8.2 What do you know about science? A Pew Internet poll tested 4464 U.S. adults about their knowledge of science. One of the questions asked how far a car will travel in 45 minutes if it travels at a constant speed of 40 miles per hour. Possible answers presented were

Q: A college counselor wants to determine if the number of hours spent studying for a test can be used…

A: An explanatory variable is the one which can be changed independently or what you manipulate or…

Q: A medical researcher conjectures that smoking can result in the wrinkled skin around the eyes. The…

A: Given: The data is provided for the Smokers and Nonsmokers. Let x represents the Smokers. Let y…

Q: A survey item administered at the end of a training program asked participants their opinion about…

A: The row and column totals for the given contingency table is, The degree of freedom is,

Q: A medical researcher conjectures that smoking can result in the wrinkled skin around the eyes. The…

A: Given, Let X be the smoker and Y be the non-smoker Smoker Non-smoker 10 4 8 2 7 5 9 1 5…

Q: a servery of 1200 adults and children in the unittest states has shown that more people have lost a…

A: Population interest :  people have lost a close connection with nature

Q: Out of a sample of 38 people, 23 people enjoyed biking and 15 enjoyed running. Test the claim that…

A: Given that,  x = 23, n = 38 The sample proportion of people prefer biking is, Null and alternative…

Q: A random sample of 1019 adults in a certain large country was asked​ "Do you pretty much think…

A: Givensample size(n)=1019no.of adults indicated that televisions are luxury(x)=518

Q: A study was conducted to determine if a person's resting heartbeat (how many beats per minute) was…

A: The observed data is   Exercises Regularly Does not Exercises Regularly Total Above 70 BPM 18…

Q: 14. Astronauts increased in height by an average of approximately 40 mm (about an inch and a half)…

A: Confidence Interval: It is a range of values in which the required measures can be in with some…

Q: According to a newspaper study of more than 1 million medical dispatches from 2007 to 2012, the 911…

A:

Q: What percentage of the variation in  can be explained by the corresponding variations in  and  taken…

A: X1 is the dependent variable  X2 and X3 are the independent variables.

Q: Suppose that Mark, a subject in this study, has a Percent Body Fat of 17.4 and a weight of 224.5…

A: The leverage of an observation is based on how much the observation's value on the predictor…

Q: I dont have an example forthe problem question 22, so I am having trouble. Please help.

A: Introduction:Suppose a random variable X has mean μ and standard deviation σ.Let X = x be the cutoff…

Q: Regardless of age, about 20% of American adults participate in fitness activities at least twice a…

A: Solution: Let X be number of people indicated that they participated in a fitness activity at least…

Q: A child dying from an accidental poisoning is a terrible incident. Is it more likely that a male…

A: Given: A child dying from an accidental poisoning.  It is showed that out of 1830 children between…

Q: A survey was done of men's and women's hands to see if the ring finger appeared longer than the…

A: Given,            Men       Women        Total       Yes     28        29         57…

Q: A tire manufacturer tested the braking performance of one of its new tire models on a test track.…

A: The parametric test are used when the population follows a normal distribution. If the population is…

Q: What is the value of SS Between?

A: The data shows the ratings of five different engineering board examinations.

Q: Consider a survey in which 1000 people are asked “How often do you go to the dentist?”  The variable…

A: Given: Number of people that have been involved in the study = 1000

Q: The relative risk of developing lung cancer among individuals who smoke is 15.0. Which of the…

A: Relative risk is the ratio of probability of an outcome in an exposed group to the probability of an…

Q: Consider that a researcher is attempting to reduce the expected distance between M and µ as much as…

A: The size of the sample plays a very important role when it comes to sampling distribution. Big…

Q: Strack, martin and Stepper (1988) reported that people rate cartoons as funnier when holding a pen…

A: The objective of this test is to find whether the cartoons are rated significantly funnier when the…

Q: We have data on the lean body mass and resting metabolic rate for 12 women who are subjects in a…

A:

Q: The number of sick days taken (per month) by factory workers is summarized below. Number of Days…

A: The frequency distribution table for the number of sick days of workers are given below: Number…

Q: Which term describes BD?

A: Given:  To find the line segment BD describes which term in the given option.

Q: When asked, "How much time will you require to complete this task?"cognitive theory posits that…

A: Given: A group of students are being surveyed about the estimated time to read a certain number of…

Q: In an attempt to reduce the growth of its population, China instituted a policy limiting a family to…

A:

Q: According to health statistics taken to observe obesity in men 6 feet or taller: A = 250 pounds is…

A: Note: Thank you for the question. Since multiple questions are posted, we are answering the first…

Q: Is the given statement true or false? Justify your answer. If a police officer wants to find…

A: Claim Average speed of Motorists is 55 MPH Hypothesis Null Hypothesis: Ho: µ = 55 MPH Alternative…

Q: Is IQ related to GPA?If a student’s IQ is 117, what GPA would you predict?How much of the variation…

A: Given Info :  The provided data are from a random sample of thirty cases from a study by Howell…

Q: A cognitive psychologist working in the area of suggestion asked a sample of children to solve as…

A: According to our answering guidelines, we can answer only first three subparts of a question and the…

Q: Regardless of age, about 20% of American adults participate in fitness activities at least twice a…

A: The provided information is  n=100x=15α=0.05The proportion is p^=xn=15100=0.15a.The null and…

Q: Because of safety considerations, in May 2003 the Federal Aviation Administration (FAA) changed its…

A: a) The 95% confidence interval for the population mean summer weight of Airline passenger is given…

Q: In a study with lower quartile 100, upper quartile 140 and median as 130 How many people can have…

A:

Q: It has been suggusted that the highest priority of retirees is travel. Thus, a study was conducted…

A: a)   It is needed to check, whether there is difference in the length of stay for pre and post…

Q: An automobile manufacturing company wanted to investigate how the price of one of it's car models…

A: Solution: 1. The regression equation is obtained by using excel. Procedure: Enter the data in…

Q: A dietician read in a survey that 70.5% of adults in the U.S. do not eat breakfast at least 3 days a…

A: It is need to be tested whether the population proportion of adults in U.S who do not eat breakfast…

Q: Researchers conducted a study to estimate the relationship between a subject's brain activity while…

A: Solution:  To test the claim that long commercials recall is more than short one,  Null hypothesis:…

Q: In an attempt to measure the effects of acid rain, researchers measured the pH (7 is neutral and…

A: Quartiles and median: Q1=4.335, from the excel function, =QUARTILE(E2:E41,1) Q3=5.1125, from the…

Q: If the data is IQ test scores, an individual with a negative z-score what IQ level would he have? 2

A: Here the z-score is negative. So individual will have low IQ.

Q: You have been tracking how much you spend on gas every month for several months and found that on…

A: The interquartile range is the difference between the third quartile and the first quartile and it…

Q: The speeds (in mi/h) of the cars passing a certain checkpoint are measured by radar. The results are…

A: Mode is the data that repeated most

Q: then the tutay nimberof Poplationchang. d) People sometimes claim' skydiving is less dangerous than…

A: In the given data we have only the counts of people who died with those reasons. But we require how…

Q: A study conducted to see if teenagers drive at faster average speeds than the general population of…

A: Given: μ0=45 mph

Q: The vapor pressure of 1-chlorotetradecane at several temperatures are tabulated below. T (ºC)…

A: Given   The vapor pressure of 1-chlorotetradecane at several temperatures are tabulated below.…

Q: Do bathroom scales tend to underestimate a person's true weight? A 150 lb test weight was placed on…

A: The test hypotheses are given below: Null hypothesis:H0:p≤0.50 Alternative hypothesis:H1:p>0.50

Q: In a random sample of 765 adults in the United States, 122 of them said if they had to cover a $400…

A: a. The set or collection of all possible observations is defined as the population.

Q: The results of a recent study show that the proportion of people in the western United States who…

A: There are two hypothesis 1 null hypothesis H0 in which we support that the given claim is correct 2…

Q: A poll summarized the results of a survey of 2,400 adults and 500 teens aged 13 to 17. It was…

A: Confidence interval explains the range where the true parameter lies. It is calculated by the…

Q: A random sample of 1011 adults in a certain large country was asked​ "Do you pretty much think…

A: The known values are, x=514,n=1011 The formula for calculating the point estimate for the population…