عند إرسال هذا Find the النموذج variance of the data انات التالية * 2,4,5,6.8.17
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- A professor who teaches a large introductory statistics class (197 students) with eight discussion sections would like to test if student performance differs by discussion section, where each discussion section has a different teaching assistant. The summary table below shows the average final exam score for each discussion section as well as the standard deviation of scores and the number of students in each section. Sec 1 Sec 2 Sec 3 Sec 4 Sec 5 Sec 6 Sec 7 Sec 8 ni 33 19 10 29 33 10 32 31 x̄i 92.94 91.11 91.8 92.45 89.3 88.3 90.12 93.45 si 4.21 5.58 3.43 5.92 9.32 7.27 6.93 4.57 The ANOVA output below can be used to test for differences between the average scores from the different discussion sections. Df Sum Sq Mean Sq F value Pr(>F) section 7 525.01 75 1.87 0.0767 residuals 189 7584.11 40.13 Conduct a hypothesis test to determine if these data provide convincing evidence that the average score varies across some (or all) groups. Check…According to a leasing firm's reports, the mean number of miles driven annually in its leased cars is miles with a standard deviation of miles. The company recently starting using new contracts which require customers to have the cars serviced at their own expense. The company's owner believes the mean number of miles driven annually under the new contracts, , is less than miles. He takes a random sample of cars under the new contracts. The cars in the sample had a mean of annual miles driven. Assume that the population is normally distributed. Is there support for the claim, at the level of significance, that the population mean number of miles driven annually by cars under the new contracts, is less than miles? Assume that the population standard deviation of miles driven annually was not affected by the change to the contracts. Perform a one-tailed test. Then answer the questions below.Carry your intermediate computations to three or more decimal places, and round your responses…A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of eight ounces of coffee per cup. If it dispenses more than that on average, the corporation may lose money, and if it dispenses less, the customers may complain.BIG Corporation would like to estimate the mean amount of coffee, μ, dispensed per cup by this machine. BIG will choose a random sample of cup amounts dispensed by this machine and use this sample to estimate μ. Assuming that the standard deviation of cup amounts dispensed by this machine is 0.42 ounces, what is the minimum sample size needed in order for BIG to be 90% confident that its estimate is within 0.07 ounces of μ? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements).
- Assist the statistician to construct a box whisker plot for the data on ``Expenditures per household living in Halifax’’ by computing the following: only the data on Halifax They are not different questions it's part of it!! thank you!The mean score and standard deviation of the test scores of students in Section 208 of a statistics course are 25.4 and 4.85 respectively while the mean score and standard deviation of the test scores of students in Section 209 in the course are 22.3 and 4.85 respectively. a) Which section did better on average? b) In which section are students scores less varied ?appcoulasc.comy student/assessment/6260690bba413c0009752bcd/dass/62324bac98e2d6000916675a/uta/6260693c6087c00009746b15/ten Question 11/12 > NEXT A BOOKMARK Lee records the height of players on a basketball team, and calculates the mean absolute deviation of the set of data. What does the mean absolute deviation of the set of data describe? O the average height of a player on the team the height of the tallest player on the team the difference in height between the shortest and tallest player the average difference in height between each player and the mean height acer
- Helpالوقت المتبقي: 41 دقائق، 04 ثانية )نوان(. :dlil Jlas! JL « » يقوم الانتقال إلى سؤال آخر بحفظ هذا الرد. 2 درجات 23 Jlgull A fisheries researcher wishes to test for a difference in mean weights of a single species of fish caught by fishermen in three different lakes in Nova Scotia. The significance level for the test will be 0.05. Complete the following partial ANOVA table and use it to answer questions. Source d.f Sum of squares Mean squares F-value Between Groups 17.04 Within Groups (Error) 9 Total 31.23 The value of F (test) for this test is: 0.1854 2.00 O 5.40 O 8.52 eT:19 ) へ 3.Consider trying to predict the life expectancy of citizens in a country based on the birth rate (per 1000 people) in that country. Here is a scatterplot of the data from a random sample of 50 countries. > ggplot (SampCountries, aes (BirthRate, LifeExpectancy)) + geom_point (color = "darkred")+ labs (title = "Life Expectancy by Birth Rate") + Life Expectancy by Birth Rate 80 - 70 - 10 20 30 40 BirthRate Here is (some of) the R output for the linear model for this data. > LifeBirth.lm summary (LifeBirth. lm) Call: Im (formula = LifeExpectancy BirthRate, data = SampCountries) Residuals: Min 10 Median 30 Маx -7.0592 -2.3047 0.9123 2.5019 5.8358 Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) 85.26295 1.03301 82.54 BirthRate -0.63291 0.04492 -14.09 Residual standard error: 3.424 on 48 degrees of freedom Multiple R-squared: 0.8053, Adjusted R-squared: 0.8012 F-statistic: 198.5 on 1 and 48 DF, p-value: < 2.2e-16 LifeExpectancy
- if you know that data ( 14, 10,12,10, 8,6) find the :- Mode, median, mean? Mode=10, Median=10, mean=12 O Mode=10, Median=11, mean=10 O Mode=12, Median=11, mean=10 O Mode=11, Median=10, mean=10 O الاختياراتIms.jazanu.edu.sa/webapps'assessment/take/take.jsp?course_assessment_id=91958 18course id%3 101884 1&content_id= 804450 1&question_num_8.x%=. Statistics lislI a الوقت المتبقي: 1 ساعة، 25 دقاق، 49 ثانية )ثوان(. حالة اكتمال الأسلة » يقوم الانتقال إلى سؤال آخر بحفظ هذا الرد. 1 درجات السؤال 8 If the p-value is less than alpha in a one-tail test, what conclusion can you draw? The null hypothesis should not be rejected. A two-tail test should be used. Alpha should be changed The null hypothesis should be rejected. K > يقوم الانتقال إلى سؤال آخر بحلظ هذا الرد. A
