Problem ITo test the effect of direct sunlight on seed production, a scientist tested seed production inexposed (top of plant) and shaded (bottom of plant) flowers of 10 plants. Later, he determinedthe number of seeds set per pod at each location. The data were as follows:PlantTopBottom140282444235148443425484363941741308303794631104819Test the hypothesis of no difference between the population means against the alternative that thetop flowers set more seeds and compute a 0.95 confidence interval for your statistic.

Given that, Plant Top Bottom 1 40 28 2 44 42 3 51 48 4 43 42…

Answered: Problem I To test the effect of direct…

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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Question 1 W Show all your work. Indicate clearly the methods you use, because you will be scored on the correctness of your methods as well as on the accuracy and completeness of your results and explanations. A marketing director for a beverage company conducted a study to investigate people's soda preferences in two regions of the country. The director selected a random sample of 100 people from the east coast and a random sample of 100 people from the west coast to survey. The responses are summarized in the following table. East Coast West Coast Regular soda 44 37 Diet soda 39 42 No preference 17 21 Total 100 100 Do the data provide convincing statistical evidence, at the level of a = 0.05, that the preferences are different between the two regions of the country? Complete the appropriate inference procedure to support your answer.
QUESTION 5 Public relation companies conducted two surveys about deodorants. The first survey asked a random sample of 500 men about their use of a natural deodorant. A second survey asked the same questions to a random sample of 550 women. In these two studies, 68% of men and 44% of women stated they were dissatisfied with the effectiveness of natural deodorants. Use these results to answer the following questions about the proportion of men and women's satisfaction with natural deoderants. (Round to the nearest whole person as needed). What is the difference between the proportion of men and women? (write as a decimal) The standard error for these two samples is (round to the nearest hundredth) Using a 99% confidence level, the lower limit is and the upper limit is QUESTION 6 Save All Answe Click Save and Submit to save and submit. Click Save All Answers to save all answers. ILOIIOOCI V O UDDU Y D IIINO VIIIS UING DIUvUlU DINU W uvup Hotgut auvut youISUII UNu yu @四田07A CC DIC. étv 12…
The average worker at a local brake manufacturer produces 10 brakes per day (other statistical information was not known). An industrial psychologist was hired to increase worker productivity and a new assembly method was designed and tested in a sample of workers. Identify the appropriate test. Select one: a. independent samples t test b. z test c. single sample t test d. paired samples t test
In a study to compare two different methods of teaching reading, a class of 20 children was divided into two groups at random. Each group was taught reading using one method. After six months the two groups were given the same test. One pupil in the first group was ill and missed the test. The scores are given below.Method 1 80 85 79 81 89 73 50 71 76Method 2 79 62 75 68 62 73 76 81 73 61(a) Calculate the extreme values and the quartiles for each group. (b) Hence draw box-and-whisker plots for the two groups using the same scale. (c) Comment on the differences between the two groups.
4) Members of a gym are asked what type of exercise they primarily use the gym for, and they are also asked whether they are satisified with the gym’s hours. Aerobic Weights Sports Step 2 of the write-up is H0 :p1 =p2 =p3 Satisfied - 78, 66, 41 Not Satisfied - 114, 91, 35 HA: Not all proportions of support are equal Use a Chi-Squared Test to see if the primary choice of exercise is independent of gym hour satisfaction. Use a 0.05 significance level. Include Steps 3 (p-value only), 4, and 5 in your write-up.
Cloud seeding has been studied for many decades as a weather modification procedure. The rainfall in acre-feet from 20 clouds that were selected at random and seeded with silver nitrate follows: 18.0, 30.7, 19.8, 27.1, 22.3, 18.8, 31.8, 23.4, 21.2, 27.9, 31.9, 27.1, 25.0, 24.7, 26.9, 21.8, 29.2, 34.8, 26.7, and 31.6. There is a claim that mean rainfall from seeded clouds exceeds 25 acre-feet. The P-value for the test H0: µ = 25 versus H1: µ > 25 is closest to:
Question 2 Six samples of five observations each have been taken of 80 kg concrete slabs produced by a machine and the results is showed below. a) Please choose the suitable control charts to test whether or not the process is in control. b) A new sample results in the following slab weights: 81.0, 81.0, 80.8, 80.6, and 80.5. Judge whether or not the process is in control based on the data (including new sample data). c) Based on the data in part b), the specification for the concrete slabs is 78kg to 81kg, is the specification being met? Using the formulation o=A₂R (n is sample size and A2 refers to tables in Week 8 slide) to estimate the standard deviation from average range. 1 79.2 78.8 80.0 78.4 81.0 2 80.5 78.7 81.0 80.4 80.1 3 79.6 79.4 80.4 80.3 80.8 Sample 4 78.9 79.4 79.7 79.4 80.6 5 80.5 79.6 80.4 80.8 78.8 6 79.7 80.6 80.5 80.0 81.1
A biologist wants to determine if different temperatures (15oC, 25oC, or 35oC) and amounts of sunlight (partial or full) will affect the growth of plants. He will test each combination of temperature and sunlight by randomly assigning 15 plants to each of the combinations. What type of sampling is described in this study? one sample paired data two samples more than two samples
Plz answer the part 2b and 2c in 20 mints plz it's very urgent plz

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