【正文】 在雙因素有交互作用的方差分析中，設(shè)因素有3個水平，因素有2個水平，每個 處理重復(fù)兩次試驗，則試驗誤差平方和的自由度 6 。 （ ）二、單項選擇題（每小題2分，本題共18分）設(shè)則。二維隨機變量的分布函數(shù)。二項分布 泊松分布 均勻分布 正態(tài)分布 以下哪一個MINITAB命令用于作回歸分析。 設(shè)總體，對檢驗水平，欲檢驗方差由容量為的一個樣本計算出來的統(tǒng)計量的觀察值應(yīng)與作比較。 設(shè)是總體的一個樣本，則總體方差的矩法估計量是。解：設(shè)表示5件產(chǎn)品中次品的數(shù)目，則 （2分）所求的概率為 （3分） （2分） （1分）以下是某農(nóng)作物對三種土壤，四種肥料，每一個處理作三次重復(fù)試驗后所得產(chǎn)量的方差分析表的部分?jǐn)?shù)據(jù)，完成方差分析表并寫出分析結(jié)果。 （3分）某工廠生產(chǎn)的一種電子設(shè)備的壽命（以1000小時為單位）服從以為參數(shù)的指數(shù)分布。但是，如果，則工廠承擔(dān)全部退款。解： （4分） 令表示一件產(chǎn)品的利潤，則的分布律為：（分布律：2分）一件產(chǎn)品的期望利潤（元） （4分）某工廠生產(chǎn)的某種產(chǎn)品的合格率為92%，假定質(zhì)檢系統(tǒng)是經(jīng)過簡化的，對合格品以96%的概率給出合格的結(jié)果，對不合格品同樣以96%的概率給出不合格的結(jié)果。 則產(chǎn)品經(jīng)質(zhì)檢后為合格品的概率： （4分） 一件經(jīng)檢驗為合格品的產(chǎn)品確是合格品的概率為： （4分）假定某種電池的工作時間服從正態(tài)分布，觀察五個電池的工作時間（小時）為： 32，41，42，49，53．問這批樣本是否取自均值為50（小時）的總體？（） （）解法一：已知 檢驗假設(shè)： （2分）因為總體方差未知，所以用T統(tǒng)計量作檢驗： （2分）由樣本計算得的觀察值為： （2分）所以接受假設(shè)，可以認(rèn)為這批樣本是取自均值為50（小時）的總體。 （2分）設(shè)二維隨機變量的聯(lián)合概率密度函數(shù)如下，試求，并問與是否相互獨立？解：（1） （2分） （2） （2分） （2分）顯然, 。 （2分）已知隨機變量的概率密度函數(shù)為，求的分布函數(shù) 及事件的概率。s National Basketball Association (WNBA) playoffs. And it has also made American heroes out of its player and coach legends like Michael Jordan, Larry Bird, Earvin Magic Johnson, Sheryl Swoopes, and other great players. At the heart of the game is the playing space and the equipment. The space is a rectangular, indoor court. The principal pieces of equipment are the two elevated baskets, one at each end (in the long direction) of the court, and the basketball itself. The ball is spherical in shape and is inflated. Basketballs range in size from in (7276 cm) in circumference, and in weight from 1822 oz (510624 g). For players below the high school level, a smaller ball is used, but the ball in men39。s ball is in (7274 cm) in circumference. The covering of the ball is leather, rubber, position, or synthetic, although leather covers only are dictated by rules for college play, unless the teams agree otherwise. Orange is the regulation color. At all levels of play, the home team provides the ball. Inflation of the ball is based on the height of the ball39。s Christian Association (YMCA), which later became Springfield College. Naismith (18611939) was a physical education teacher who was seeking a team sport with limited physical contact but a lot of running, jumping, shooting, and the handeye coordination required in handling a ball. The peach baskets he hung as goals gave the sport the name of basketball. His students were excited about the game, and Christmas vacation gave them the chance to tell their friends and people at their local YMCAs about the game. The association leaders wrote to Naismith asking for copies of the rules, and they were published in the Triangle, the school newspaper, on January 15,1892. Naismith39。 the ball was the objective. To score, the ball had to be shot through a horizontal, elevated goal. The team with the most points at the end of an allotted time period wins. Early in the history of basketball, the local YMCAs provided the gymnasiums, and membership in the organization grew rapidly. The size of the local gym dictated the number of players。s original players were Canadians, and the game spread to Canada immediately. It was played in France by 1893。 Australia, China, and India between 1895 and 1900。 its construction and size of 30 in (76 cm) were ruled official in 1949. The rulesetters came from several groups early in the 1900s. Colleges and universities established their rules mittees in 1905, the YMCA and the Amateur Athletic Union (AAU) created a set of rules jointly, state militia groups abided by a shared set of rules, and there were two professional sets of rules. A Joint Rules Committee for colleges, the AAU, and the YMCA was created in 1915, and, under the name the National Basketball Committee (NBC) made rules for amateur play until 1979. In that year, the National Federation of State High School Associations began governing the sport at the high school level, and the NCAA Rules Committee assumed rulemaking responsibilities for junior colleges, colleges, and the Armed Forces, with a similar mittee holding jurisdiction over women39。s game changed radically in 1971 when separate rules for women were modified to more closely resemble the men39。s game by recognizing it as an Olympic event in 1976. Again, tel