Statistics question and answers for August 30, 2023
- Q The Grocery Manufacturers of America reported that 65% ofconsumers read the ingredients listed on a product's label. Assumethe population proportion is p=0.65 and a sample of 500 consumersis selected from...
- Q Customers experiencing technical difficulty with their internetcable hookup may call an 800 number for technical support. It takesthe technician between 18 seconds and 13 minutes to resolve theproblem. The distribution...
- Q A =（1 −7 5 00 10 8 22 4 10 3−4 8 −9 6）(1) Count the number of rows that contain negativecomponents.(2) Obtain the inverse of A and count the...
- Q Comparing Statistical Studies Statistics are all aroundus, whether or not we notice them being used. From public policy,health, economics, science, culture to which foods a fast-foodrestaurant is going to serve...
- Q A study conducted by the Center for Population Economics at theUniversity of Chicago studied the birth weights of 618 babies bornin New York. The mean weight was 3404 grams with...
- Q Our bodies produce heat from the work of keeping us alive. Thisheat is known as the body temperature, which is continuous andapproximately normally distributed. The previous standard for ahealthy body...
- Q A manufacturer of chocolate chips would like to know whether itsbag filling machine works correctly at the 444 gram setting. It isbelieved that the machine is underfilling the bags. A...
- Q Given that in 4 flips of a fair coin there are at least two\"heads\", what is the probability that there are two \"tails\"? Thereare ten equally likely outcomes: 1, 2,...
- Q An undergraduate business student has purchased a laptopcomputer for use during exams. This laptop is perfectly reliableexcept for two parts: its microchip, which has a failure rate ofone in every...
- Q In order to win a game, a player must throw two fair dice andthe sum of the dice needs to be either 4 or less or 10 ormore for the...
- Q 1. The lengths of pregnancies in a small rural village arenormally distributed with a mean of 263 days and a standarddeviation of 13 days.In what range would you expect to...
- Q 1. Express theconfidence interval (35%,42%) in the form of p±ME.% ± %2.You are a researcherstudying the lifespan of a certain species of bacteria. Apreliminary sample of 35 bacteria reveals a...
- Q A 98% confidence interval for the average height of the adultAmerican male if a sample of 286 such males have an average heightof 59.3 inches with a population deviation of...
- Q Using traditional methods it takes 110.0 hours to receive abasic driving license. A new license training method using ComputerAided Instruction (CAI) has been proposed. A researcher used thetechnique on 50...
- Q In this exercise, we will look at descriptive statistics and howto explore and summarize data sets. For this, we use the HeartDisease dataset from the UCI data repository. This dataset...
- Q Thecollege Physical Education Department offered an Advanced First Aidcourse last summer. The scores on the comprehensive final exam werenormally distributed, and the z scores for some of the students areshown...
- Q Suppose a computer chip manufacturer rejects 1​% of the chipsproduced because they fail presale testing. Assume the bad chipsare independent. Complete parts a through d below​a) Find the probability that...
- Q A salesman normally makes a sale​ (closes) on 75​% of hispresentations. Assuming the presentations are​ independent, findthe probability of each of the following.​a) He fails to close for the first...
- Q The weights of 50 football players are listed below201240217283268212251263275208230288259225218236243247280234250236277255228268231269224259258231255202219245246271249255265235243245252246238257254284Construct the Frequency distributionCalculate the mode, 8th decile, 87thpercentile (both for Grouped and Ungrouped data)
- Q In a survey of 3939 ​adults, 705 say they have seen a ghost.Construct a​ 99% confidence interval for the population proportion.Interpret the results.A​ 99% confidence interval for the population proportion...
- Q There are quarters of sales data500,350,250,400450,350,200,300350,200,150,400550,350,250,550550,400,350,600750,500,400,650,850Using Minitab 18.0 Winter's time series forecasting methodforecast 3 quarters aheadThe weights are level=.2;trend=.2;seasonal=.2
- Q A certain article reported the following observations, listed inincreasing order, on drill lifetime (number of holes that a drillmachines before it breaks) when holes were drilled in a certainbrass alloy....
- Q The part diameters are normally distributed. The lower tolerancelimit corresponds to -2 z (minus two standard deviations below themean). The upper tolerance limit corresponds to 3 z. What percentof parts...
- Q Each box of Healthy Crunch breakfast cereal contains a couponentitling you to a free package of garden seeds. At the HealthyCrunch home office, they use the weight of incoming mail...
- Q Suppose you have a bag of 100 coins. Ninety of them are faircoins, which is P(H) = P(T) = 1/2. The other 10 coins are biased ,they have tail (T)...
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