Exercise Lab 6 Graphing and Data_Excel Steps-1

Using satellite imagery to aid agriculture grain production has been done on a limited scale as far back as the 1970's when NASA first launched the Landsat satellite. But it has only been recently that the satellite images, including GPS satellites, and data from typical farm operations have been integrated together to provide a data driven innovative technology that improves the efficiency and productivity on farms. In one study samples were taken on wheat yields in the State of Washington which historically had average yields of 35.6 bushels per acre with a standard deviation of 3.7 bushels per acre. Suppose that a random sample of the wheat yields on 40 different farms was taken and the sample mean for the wheat yields was computed, and you are interested in a probability about the sample mean. 28. Pick the equation most appropriate to deal with the problem above. a) p(x) = (nCx) p*(1-P)"-* b) x = μ + zo c) z= x-μ of √n d) z = x-μ O 29. If the sample mean is 34.8 bushels of wheat,…

The stated goal of a chain of service stores is to provide a lube and oil change for anyone's automobile in 15 minutes. The manager at one store thinks that there is a growing disparity among his workers in the time it takes to lube and change the oil of an automobile. To monitor this, the manager has selected a sample of 20 days and has recorded the time it took to service 100 automobiles each day. Data about the number of times the service was performed in 15 minutes or less (515) are found below. Complete parts a through c Click the icon to view the data. a. Compute p and sp p-(Round to four decimal places as needed.) Sp (Round to four decimal places as needed) b. Construct a p-chart and determine if the process of the time required for oil and lube jobs is in control Which graph below shows a p-chart for the data? O A. OB. Am 0.05 -ww Is the process in control? OA. Since 10 points in a row are below the centerline, followed by 10 points above, conclude that the process is out of…

Two of the hottest smartphones on the market are the newly released iPhone6 and the Samsung Galaxy S6.  CNet.com offers online reviews of all major cell phones, including battery life tests.  In a review of the iPhone6, the talk-time battery life of 35 iPhones was measured.  Similarly, the talk-time battery life of 30 Galaxy S6s was measured. Two outputs are given below. Which is appropriate for analyzing the data collected?      Output 1 Output 2   Using the StatCrunch output chosen above, determine if there is a difference in the mean battery life for the two phones.  Use a significance level of 0.01 when conducting the test.  Select the appropriate hypotheses. Make sure the notation used in the hypotheses agrees with the type of samples selected in the output. Ho:μd=0Ho:μd=0Ha:μd<0Ha:μd<0 Ho:μd=0Ho:μd=0Ha:μd≠0Ha:μd≠0 Ho:μd=0Ho:μd=0Ha:μd>0Ha:μd>0 Ho:μ1=μ2Ho:μ1=μ2Ha:μ1>μ2Ha:μ1>μ2 Ho:μ1=μ2Ho:μ1=μ2Ha:μ1≠μ2Ha:μ1≠μ2 Ho:μ1=μ2Ho:μ1=μ2Ha:μ1<μ2Ha:μ1<μ2 αα =…

Variation in gasoline mileage among makes and models of automobiles is influenced substantially by the weight and horsepower of the vehicles. An automobile manufacturer would like to determine if heavier cars consumer more gas than lighter cars. He collects data on 25 heavy and 25 light cars to test this hypothesis. What analysis would you complete to answer this question?

In an observational study, it was noticed that people that eat more chocolate tend to have better blood flow than the general population. Researchers wonder whether the improved blood flow might be caused by flavanols (a molecule found in many foods). Dark chocolate contains a high concentration of flavanols, but milk chocolate contains a much lower concentration. How could the researchers design an experiment to determine the effects of flavanol on blood flow from the different types of chocolate?

use calculator method

People gain weight when they take in more energy from food than they expend. Researchers wanted to investigate the link between obesity and energy spent on daily activity. Choose 20 healthy volunteers who don't exercise. Deliberately choose 10 who are lean and 10 who are mildly obese but still healthy. Attach sensors that monitor the subjects' every move for 10 days. The table below presents data on the time (in minutes per day) that the subjects spent standing or walking, sitting, and lying down. Is there a significant difference between the mean times the two groups spend lying down? Let ?1 be the mean time spent lying down by the lean group, and ?2 be the mean time for the obese group. Time (minutes per day) spent in three different postures by leanand obese subjects Group Subject Stand/Walk Sit Lie Lean 1         506.100 374.300 559.500 Lean 2         602.925 376.512 455.650 Lean 3         315.212 587.138 536.362 Lean 4         587.644 352.144 487.269 Lean 5…

People gain weight when they take in more energy from food than they expend. Researchers wanted to investigate the link between obesity and energy spent on daily activity. Choose 20 healthy volunteers who don't exercise. Deliberately choose 10 who are lean and 10 who are mildly obese but still healthy. Attach sensors that monitor the subjects' every move for 10 days. The table below presents data on the time (in minutes per day) that the subjects spent standing or walking, sitting, and lying down. Is there a significant difference between the mean times the two groups spend lying down? Let ?1 be the mean time spent lying down by the lean group, and ?2 be the mean time for the obese group. Time (minutes per day) spent in three different postures by leanand obese subjects Group Subject Stand/Walk Sit Lie Lean 1         509.100 366.300 554.500 Lean 2         603.925 374.512 452.650 Lean 3         322.212 580.138 533.362 Lean 4         581.644 362.144 489.269 Lean 5…

Zika and male reproduction. The Zika virus, which is known to be transmitted by mosquitoes, can also be transmitted sexually, as the virus can persist for weeks in the semen of symptom-free infected men. Using a mouse model, researchers examined the impact of Zika on male reproductive organs. Young adult male lab mice of a breed susceptible to Zika were either inoculated with Zika or not. Here are the weights of their testes two weeks later (in grams, g) Uninfected 85 85 90 91 96 100 Infected 17 93 15 12 10 9 10 12 a) What two populations do the researchers want to compare and what is the response variable? b) State the null and alternative hypotheses. Plot the data and check the conditions for inference. Explain why a two-sample t test is not appropriate here.

answer part b frq style

A professor suspects that recent testing will lead to greater retention of course material in a statistics course.to examine this, students in one session of PSYC stats are given a short quiz every week. Students in the second section of the PSYC stats take only one mid term and final. At the end of the quarter, both sections receive the final exam, and the scores are summarized below. Does the data indicate more frequent testing will produce and effect on the final exam score? Use a two-tail test at .05 level of significance. Show your work for each step   Frequent exams N= 22 Sample means = 85 Ss=350     Frequent exams N= 20 Sample means = 79 Ss=1050   Calculate Cohens d or argue why its not appropriate in this scenario? Name the research design used? Write the results in APA format

A medical student at a community college in city Q wants to study the factors affecting the systolic blood pressure of a person (Y). Generally, the systolic blood pressure depends on the BMI of a person (B) and the age of the person A. She wants to test whether or not the BMI has a significant effect on the systolic blood pressure, keeping the age of the person constant. For her study, she collects a random sample of 150 patients from the city and estimates the following regression function: Y= 15.50 +0.90B + 1.10A. (0.48) (0.35) The test statistic of the study the student wants to conduct (Ho: B, =0 vs. H4: B, #0), keeping other variables constant is. (Round your answer to two decimal places.) At the 5% significance level, the student will v the null hypothesis. Keeping BMI constant, she now wants test whether the age of a person (A) has no significant effect or a positive effect on the person's systolic blood pressure. So, the test statistic associated with the one-sided test the…

There have been many studies recently concerning coffee drinking and cholesterol level. While it is known that several coffee-bean components can elevate blood cholesterol level, it is thought that a new type of paper coffee filter may reduce the presence of some of these components in coffee. The effect of the new filter on cholesterol level will be studied over a 10-week period using 300 nonsmokers who each drink 4 cups of caffeinated coffee per day. Each of these 300 participants will be assigned to one of two groups: the experimental group, who will only drink coffee that has been made with the new filter, or the control group, who will only drink coffee that has been made with the standard filter. Each participant’s cholesterol level will be measured at the beginning and at the end of the study. Which test would you conduct to determine whether the change in cholesterol level would be greater if people used the new filter rather than using the standard filter? Why would the…

There have been many studies recently concerning coffee drinking and cholesterol level. While it is known that several coffee-bean components can elevate blood cholesterol level, it is thought that a new type of paper coffee filter may reduce the presence of some of these components in coffee. The effect of the new filter on cholesterol level will be studied over a 10-week period using 300 nonsmokers who each drink 4 cups of caffeinated coffee per day. Each of these 300 participants will be assigned to one of two groups: the experimental group, who will only drink coffee that has been made with the new filter, or the control group, who will only drink coffee that has been made with the standard filter. Each participant’s cholesterol level will be measured at the beginning and at the end of the study. Describe an appropriate method for assigning the subjects to the two groups so that each group will have an equal number of subjects. In this study, the researchers chose to include a…