Statistics question and answers for July 18, 2023
- Q A manufacturer knows that their items have a normallydistributed lifespan, with a mean of 2.2 years, and standarddeviation of 0.7 years.If you randomly purchase 3 items, what is the probability...
- Q Daily demand for cat litter at the Cat Café in Jones is 1500ounces with a standard deviation of300 ounces. The average lead time is 5 days and the standarddeviation of...
- Q he table below gives the list price and the number of bidsreceived for five randomly selected items sold through onlineauctions. Using this data, consider the equation of the regressionline, y^=b0+b1x...
- Q Ms. Smith teaches three Algebra I classes that cover exactly thesame content. She is wondering if changing the order of some of thelessons would be beneficial to students. In class...
- Q Question 8 A factory uses a diagnosis test whether a part isdefective or not. This test has a 0.90probability of giving a correct result when applied to a defectivepart and...
- Q 248259268272277280282283285285286289290292294295295298310501Because the mean is very sensitive to extreme​ values, it is nota resistant measure of center. By deleting some low values andhigh​ values, the trimmed mean is more resistant. To...
- Q Let x be a random variable that represents the averagedaily temperature (in degrees Fahrenheit) in July in a town inColorado. The x distribution has a mean μ ofapproximately 75°F and...
- Q 10. According to the National Health and Nutrition ExaminationSurvey and the Epidemiologic Follow-up Study the mean systolicblood pressure for individuals aged 25 to 59 is 127.3 with astandard deviation of...
- Q A test for a disease gives a correct positive result with aprobability of 0.95 when the disease is present but gives anincorrect positive result (false positive) with a probability of0.15...
- Q A small car dealer, who is eager to estimate his inventory cost,can hold upto 4 cars in the showroom. The periodic demand for the cars isfollowing a Poissondistribution with mean...
- Q Describe an application of multiple discriminant analysis thatis specific to your industry(Scientific Research) or to youracademic interests. Explain why this technique is suitable in termsof measurement scale of variables and...
- Q Using samples of 194 credit card statements, an auditor foundthe following:Use Table-A.Sample1234Number with errors31612a. Determine the fraction defective in each sample.(Round your answers to 4 decimal places.)Â Â SampleFraction defective1234b.If the true...
- Q Healthy LifestylesThe Centers for Disease Control and Prevention (CDC) in Atlanta,Georgia, is the government agency responsible for disease-relatedissues in the United States. The CDC coordinates efforts tocounteract outbreaks of diseases...
- Q Given a random variable X following normal distribution withmean of -3 and standard deviation of 4. Then random variableY=0.4X+5 is also normal.(1)Find the distribution of Y, i.e. μy,σy(2)Find the probabilities...
- Q When people buy a certain type of laptop, there are three mostpopular upgrading options: upgrade the RAM (A), upgrade the harddrive (B), upgrade the graphic card (C). If 50% of...
- Q Given a random variable XX following normal distribution withmean of -3 and standard deviation of 4. Then random variableY=0.4X+5Y=0.4X+5 is also normal.(1)(2pts) Find the distribution of YY, i.e. μY,σY.μY,σY.(2)(3pts) Find...
- Q Let p1,p2 denote the probability that a randomly selected maleand female, respectively, has allergy to nuts. Let n1,n2 be thesample size of a random sample for male and female, respectively.Assume...
- Q Two marbles are drawn at random and with replacement from a boxcontaining 2 red, 3 green, and 4 blue marbles. Let's define thefollowing events: A = {two red marbles are...
- Q A study of 420,047 cell phone users found that 130 of themdeveloped cancer of the brain or nervous system. Prior to thisstudy of cell phone​ use, the rate of such...
- Q Twelve different video games showing substance use were observedand the duration of times of game play​ (in seconds) are listedbelow. The design of the study justifies the assumption that thesample...
- Q A food safety guideline is that the mercury in fish should bebelow 1 part per million​ (ppm). Listed below are the amounts ofmercury​ (ppm) found in tuna sushi sampled at...
- Q An elementary school is offering 3 language classes: one inSpanish, one in French, and one in German. These classes are opento any of the 89 students in the school. There...
- Q If an infected person is tested for corona, the probability thatthe test will give a positive result is 0.60 and if this person isnot infected the probability that it will...
- Q How probability and statistics are related?Explain the role of probability in statistics according to thefollowing rules:Your posts must be written according to the followingcriteria:Must demonstrate your understanding of the topic.Connections...
- Q Recall from Example 1 that whenever Suzan sees a bag of marbles,she grabs a handful at random. She has seen a bag containing fourred marbles, two green ones, five white...
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