Many college graduates who are employed full-time have longer than 40-hour work weeks. Suppose that we wish to estimate the meannumber of hours, µ, worked per week by college graduates employed full-time. We'll choose a random sample of college graduatesemployed full-time and use the mean of this sample to estimate µ. Assuming that the standard deviation of the number of hoursworked by college graduates is 6.10 hours per week, what is the minimum sample size needed in order for us to be 99% confident thatour estimate iİs within 1.5 hours per week of µ?reCarry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it isthe minimum whole number that satisfies the requirements).(If necessary, consult a list of formulas,)CheckSave For LaterSubmit AssignmentGaw HilLLLC.A Pghts Reserved.Terms of Use Pivacy Center Accessibilityceresc#$%&bac123456.78

Given: x=40σ=6.10margin of error=1.5α=0.01

Answered: Many college graduates who are employed…

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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Biological oxygen demand (BOD) is a pollution index that is monitored in the treated effluent of paper mills. A certain paper mill has taken 31 samples over the past 3 months. The mean and standard deviation for the sample data are 3.42 and 0.728 ppm respectively. The mill would like to see if this sample indicates that the true average BOD in their treated effluent exceeds the targeted 3.00 ppm. Let ? = 0.05. A) The test statistic, (ttest), for this data set is: Note: Round your answer to the nearest hundredth.B) The p-value is: C) The statistical decision and corresponding English interpretation for this study are: Fail to reject Ha: conclude that the true BOD in treated effluent exceeds 3 ppmFail to reject Ho: we cannot conclude that the true BOD in treated effluent exceeds 3 ppm Reject Ha: we cannot conclude that the true BOD in treated effluent exceeds 3 ppmReject Ho: conclude that the true BOD in treated effluent exceeds 3 ppm
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Data from the National Association of Realtors indicates that mean price of a home in Denver,Colorado, in the first three months of 2018 was $255,300. We can write this as 255.3 with unitsof thousands of dollars for our calculations. A random sample of 60 homes sold in 2020 had amean price of 235 (thousand dollars). Assume the standard deviation s = 140 (thousand dollars).Can we conclude that the mean price in 2020 differs from the mean price in the first 3 months of2018? Use the α = 0.05 level of significance.Parameter_____________________________________________________________________Null hypothesis ____________________________________Alternative hypothesis ________________________________________This test is: One-sided Two-sidedTest statisticp-valueCircle a decision: Reject H0 Do not reject H0Conclusion: At the 0.05 level of significance, we ___________________ have sufficient evidenceto say that________________________
Does it take less time for seeds to germinate if they are near rock music that is continuously playing compared to being near classical music? The 43 seeds that were exposed to rock music took an average of 27 days to germinate. The standard deviation was 10 days. The 59 seeds that were exposed to classical music took an average of 34 days to germinate. The standard deviation for these seeds was 14 days. What can be concluded at the a = 0.05 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: Select an answer v Select an answer v Select an answer v (please enter a decimal) H1: Select an answer v Select an answer v Select an answer v (Please enter a decimal) c. The test statistic ?v= (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ? va f. Based on this, we should Select an answer v the null hypothesis. g. Thus, the final conclusion is…
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