請問大一統計學這兩題有人看得懂嗎🥲

2. To study the attitude of mother and father towards their daughter participating in the outdoor games, a sample of 200 fathers and 250 mothers was investigated. In these two samples, 120 fathers and 50 mothers preferred their daughter to go for outdoor activities. Can it be concluded at a=0.01 level of significance that the proportion of father is significantly higher than that of mother in preferring their daughters for outdoor activities? 3. A firm has a generous but rather complicated policy concerning end-of-year bonuses for its lower-level managerial personnel. The policy's key factor is a subjective judgment of "contribution to corporate goals." A personnel officer took samples of 24 female and 36 male managers to see whether there was any difference in bonuses, expressed as a percentage of yearly salary. The data are listed here: Gender Bonus Percentage Female 9.2, 7.7, 11.9, 6.2, 9.0, 8.4, 6.9, 7.6, 7.4, 8.0, 9.9, 6.7, 8.4, 9.3, 9.1, 8.7, 9.2, 9.1, 8.4, 9.6, 7.7, 9.0, 9.0, 8.4 10.4, 8.9, 11.7, 12.0, 8.7, 9.4, 9.8, 9.0, 9.2, 9.7, 9.1, 8.8, 7.9, 9.9, 10.0, 10.1, 9.0, 11.4, 8.7, 9.6, 9.2, 9.7, 8.9, 9.2, 9.4, 9.7, 8.9, 9.3, 10.4, 11.9, 9.0, 12.0, 9.6, 9.2, 9.9, 9.0 (1) Is there significant evidence that the mean bonus percentage for males is larger than the mean bonus percentage for females? Use a a=0.05. (2) Estimate the difference in the mean bonus percentages for males and females using a 95% confidence interval. Male

請問這題怎麼解，感謝🙏

NET POPULATION GROWTH A study indicates that x months from now, the population of a certain town will be increasing at the rate of 10 + 2Vx people per month. By how much will the population increase over the next 9 months?

SCENARIO 8-3 To become an actuary, it is necessary to pass a series of 10 exams, including the most important one, an exam in probability... 繼續閱讀

大一公衛系微積分，求第二題解

公衛系 微積分期末考 (28/12/2018) 1. Use the Laplace transform to solve the differential equations. (1) j(t)+2y(t) = x(t), y(0)=1, x(t)=10, t20 (20) (2) Intravenous glucose is a treatment. Disposed at a fixed rate k grams per minute inputs into the blood, while blood glucose will be converted to other substances or moved to another place, at a rate proportional to the amount of glucose in the blood, the proportionality constant is a (a> 0), the initial amount of glucose in the blood is M. A. Find the variation in the amount of glucose in the blood (15) B. Determining the equilibrium, the amount of glucose in the blood. (5) = 2. SI Epidemic Model : The size of the population, n+1, remains fixed. Let i(t) be the number of infectives at time t, and let s(t) be the number of individuals who are susceptible. Given an initial number of infectives iO), we would like to know what will happen to i(t). SI Epidemic Model is described by the differential equation. di(t) = k·i(t).s(t) ......(5.1) dt i(t)+s(t)=n+1 i(0)=i, (1) Solve this differential equation of the SI Epidemic Model (5.1). (10 h) (2) What is the peak times t of the epidemic spread? (10) 3. Consider the Two-compartment physiological models and is shown in figure 1. C1 (t) represent the drug concentration in the first compartment and C2 (t) represents the drug concentration in the second compartment. Vi and V2 represent the compartment volume. Use the first order linear differential equation general solution to solve the C1 (t) (20 ) and use the Laplace transform to solve C2 (t). 【20 分). | 世」!()

請問這題⋯

3. If f(x) = et – 2,0 < x < 2, find the Riemann sum with n = 4 correct to six decimal places, taking the sample points to be midpoints. What does the Riemann sum represent? Illustrate with a diagram.

求救 統計 #8 （可支薪）

8. The NBI data were analyzed and the results made available at the FHWA Web site. Using the FHWA inspection ratings, each of the 608,272 highway bridges in the US was categorized as structural deficient, functionally obsolete, or safe. About 13.5% of the bridges were found to be structural deficient, while 3.5% were functionally obsolete. a. What is the variable of interest to the researchers? b. Is the variable of part a quantitative or qualitative? c. Is the data set analyzed a population or a sample? Explain. d. How did the NBI obtain the data for the study?

急 求救統計 #6 （可支薪）

6.The National Science Foundation (NSF) sponsored a study on girls participation in informal science, technology, engineering, or mathematics (STEM) programs. The results of the study were published in Cascading Influences: Long-Term Impacts of Informal STEM Experiences for Girls (March 2013). The researchers sampled 174 young women who recently participated in a STEM program. They used a pie chart to describe the geographic location (urban, suburban, or rural) of the STEM programs attended. Of the 174 participants, 107 were in urban areas, 57 in suburban areas, and 10 in rural areas. a. Determine the proportion of STEM participants from urban areas. b.Determine the proportion of STEM participants from suburban areas. c.Determine the proportion of STEM participants from rural areas. d. Multiply each proportion in parts a-c by 360 to determine the pie slice size (in degrees) for each location. e.Use the results, part d, to construct a pie chart for geographic location of STEM participants. f.Interpret the pie slice for urban areas. g.Convert the pie chart into a bar graph. Which, in your opinion, is more informative?

急！求救 #6 8 9 如果需要酬勞可私下談 （ex.$70題）

pie participation in informal 6.The National Science Foundation (NSF) sponsored a study on girls' science, technology, engineering, or mathematics (STEM) programs. The results of the study were published in Cascading Influences: Long-Term Impacts of Informal STEM Experiences for Girls (March 2013). The researchers sampled 174 young women who recently participated in a STEM program. They used a pie chart to describe the geographic location (urban, suburban, or rural) of the STEM programs attended. Of the 174 participants, 107 were in urban areas, 57 in suburban areas, and 10 in rural areas. a.Determine the proportion of STEM participants from urban areas. b.Determine the proportion of STEM participants from suburban areas. c.Determine the proportion of STEM participants from rural areas. d. Multiply each proportion in parts a-c by 360 to determine the pie slice size (in degrees) for each location. e.Use the results, part d, to construct a pie chart for geographic location of STEM participants. f.Interpret the pie slice for urban areas. g.Convert the pie chart into a bar graph. Which, in your opinion, is more informative? 7. All high way bridges in the US are inspected periodically for structural deficiency by the FHWA. Data from the FHWA inspections are compiled into the National Bridge Inventory (NBI). Classify each variable below as quantitative or qualitative. a. Length of maximum span (feet). b. Number of vehicle lanes. c. Toll bridge (yes or no). d. Average daily traffic. e. Condition of deck (good, fair, or poor). f. Bypass or detour length (miles). g. Route type (interstate, U.S., state, county, or city) 8. The NBI data were analyzed and the results made available at the FHWA Web site. Using the FHWA inspection ratings, each of the 608,272 highway bridges in the US was categorized as structural deficient, functionally obsolete, or safe. About 13.5% of the bridges were found to be structural deficient, while 3.5% were functionally obsolete. a. What is the variable of interest to the researchers? b. Is the variable of part a quantitative or qualitative? c. Is the data set analyzed a population or a sample? Explain. d. How did the NBI obtain the data for the study?

求題目C🙏

he Secant line PO jpo 全 slope of tangent line GZ+ 全 bs 二Instantaneous velocity i i $ which is the same as the average velocity over the time interval [lg,d 十 四. Therefore 7 e the velocity at time # 三 d (the limit of these average velocities as娘 approaches 0) must 7 [be equal to the slope of the tangent line at (the limit of the slopes of the secant lines). Examples 1 and 2 show that in order to Solve tangent and velocity problems we must be able to find limits. After Studying methods for computing limits in the next four sec- tions, we Will return to the problems of finding tangents and velocities in Chapter 2 FIGURE 4 kk 1.4 EXERCISES , 1. ,A tank holds 1000 liters of water, which drains from the (a) IPis the point (15, 250) on the graph of V, find the bottom of the tank in half an hour. The values in the table slopes of the secant lines PO when O is the point on the show the volume / of water in the tank (in liters) graph_ with 二5, 10, 20,25,and 30. (b) .Estimate the slope ofthe tangent line 午 吃by averaging after 7 minutes- the slopes of two secant lines. | fr(min) S$ 2 30 (c) Use agraph of the function to estimate the slope of the tangent line at P. (This slope Tepresents the rate at which | YOD 28 必 the Water is 1s siowing, from the tank after 15 minutes.)

1.7 不懂為什麼不是description statistics 是因為後面的change 有經過計算嗎

說 a.。 Opservationaj Study p. Designed experiment 1.6 Fi im the following blank: veal only asSociatior 3 : 1, Whereas 1 : aS de sd experiments can help ee de Signed experimenmt Ca k Observational Studies can Te- Applying the Concepts and skills 7y? 乜AVe7ce7'yec'y 了有 C/qQsSz7 cogce7 5 。 707 7 5/7/cs 5 27儿er Zesc77- ZUe O7 7727e7e72777. 二\ 了 7 yozr yye7s, 人執 4 ata from a sample of Americans ylelded te following &Stimates of average TV Viewing time per month for 引! Americans 2years old and older. The times are in hours and minutes; Q1 stands for first quarter. [SOURCE: 7/iz Cyoss-7P7d//o7gj 和ez2oz7z, Quarter 1, 2011. Published by The Nielsen Company, 1.7 TV Yiewing Times, @ 2011. _Tmferemti A 一cc二 生玖 AA二和多吃ttOCG Yiewing method Q12011|Q12010|Change (%) Watching TV in the home 說3 Watching timeshifted TV 1人 DVR plJayback 各 Using 了e Internet on a CoInputer 一1.4 Watching video on the Jnternet 34.5 Mobile subscribers watching 20.0 Video on amobile phone ].8 Professional Athlete Salaries. From the Sfgfsfcd/ Asfrdc/ 9 加8 EE 乃e Cuzreg Sogfes and the article “Average Salarles lm the NBA,N Ibutor 人 i blished on the Yahoo! Contm: MJPB and NHL by J 、Do is 和 還 1.10 drui 六/r yea ent av: