Joan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor cost associated with aparticular landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project.For cost estimating purposes, managers use two hours of labor time for the planting of a medium-sized tree. Actual timesfrom a sample of 10 plantings during the past month follow (times in hours).2.4t(to 3 decimals)2.8Select your answer -2.2Ho : μSelect your answer - 2Ha - Select your answer - ✪ 2b. Compute the sample mean.(to 2 decimals)c. Compute the sample standard deviation.(to 4 decimals)d. Find the test statistic and p-value. (Use Table 2 in Appendix B.)✪2.71.71.5With a 0.05 level of significance, test to see whether the mean tree-planting time differs from two hours.a. State the null and alternative hypotheses.1.62.42.63.1p-valuee. What is your conclusion?We - Select your answer-reject the null hypothesis. There Select your answer - enough evidence to prove that the meantree-planting time differs from 2 hours.

Sample size (n) = 10 Level of significance (α) = 0.05

Answered: Joan's Nursery specializes in…

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 brand manager for a brand of toothpaste must plan a campaign designed to increase brand recognition. He wants to first determine the percentage of adults who have heard of the brand. How many adults must he survey in order to be 80% confident that his estimate is within seven percentage points of the true population percentage? Complete parts (a) through (c) below. a) Assume that nothing is known about the percentage of adults who have heard of the brand. n = (Round up to the nearest integer.) b) Assume that a recent survey suggests that about 87% of adults have heard of the brand. n = (Round up to the nearest integer.) c) Given that the required sample size is relatively small, could he simply survey the adults at the nearest college? A. No, a sample of students at the nearest college is a stratified sample, not a simple random sample, so it is very possible that the results would not be representative of the population of adults. O B. No, a sample of students at the nearest…
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The brand manager for a brand of toothpaste must plan a campaign designed to increase brand recognition. He wants to first determine the percentage of adults who have heard of the brand. How many adults must he survey in order to be 95% confident that his estimate is within five percentage points of the true population percentage? Complete parts (a) through (c) below. Question content area bottom Part 1 a) Assume that nothing is known about the percentage of adults who have heard of the brand. n=enter your response here (Round up to the nearest integer.)
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In planing for his children to go back to school Susan buys several items at a discount. Five items at $1.29 each, three at $1.49 each, six at $1.79 each and nine at $0.99 each. What was the median cost of all items? $1.48 Oa. Ob. O b. $1.99 c. Oc. $1.33 O d. $1.39 $1.29 O e.
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