You are interested to see if there is a difference in the student’s CGPA for the three different programmes: BB04, BB05, BB08 3A and BB08 3B. Test the claim that there is differences among the means at α = 0.05
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You are interested to see if there is a difference in the student’s CGPA for the
three different programmes: BB04, BB05, BB08 3A and BB08 3B. Test the claim that there is differences among the means
at α = 0.05
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- The table below contains the periodontal status of individuals and their sex. Periodontal status refers to gum disease where individuals are classified as either Healthy, have Gingivitis, or have Periodontal Disease (Perio). Female Male Total Healthy 2108 1124 3232 Gingivitis 1582 937 2519 Perio 873 931 1804 Find Pr{Gingivitis). If necessary, round your answer to 3 places after the decimal. Total 4563 2992 7555The highway department wants to estimate the proportion of vehicles on a Toll road at KM 25 between midnight and 5:00 A.M. The department head wanted to see how many 18-wheel tractor trailers passed along the road. These estimates will be used to determine road improvement and construction considerations and in road patrol planning. The department head asked researchers to calculate the estimated vehicles at different locations on the inter-island road over the past 7 days. Of the 3,481 vehicles counted, 927 were 18 wheelers. However, out of a total of 927, there were 74 who had accidents, so the sample was calculated based on the results of reducing the number of accidents. Determine the point estimate for the proportion of vehicles traveling on KM 25 during this time period which are 18 wheelers! (Assume the confidence level is 99%). What is the benefit of estimating the estimated value in this case (analyze the answers you have obtained)?Read the box "The Return to Education and the Gender Gap." The Return to Education and the Gender Gap Dependent variable: logarithm of Hourly Earnings. * Regressor Years of education Female Female x Years of education Potential experience Potential experience² Midwest South West Intercept (1) 0.1035** (0.0009) 1.533" (0.012) 0.208 (2) 0.1050** (0.0009) -0.263** (0.004) 1.629" (0.012) 0.1001" (0.0011) 0.258 -0.432** (0.024) 0.0121" (0.0017) 1.697** (0.016) (4) 0.1013** (0.0012) 0.258 -0.451" (0.024) 0.0134" (0.0017) 0.0136** (0.0012) -0.000184** (0.000021) -0.095" (0.006) -0.092** (0.006) -0.028"* (0.007) 1.328" R² The sample size is 52,970 observations for each regression. Female is an indicator variable that equals 1 for women and 0 for men. Midwest, South, and West are indicator variables denoting the region of the United States (0.023) 0.267
- The number of cavities that thirty-year-old Americans have had in their lifetimes is 8. Do twenty- average year-olds have a different number of cavities? The data show the results of a survey of 16 twenty-year-olds who were asked how many cavities they have had. Assume that the distrbution of the population is normal. 6, 12, 8, 6, 10, 6, 8, 11, 8, 8, 6, 7, 6, 10, 7, 11 What can be concluded at the a = 0.10 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: 2 Select an answer V 7v||Select an answerY c. The test statistic ? (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 ?v f. Based on this, we should Select an answer v the null hypothesis. g. Thus, the final conclusion is that lor O The data suggest that the population mean number of cavities for twenty-year-olds is not significantly different from 8 at a = 0.10, so there is…The highway department wants to estimate the proportion of vehicles on a Highway at KM 25 between midnight and 5:00 A.M. The head of the department wants to see how many 18-wheel tractor trailers pass on the road. These estimates will be used to determine highway repairs and construction considerations and in highway patrol planning. The department chief asked investigators to calculate estimates of vehicles at different locations on inter-island roads over the past 7 days. From 3,481 vehicles counted there are 927 are 18-wheel drive. However, out of the total 927, there were 51 vehicles that had accidents so that the sample was calculated based on the results of a reduction in the number of accidents. Specify an approximate point for the proportion of vehicles performingtravel on KM 25 during this time period which is an 18-wheeled vehicle!(Assume the confidence level is 99%). What are the benefits of estimating value estimates in this case (analysis of the answers you have obtained)?Suppose Laura, a facilities manager at a health and wellness company, wants to estimate the difference in the average amount of time that men and women spend at the company's fitness centers each week. Laura randomly selects 15 adult male fitness center members from the membership database and then selects 15 adult female members from the database. Laura gathers data from the past month containing logged time at the fitness center for these members. She plans to use the data to estimate the difference in the time men and women spend per week at the fitness center. The sample statistics are summarized in the table. Population Populationdescription Population mean(unknown) Samplesize Sample mean(min) Sample standarddeviation (min) 11 male μ1 n=15 x¯1=137.7 s=51.7 22 female μ2 n=15 x¯2=114.6 s=34.2 df=24.283 The population standard deviations are unknown and unlikely to be equal, based on the sample data. Laura plans to use the two-sample ?-t-procedures to estimate the…
- How to construct Scatterplot?Section 8.2 Homework x + //cypresscollege.instructure.com/courses/29586/assignments/814916 Question 7 es S 33 Assume 11% of the population is left-handed. Assume this percentage is also true for all college students. A random sample of 245 college students from a campus with 6125 students is taken and whether or not they are left-handed is recorded. List the given information with the correct symbols: ?= 0.11 ?= 245 = 6125 a) Identify the individual, variable, random variable X and the random variable in the context of this problem. The individual is Select an answer The variable information collected from each individual is Select an answer The wording in context for the random variable X is as follows: X Select an answer The wording in context for the random variable is as follows: p- Select an answer b) Can we say that the sampling distribution of p is approximately normal? ? Because np(1-p) = which is ? Round to one decimal place. c) What is the probability that no more than 9% of…A company receives complaints about their product bending and needs to determine how many faulty products are going undetected. The company uses a scanning device that places a mark on each defective product that it detects on the production line. However not all defective products are detected by the scanner, and sometimes it marks a product which is not defective. When a product is not defective, the scanner marks it 5% of the time. When a product is defective, the scanner marks it 98% of the time. The quality control department reports that 4% of all products are defective. Which option will calculate the probability that the product is marked?
- An insurance company hires an actuary to determine whether the number of hours of safety drivingclasses can be used to predict the number of driving accidents for each driver. Identify theexplanatory variable, if any.Total value for digit 5UCLA conducted a survey of more than 263,000 college freshmen from 385 colleges in fall 2005. The results of students' expected majors by gender were reported in The Chronicle of Higher Education (2/2/2006). Suppose a survey of 5,000 graduating females and 5,000 graduating males was done as a follow-up last year to determine what their actual majors were. The results for females are shown in the table below. The second column in the table does not add to 100% because of rounding. Conduct a goodness-of-fit test to determine if the actual college majors of graduating females fit the distribution of their expected majors. (Use a significance level of 0.05.) Major Women - Expected Major Women - Actual Major Art & Humanities 14.0% 670 Biological Sciences 8.4% 410 Business 13.1% 685 Education 13.0% 650 Engineering 2.6% 145 Physical Sciences 2.6% 125 18.9% 975 Professional 13.0% 605 Social Sciences 15 Technical 0.4% 300 Other 5.8% 420 Undecided 8.0% What is the test statistic? (Round your…