Statistics question and answers for August 23, 2023
- Q Create a snowflake schema diagram (you do not have to mark everypossible level) and include your implicit assumptions for eachlevel of the dimension.Starting with the base cuboid [customer, date, product,store],...
- Q Question5. Please answer the following questions as either\"TRUE\" or \"FALSE\" (Write out either “True†or “Falseâ€)A. A normal distribution is characterized by its mean and itsdegrees of freedom. ______________B. A...
- Q A marketing organization wishes to study the effects of foursales methods on weekly sales of a product. The organizationemploys a randomized block design in which three salesman use eachsales method....
- Q Discussion Question 5.2: One of the assumptionsof the F test for comparing two variances is that both populationsare normally distributed. This is one of the assumptions in a longline of...
- Q 1. In a recent campus survey, 75 Indiana students were asked ifthey felt that their education at Cleary was preparing them fortheir future careers and 83% of students responded “Extremely...
- Q What’s the probability that a fair coin results in 12 or fewerheads from 40 flips? And What does that probability say about thefairness of the coin?
- Q The Excel file Stock Data contains monthlydata for several stocks and the S&P 500 Index (i.e., themarket).Compute Beta for NT and the S & P 500 using theCovariance/Variance relationship.Compute Beta...
- Q An IQ test scoring is designed to have mean of 100 and astandard deviation of 15. The scores are known to be normallydistributed. A principal at a private school wants...
- Q 1. Is there sufficient evidence to conclude that there is adifference in the mean number of hours of tv watched for those thatreported active lifestyle vs those that did not?DATA:Equal...
- Q Visit the NASDAQ historical prices weblink. First, set the daterange to be for exactly 1 year ending on the Monday that thiscourse started. For example, if the current term started...
- Q 1. In a random sample of male and female New York streetperformers between the ages of 22-35 you know that:The probability a man is a mime is 0.30.the probability a...
- Q Test the hypothesis using the​ P-value approach. Be sure toverify the requirements of the test. H0: p=0.91 versus H1:p≠0.9
- Q Describes at least 5 differences between the interpretation ofresults from an efficacy study and an effectiveness study (Minimum300 words)
- Q Please give an example of when using the probabilityan event will occur is important to decision making. Why?
- Q The following example comes from Statistics: Concepts andControversies, by David Moore and William Notz.Find an example of one of the following:1. Leaving out essential information2. Lack of consistency3. Implausible numbers4....
- Q Suppose x has a distribution with μ = 23 andσ = 18.(a) If a random sample of size n = 42 is drawn, findμx, σxand P(23 ≤ x ≤ 25)....
- Q Assume that a sample is used to estimate a population mean μμ.Find the 99.5% confidence interval for a sample of size 642 with amean of 22.2 and a standard deviation...
- Q Engineers concerned about a tower's stability have doneextensive studies of its increasing tilt. Measurements of the leanof the tower over time provide much useful information. Thefollowing table gives measurements for...
- Q Serum glutamic oxaloacetic transaminase (SGOT) is an enzyme thatelevates when the heart muscle is damaged. Assume that thepopulation distribution of SGOT levels in adults with healthyhearts is known to be...
- Q Suppose a coin is tossed 100 times and the number of heads arerecorded. We want to test whether the coin is fair. Again, a coinis called fair if there is...
- Q Question 4 Researchers studied four different blends of gasolineto determine their effect on miles per gallon (MPG) of a car. Anexperiment was conducted with a total of 28 cars of...
- Q 3. At Phil & Jims steak Shop in Parkside [best cheesesteak on the planet] they sell about 750 cheese steak sandwichesper day.They expect that the mix of sandwiches will be...
- Q OutcomeOutcome Met/Not Met/In ProcessEvidence1.Statistically significant difference between treatment andcomparison groups in mathematics grades 3–8T=3.626 P<3.0533536280097256E-42.Statistically significant difference between treatment andcomparison groups in science grades 4 & 8T=1.77P<0.078574882938539843a.Statistically significant difference between...
- Q In Lesson Seven you've learned to convert raw scores to standardscores and used the empirical rule to determine probabilitiesassociated with those standard scores.Random Decimal Fraction GeneratorHere are your random numbers:0.16130.85900.7911Use...
- Q Expected number of time intervals until the Markov Chain belowis in state 2 again after starting in state 2?Matrix:[.4,.2,.4][.6,0,.4][.2,.5,.3]
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