Statistics question and answers for July 04, 2023
- Q A system consisting of two components is subject to a series ofshocks that arrive according to a Poisson process with a rate ofone per day. Half the shocks cause no...
- Q A 2^3 design is confounded in 4 blocks of size 2. The principalblock contains treatments (1) and abc. Another block contains a.What is the second element of that block. (b,...
- Q A research group conducted an extensive survey of2942 wage and salaried workers on issues rangingfrom relationships with their bosses to household chores. The datawere gathered through hour-long telephone interviews with...
- Q Two Sample Hypothesis TestShow all five steps in your analysis. To get full credit youmust label the CV (critical value) and TV (Test Value) in yourdrawing. Use the p-value for...
- Q Overproduction of uric acid in the body can be an indication ofcell breakdown. This may be an advance indication of illness suchas gout, leukemia, or lymphoma.†Over a period of...
- Q Foot Locker uses sales per square foot as a measure of storeproductivity. Last year, the mean annual sales per square foot was$410 with a standard deviation of $54.38. Suppose you...
- Q A researcher wishes to estimate the proportion of adults whohave high-speed internet access. What size sample should beobtained if she wishes the estimate to be within 0.01 with 90%confidence if...a....
- Q Read each problem carefully andclearly show all work.Indicate calculator functions used (ie T-Test,2-SampTTest, etc) as well as calculator entriesState yourconclusions in terms of the context of theproblem.Does the time of...
- Q Phenomenology or case study? Ethnography or historical?Content analysis or grounded theory? Which research design (andwhy) would be best to use for a qualitative study on school cultureand teacher turnover?
- Q 1. Following the UK referendum in 2016, 910 randomly sampled UKvoters were asked which of the following options they agreed mostwith (i) the UK should negotiate an exit deal with...
- Q 3. The Mathematics & Statistics department at LancasterUniversity claims that, on average, 25% of students obtain a firstclass degree. A competitor university is interested in showing thatthis value is an...
- Q Questions 18 – 28. A researcher is interested in whetherpsychology students are less happy than other students. The meanhappiness score for the population is 8. The researcher administersa happiness scale...
- Q A bank wants to evaluate which credit card would be moreattractive to its customers, one with a high interest rate forunpaid balances but no annual fee or one with a...
- Q An elevator has a placard stating that the maximum capacityis16201620lblong dash—1010passengers.​ So,1010adult male passengers can have a mean weight of up to1620 divided by 10 equals 162 pounds.1620/10=162 pounds.If the...
- Q When σ is unknown and the sample is of size n≥ 30, there are two methods for computing confidence intervals forμ. (Notice that, When σ is unknown andthe sample is...
- Q Urban traffic congestion throughout the world has beenincreasing in recent​ years, especially in developing countries.The accompanying table shows the number of minutes that randomlyselected drivers spend stuck in traffic in...
- Q Suppose that a consumer advocacy group would like to conduct asurvey to find the proportion p of smartphone users thatwere happy with their smartphone. The advocacy group took a randomsample...
- Q 4. The university is interested in determining if the proportionof graduates obtaining a first-class degree has changed from 2016to 2017. Out of 2800 graduates in 2016, 560 obtained a first...
- Q asnwer the following questionsAssume you get the following M&M’s in your bag:BlueOrangeGreenYellowRedBrownTotal10141592656Now assume that your group of 4 students had the following numberscombined:BlueOrangeGreenYellowRedBrownTotal4047242424151741- Pick one of the colors. For this...
- Q a) An article reported that, in a study of a particular waferinspection process, 356 dies were examined by an inspection probeand 177 of these passed the probe. Assuming a stable...
- Q 2. The lifetime of light bulb is normally distributed with meanof 1400 hours and standard deviation of 200 hours.a. What is the probability that a randomly chosen light bulbwill last...
- Q A researcher claimed that less than 20% of adults smokecigarettes. A Gallup survey of 1016randomly selected adults showed that 17% of the respondents smoke.Is this evidence to support theresearcher’s claim?(a)...
- Q Var1Var2Confidence Level95%113141125137RESULTS134126Group 1Group 2120121n132116Mean120154Std Dev121160SE119155tSpMargin of ErrorPoint EstimateLower LimitUpper Limit
- Q 1. Let  z be a normal random variable with mean 0 andstandard deviation 1. What is P(-2.25 <  z <-1.1)?0.12350.36430.86430.4878You are offered an investment opportunity. Its outcomes andprobabilities are presented in the...
- Q A coin was flipped 72 times and came up heads 44 times. At the.10 level of significance, is the coin biased toward heads? (a-2)Calculate the Test statistic. (Carry out all...
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