Not even with the use of an appropriate instrument is it possible to measure because the trees are too close to each other. The forestry engineer in charge decides to try a sampling estimate. The idea is to measure the trunk perimeter and height (until the beginning of the branch) of 13 randomly selected trees and extend the result obtained to all 2000 trees in the forest. It is known that there is a constant relationship between the height (Y) and the perimeter of the trunk (X) of the tree. Thus, the engineer proposes that 13 trees with trunks of different perimeters be selected and their heights measured. Next, he proposes to fit a linear regression model to the data obtained yi = a + bxi + ei. The model will provide a value that establishes the relationship…
The total size of a university is 7,610. Determine the sample size for a study using the COchran's formula provided that Z = 1.96 and e = 0.05
In spite of the potential safety hazards, some people would like to have an Internet connection in their car. A preliminary survey of adult Americans has estimated this proportion to be somewhere around 0.30. Use the given preliminary estimate to determine the sample size required to estimate this proportion with a margin of error of 0.05.
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You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p∗=22%p∗=22%. You would like to be 95% confident that your esimate is within 4% of the true population proportion. How large of sample size is required?
Betty, an employee of Shining Sun Daycare Centerread an article in Healthy Child Magazine sayingthat the average 3-year-old child is 37 in. tall.Betty works with 10 3-year-olds at Shining Sun,so later that week, she measured the height ofeach child who had just turned or was about toturn 3 years old. Here are the descriptive statisticsfor the sample: M = 35, s = 3.1. State the nondirectional hypothesis.2. Determine the critical t for a = .05.3. Calculate t. Show your calculations.4. Is the height of 3-year-olds in Shining SunDaycare Center significantly different fromthe height given in the magazine?
The accompanying data are the weights (kg) of poplar trees that were obtained from trees planted in a rich and moist region. The trees were given different treatments identified in the accompanying table. Also shown are partial results from using the Bonferroni test with the sample data. Complete parts (a) through (c). No treatment Fertilizer Irrigation Fertilizer and Irrigation 1.26 1.06 0.08 0.84 0.62 0.87 0.59 1.88 0.53 0.49 0.09 1.48 0.11 0.58 0.85 2.29 1.29 0.95 0.92 1.75 Bonferroni Results (I) TREATMENT (J) TREATMENT Mean Difference (I-J) Std. Error Sig 1.00 2.00 −0.0280 0.25647 1.000 3.00 0.2560 0.25647 1.000 4.00 −0.8860 0.25647 0.034 a. Use a 0.10 significance level to test the claim that the different treatments result in the same mean weight. Determine the null and alternative hypotheses. Find the test statistic (round…

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