Statistics question and answers for December 25, 2023
- Q 4 A local news agency conducted a survey about unemployment by randomly dialing phone numbers until it had gathered responses from 1000 adults in its state In the survey 19...
- Q Suppose Abby tracks her travel time to work for 60 days and determines that her mean travel time in minutes is 35 6 Assume the travel times are normally distributed...
- Q Use the given data to find the 95 confidence interval estimate of the population mean Assume that the population has a normal distribution IQ scores of professional athletes Sample size...
- Q The following random sample was selected from a normal distribution 10 13 14 8 8 9 14 4 12 6 a Construct a 90 confidence interval for the population mean...
- Q For a given binomial distribution use normalization to approximate the binomial 7 6 a Use the normal approximation of the binomial distribution to approximate the probability of rolling exactly 10...
- Q A random sample of 11 size AA batteries for toys yield a mean of 3 75 hours with standard deviation 1 24 hours a Find the critical value t for...
- Q A poll is taken in which 334 out of 575 randomly selected voters indicated their preference for a certain candidate a Find a 98 confidence interval for p P 0...
- Q A random sample of 1700 home owners in a particular city found 459 home owners who had a swimming pool in their backyard Find a 95 confidence interval for the...
- Q Based on a random sample of 50 a 95 confidence interval for the population proportion was computed Holding everything else constant which of the following will reduce the length of...
- Q Assume that population proportion is to be estimated from the sample described Use the sample results to approximate the margin of error and 95 confidence interval Sample size n 535...
- Q To find margin of error for confidence interval with sample means o unknown on Excel CONFIDENCE T alpha standard deviation sample size Example 3 Wildlife conservationists studying grizzly bears in...
- Q The scores of students on an exam are normally distributed with a mean of 298 and a standard deviation of 72 a What is the first quartile score for this...
- Q study on the length of time a person brushes their teeth is conducted on a large population of adults The mean brushing time is and the standard deviation is o...
- Q Example 2 Listed below are the number of years it took for a random sample of college students to earn bachelor s degrees Construct a 95 confidence interval estimate of...
- Q 84 Consider purchasing a system of audio components con sisting of a receiver a pair of speakers and a CD player Let A be the event that the receiver functions...
- Q 5 The offices of president vice president secretary and treasurer for an environmental club will be filled from a pool of 19 candidates Eight of the candidates are members of...
- Q A golf course architect has four linden trees three white birch trees and three bald cypress trees to plant in a row along a fairway In how many ways can...
- Q Paper size Print 2 A golf course architect has four linden trees three white birch trees and three bald cypress trees to plant in a row along a fairway In...
- Q A DJ is preparing a playlist of 24 songs How many different ways can the DJ arrange the first six songs the playlist There are different ways that the DJ...
- Q Question 7 6f 15 7 Suppose X is a binomial random variable with 8 trials and success probability 0 30 Find P X 3 Round your answer to the nearest...
- Q 6 Using the following information answer the following Generally the population scores on an IQ test are normally distributed with a mean of 100 and a standard deviation of 15...
- Q 1 Calculating Z Scores Calculate the z score for each of the following raw scores using the following information A set of data is normally distributed with a mean equal...
- Q 5 Find the probability of obtaining a score at or below the following z scores a 0 08
- Q In a large class of introductory Statistics students the professor has each person toss a coin 20 times and calculate the proportion of their tosses that were heads Complete parts...
- Q Hint Questions 4 and 5 You don t have to do the z score transformation since you already have a z score 4 Find the probability of obtaining a score...
- Q 1 2 3 4 5 SUM 1 2 5 8 10 11 17 21 23 25 000000
- Q 1 2 3 4 5 SUM 3 1 2 4 5 5 23 23 22 20 12 t The correlation coefficient is round to three decimal places r Find the...
- Q 7 The disease status and exposure of a small population is summarized in the given table below An individual is randomly selected from this population Define A to be the...
- Q In a large class of introductory Statistics students the professor has each person toss a coin 20 times and calculate the proportion of their tosses that were heads Complete parts...
- Q Points 0 of 1 Sa In a poll taken in December 2012 Gallup asked 1006 national adults whether they were baseball fans 47 6 said they were Almost five years...
- Q For each situation described below identify the population and the sample explain what p and p represent and tell whether it is appropriate to create a one proportion z interval...
- Q Assume that the duration of human pregnancies can be described by a Normal model with mean 266 days and standard deviation 13 days a What percentage of pregnancies should last...
- Q It is assumed that the duration of human pregnancies can be described by a Normal model with mean 266 days and standard deviation 16 days The results shown in the...
- Q For each situation described below identify the population and the sample explain what p and p represent and tell whether it is appropriate to create a one proportion z interval...
- Q It is assumed that the duration of human pregnancies can be described by a Normal model with mean 266 days and standard deviation 16 days The results shown in the...
- Q For each situation described below identify the population and the sample explain what p and p represent and tell whether it is appropriate to create a one proportion z interval...
- Q For each situation described below identify the population and the sample explain what p and p represent and tell whether it is appropriate to create a one proportion z interval...
- Q 8 State the z scores that most closely approximates the following probabilities hint similar to question 7 but you have to first convert the percentage into a decimal Similar to...
- Q For each situation described below identify the population and the sample explain what p and p represent and tell whether it is appropriate to create a one proportion z interval...
- Q Complete the statement below As the sample size increases the mean of the sampling distribution stays the same gets larger gets smaller
- Q The owner of Cruz Wedding Photography believes that the average number of wedding bookings per year can be estimated by a triangular distribution with a minimum of 10 maximum of...
- Q For each situation described below identify the population and the sample explain what p and p represent and tell whether it is appropriate to create a one proportion z interval...
- Q The Paralyzed Veterans of America is a philanthropic organization that relies on contributions They send free mailing labels and greeting cards to potential donors on their list and ask for...
- Q U of The environmental group Oceana analyzed 1215 samples of seafood purchased across the United States and genetically compared the pieces to standard gene fragments that can identify the speci...
- Q According to MarylandMatters org 77 of Marylanders are fully vaccinated for COVID 19 A college administrator in Maryland wants to test if a higher percentage of students at their institution...
- Q Calculate each probability question below Each answer will require the use of the Z table provided in Canvas Be sure to show all your work for each question Also to...
- Q A factory is considering replacing some older machines They decided that if the proportion of defective items the machine produces is significantly more than 3 it will be replaced A...
- Q 1 Calculating Z Scores Calculate the z score for each of the following raw scores using the following information A set of data is normally distributed with a mean equal...
- Q 3 Assuming each outcome is equally likely in the sample space find P AUB A COB Answer Previous Answer 8
- Q According to Maryland Matters org 77 of Marylanders are fully vaccinated for COVID 19 A college administrator in Maryland wants to test if a higher percentage of students at their...
- Q The Centers for Disease Control estimates indicate 20 percent of the U S population had a sexually transmitted infection STI on any given day in 2018 A public health researcher...
- Q You re an accounting manager A year end audit showed 7 of transactions had errors You implement new procedures Two hundred of the most recent transactions were selected and 11...
- Q A factory is considering replacing some older machines They decided that if the proportion of defective items the machine produces is significantly more than 3 it will be replaced A...
- Q Question 1 of 7 1 How many outcomes are in the event B Answer B Previous Answer 04
- Q The age when smokers first start from previous studies is normally distributed with a mean of 13 years old with a population standard deviation of 2 1 years old A...
- Q Duke s Brand Dog Treats claim to contain 186 treats in each of its jumbo packages of treats The standard deviation for the number of treats in each package is...
- Q You have a distribution with the following characteristics X 127 s 29 What is the probability of finding a score in between 100 146 Write your answer below as a...
- Q You have a distribution with the following characteristics X 70 s 22 What is the z score of 84 Write your answer below to two decimal places
- Q structions The following is the recorded arthquakes on South Carolina from August 2016 O February 2017 Use the data to find the esiduals Then draw a residual plot by hand...
- Q 45 How valium works Valium is a common sant and sedative A study investigated how valium works by comparing its effect on sleep in seven geneti cally modified mice and...
- Q What is the probability of finding a score lower than a z score of 1 81 Write your answer below as a percentage to two decimal places do not include...
- Q 31 Sensitive questions The 2013 Youth Risk Behavior Survey found that 349 individuals in its random sample of 1367 Ohio high school students said that they had texted or emailed...
- Q 8 13 Number Skills of Eighth Graders Suppose that scores on the mathemat ics part of the National Assessment of Educational Progress NAEP test for eighth grade students follow a...
- Q 33 An outlier strikes You have data on an SRS of freshmen from your college that shows how long each student spends studying and working on homework The data contain...
- Q 3 29 Attractive instructors A psychologist claims that stu dents are more attentive in classes taught by instruc tors rated as attractive by students than in classes with instructors rated...
- Q 7 Do You Drink Pop A July 2015 Gallup poll asked a national sample of 1009 adults aged 18 and over if they actively avoided drinking soda or pop Of...
- Q 1 Rate This Product An online shopping site asks customers to rate the products they buy on a scale from 1 strongly dislike to 5 strongly like The invitation to...
- Q 3 Sampling Students A college administrator questions the first 50 stu dents he meets on campus the day after final exams are over He asks them whether they had positive...
- Q 4 14 pts The life expectancy of a microwave oven is normally distributed with an average of 16 7 years and a standard deviation of 3 1 years Round all...
- Q 4 14 pts The life expectancy of a microwave oven is normally distributed with an average of 16 7 and a standard deviation of 3 1 years Round all probabilities...
- Q A random sample of n 10 regions in New England gave the following violent crime rates per million population x New England Crime Rate 3 3 3 7 4 2...
- Q eye gre 4ster Does eye grease work In one study 16 student subjects took a test of sensitivity to contrast after three hours fac ing into bright sun both with...
- Q 35 5 versus 1 Sketch the standard Normal curve for the z test statistic and mark off areas under the curve to show why a value of z that is...
- Q 7 31 Is this what P means A randomized comparative experiment examined the effect of the attractiveness of an instructor on the performance of students on a quiz given by...
- Q 7 17 Significance from a Table A test of Ho 0 against Ha 0 has test statistic g 1 65 Is this test statistically significant at the 5 level a...
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