Statistics question and answers for December 13, 2023
- Q Multiple choice questions each have five possible answers a b c d e one of which is correct Assume that you guess the answers to three such questions a Use...
- Q Based on a survey assume that 54 of consumers are comfortable having drones deliver their purchases Suppose we want to find the probability that when five consumers are randomly selected...
- Q stion 2 stion 3 The mean is sleepwalker s Round to one decimal place as needed able of numbers of sleepwalkers and robabilities X0123 P x 0 168 0 364...
- Q There is a 0 9985 probability that a randomly selected 33 year old male lives through the year A life insurance company charges 199 for insuring that the male will...
- Q Based on a poll among adults who regret getting tattoos 19 say that they were too young when they got their tattoos Assume that nine adults who regret getting tattoos...
- Q Find the following probabilities for the standard normal random variable a P 0 75 z 1 36 b P 1 79 z 0 75 0 c P z 1 74...
- Q According to a poll about 16 of adults in a country bet on professional sports Data indicates that 47 1 of the adult population in this country is male Complete...
- Q the problem The weights of certain machine components are normally distributed with a mean of 8 81 g and a standard deviation of 0 06 g Find the two weights...
- Q Find the indicated probability In one region the September energy consumption levels for single family homes are four to be normally distributed with a mean of 1050 kWh and a...
- Q Human body temperatures are normally distributed with a mean of 98 20 degrees F and a standard deviation of 0 62 degrees F If 19 people are randomly selected find...
- Q For women aged 18 24 systolic blood pressures in mm Hg are normally distributed with a mean of 114 8 and a standard deviation of 13 1 If 23 women...
- Q For a parallel structure of identical components the system can succeed if at least one of the components succeeds Assume that components fail independently of each other and that each...
- Q A certain grade egg must weigh at least 2 oz If the weights of eggs are normally distributed with a mean of 1 5 oz and a standard deviation of...
- Q Assume that X has a normal distribution and find the indicated probabil The mean is 15 2 and the standard deviation is 6 0 9 Find P 14 3 X...
- Q If Z is a standard normal variable find the probability The probability that Z lies between 0 and 2 73 O 0 5032 O the answer is none of these...
- Q In airline applications failure of a component can result in catastrophe As a result many airline components utilize something called triple modular redundancy This means that a critical component has...
- Q The probability that a randomly selected 1 year old male feral cat will live to be 2 years old is 0 98037 a What is the probability that two randomly...
- Q A random sample of 1953 adults was taken and they were asked if they prefer watching sports movies or news on tv They were also asked if they preferred dogs...
- Q College students average 8 2 hours of sleep per night with a standard deviation of 35 minutes If the amount of sleep is normally distributed what proportion of college students...
- Q The answer above is NOT correct The shelf life of a batteries produced by one major company are normally distributed with a mean of 3 9 years and a standard...
- Q 2 50 points eBook Karla Tanner opens a web consulting business called Linkworks and completes the following transactions in its first month of operations Prepare journal entries for each transaction...
- Q ning scenario mining company owns two mines each of which produces three grades high medium and low of ore The company has a contract to supply a smelting company with...
- Q ign and low of ore mpany has a contract to supply a smelting company with at least 12 tons of high grade ore at least 8 tons of medium grade...
- Q In a large city school system with 35 elementary schools the school board is considering the adoption of a new policy that would require elementary students to pass a test...
- Q An experiment investigates a dietary approach to treating anxiety disorder Researchers randomly assigned 29 subjects to two treatment groups one taking a high dose of vitamin c and the other...
- Q An experiment that showed that high doses of omega 3 fats might be of benefit to people with bipolar disorder involved a control group a Who are the individuals being...
- Q Marcos purchases a top up card for his pre paid cell phone His remaining balance B can be modeled by the equation B 25 0 35n where n is the...
- Q Find y if xy yx y
- Q 0 3 4 9 1 1 2 Round all final answers to 2 decimal places a Q 1 b Med 2 c Q3 4 d IQR 3 e Identify the...
- Q The number of children in seven families looked like this 0 3 4 9 1 1 2 Round all final answers to 2 decimal places a Q b Med
- Q Capacity and price data for a collection of USB flash drives is displayed in the table below Capacity Gb Price 8 9 99 16 11 99 32 17 99 64...
- Q The grades for a sample of 20 students on the most recent exam are given in the data table below Round yo answers to 2 decimal places as needed 88...
- Q 250 people are asked how many siblings they have The incomplete results are shown below Please use 4 decimal places when apply of Siblings Frequency Relative Frequency Cumulative Frequency 0...
- Q The widths of platinum samples manufactured at a factory are normally distributed with a mean of 1 4 cm and a standard deviation of 0 1 cm Find the z...
- Q A doctor gives some of the patients a new drug for treating acne and the rest of the patients receive the olc drug Neither the patient nor the doctor knows...
- Q One group is told to exercise and one group is told to not exercise Is this a blind experiment double blind experiment or neither Why O Blind The groups are...
- Q 43 87 of voters turned out for the 2004 elections Parameter Statistic
- Q Determine whether the value is a parameter or statistic In a random sample of 90 students who passed statistics 65 used statistics in their future career Statistic O Parameter
- Q Over a period of a few years the population of Denver increased It was observed that during this period the correlation between the number of people attending church and the...
- Q Match the name of the sampling method descriptions given de dividing the population by Gender and choosing 30 people of each gender b pulling 50 names from a hat casking...
- Q The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the eighth grade level In an earlier study the population...
- Q Are the following variables discrete or continuous a a person s age as listed on a driver s license discrete b the number of cars served at a fast food...
- Q At the local college a study found that students earned an average of 13 8 credit hours per semester A sample of 118 students was taken What is the best...
- Q A fast food restaurant executive wishes to know how many fast food meals adults eat each week They want to construct a 90 confidence interval for the mean and are...
- Q The electric cooperative needs to know the mean household usage of electricity by its non commercial customers in kWh per day They would like the estimate to have a maximum...
- Q An environmentalist wants to find out the fraction of oil tankers that have spills each month Step 2 of 2 Suppose a sample of 313 tankers is drawn Of these...
- Q Out of 178 randomly selected adults in the United States who were surveyed 77 exercise on a regular basis Construct a 95 confidence interval for the proportion of all adults...
- Q NASA is conducting an experiment to find out the fraction of people who black out at G forces greater than 6 In an earlier study the population proportion was estimated...
- Q An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars over domestic Step 1 of 2 Suppose a sample of 3482 new car buyers...
- Q A survey of 142 randomly selected students at one college showed that only 82 checked their campus email account on a regular basis Construct a 95 confidence interval for the...
- Q A software developer wants to know how many new computer games people buy each year A sample of 219 people was taken to study their purchasing habits Construct the 80...
- Q A survey of 73 randomly selected homeowners finds that they spend a mean of 74 per month on home maintenance Construct a 95 confidence interval for the mean amount of...
- Q A research scientist wants to know how many times per hour a certain strand of bacteria reproduces He wants to construct the 99 confidence interval with a maximum error of...
- Q The mean amount of money spent on lunch per week for a sample of 75 students is 42 If the margin of error for the population mean with a 99...
- Q The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day They would like the estimate to...
- Q The mean GPA for 127 residents of the local apartment complex is 2 4 What is the best point estimate for the mean GPA for all residents of the local...
- Q A professor wants to estimate how many hours per week her students study A simple random sample of 65 students had a mean of 16 hours of studying per week...
- Q The mean per capita income is 23 037 dollars per annum with a variance of 149 769 What is the probability that the sample mean would be less than 23013...
- Q Intelligence Quotient IQ scores are often reported to be normally distributed with 100 0 and 15 0 A random sample of 35 people is taken Step 1 of 2 What...
- Q The quality control manager at a computer manufacturing company believes that the mean life of a computer is 88 months with a variance of 81 If he is correct what...
- Q Calculate the standard score z score of the given sample mean Round your answer to two decimal places 28 and G 8 n 67 3 27 Answer
- Q The mean per capita consumption of milk per year is 126 liters with a standard deviation of 24 liters If a sample of 100 people is randomly selected what is...
- Q A production manager at a wall clock company wants to test their new wall clocks The designer claims they have a mean life of 18 years with a standard deviation...
- Q The mean life of a television set is 123 months with a standard deviation of 19 months If a sample of 55 televisions is randomly selected what is the probability...
- Q Following are the ages of the winners of the men s Wimbledon tennis championship and the Masters golf championship for selected years Construct back to back split stem and leaf...
- Q The mean number of words per minute WPM typed by a speed typist is 79 with a variance of 225 What is the probability that the sample mean would be...
- Q The mean weight of an adult is 79 kilograms with a standard deviation of 10 kilograms if 188 adults are randomly selected what is the probability that the sample mean...
- Q Suppose that a study of elementary school students reports that the mean age at which children begin reading is 5 5 years with a standard deviation of 1 0 years...
- Q A study on the latest fad diet claimed that the amounts of weight lost by all people on this diet had a mean of 23 9 pounds and a standard...
- Q Find the standard deviation of the sampling distribution of sample means using the given information Round to one decimal place if necess W 42 and 0 n 25 Answer
- Q Find the mean of the sampling distribution of sample means using the given information Round to one decimal place if necessary 55 and o 10 n 4 Answer
- Q ide if the statement is True or False swer A sampling distribution of sample means has a mean equal to the population mean p False True
- Q a normal approximation be used for a sampling distribution of sample means from a population with 53 and 9 when n 64 wer O Yes because the mean is greater...
- Q The geyser Old Faithful in Yellowstone National Park alternates periods of eruption which typically last from 1 5 to 4 minutes with periods of dormancy which are considerably longer The...
- Q Given the building layout for Store A Store B Store C and Store D what portion of the share 7500 maintenance costs should be apportione to Store D A 2500ft...
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