In a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​ dates, and a sample of the results is listed below ​(1=not ​attractive; 10=extremely ​attractive). Construct a confidence interval using a 90​% confidence level. What do the results tell about the mean attractiveness ratings of the population of all adult​ females?   7​,

Q: In a sample of 16 fish from my pond it was found that 5 are under 165 grams in weight. Based on this…

A: Given  n=5 p= 5/16 = 0.312 1-p = 1-0.312 = 0.688 Standard error SE = p(1-p)/n

Q: 3. The mean and standard deviation of the scores of a random sample of 45 Grade 11 sludents who took…

A: Data for the question 2 is missing. I am solving 3 for you. 3. Given, n = 45 X¯ = 76S =…

Q: Is there a difference in the proportion of construction workers who are under 35 years of age and…

A:

Q: A stock market analyst notices that in a certain year, the price of IBM stock increased on 131 out…

A: It is given that the price of IBM stock increased on 131 out of 252 trading days.

Q: In a study of perception, 80 men are tested and 7 are found to have red/green ce blindness. (based…

A: The number of men tested (n) is 80 and number of men have red/green color blindness (x) is 7.

Q: The student government association at a university wants to estimate the percentage of the student…

A: It is given that margin of error (E) is 0.03 and the confidence level is 0.90.

Q: A random sample of 100 Colorado residents is selected, and it is found that 82% of them have Subaru.…

A:

Q: Having good relationships with coworkers is an important part of overall job satisfaction. A poll…

A: Given, The 95% confidence interval for the population proportion , p is (0.4872,0.5528)

Q: If a school district takes a random sample of 63 Math SAT scores and finds that the average is 488,…

A: Given information Sample size (n) = 63 Sample mean x̅ = 488 Population standard deviation σ = 100…

Q: A sample of 100 homes in city A and 100 homes in City B was taken to estimate the proportion of the…

A: Given that, A sample of 100 homes in city A and 100 homes in city B were taken to estimate the…

Q: A simple random sample of 300 branches out of a total of 1200 branches of a UK travel agency found…

A: Given : Here population is total branches of a UK travel agency  Population Size (N) = 1200 Sample…

Q: 5. A researcher surveyed of 300 young adults ages 18-29 found that on average, those surveyed sent…

A: 5. Given that, n=300x¯=67.7s=23.6 Confidence level=90% Significance level=1-0.90-0.10…

Q: Is there a difference in the proportion of construction workers who are under 35 years of age and…

A: Solution-: Given: n1=339,n2=297,x1=285,x2=197,α=0.10 We find 90% C,I, to estimate the difference in…

Q: If a school district takes a random sample of 53 Math SAT scores and finds that the average is 488,…

A: Given Information: Sample size n=53 Sample mean x¯=488 Population standard deviation σ=100

Q: From a random sample of 68 businesses, it is found that the mean time that employees spend on…

A: Given dataSample size(n) = 68Sample mean = 4.9 standard deviation = 0.35Significance level(α) =…

Q: When 38 campers are randomly selected and surveyed, it was found that the average number that prefer…

A: The summary of statistics is, x¯=24,σ=10.7,n=38 Critical values: By using the z-tables, the critical…

Q: In a survey of 2255 randomly selected US adults (age 18 or older), 1787 of them use the Internet…

A: We want to calculate the 90% confidence interval for each of the following proportions

Q: A study of 420,053 cell phone users found that 130 of them developed cancer of the brain or nervous…

A: Here we need find the 90% confidence interval.

Q: Independent random samples of 50 boys and 50 girls in a school were asked if they are depressed for…

A:

Q: In a sample of 225 registered voters of City Unknown, 63 of 100 males and 59 of 125 females support…

A: Given  X1=63, n1=100, X2=59, n2=125

Q: If a school district takes a random sample of 80 Math SAT scores and finds that the average is 497,…

A:

Q: If a school district takes a random sample of 89 Math SAT scores and finds that the average is 497,…

A: From the provided information, Sample size (n) = 89 Sample mean (x̅) = 497 Population standard…

Q: a simlpe random sample of 8 college freshmen were asked how many hours of sleep they typically got…

A: Box plot can be used to find the outlier. Box plot: Software procedure to draw box-whisker plot…

Q: What sample size is necessary such that a 95% confidence interval for the mean, using σ = 3, has a…

A: We have to find the necessary sample size such that a 95% confidence interval for the mean, using σ…

Q: 4. Out of sample of 500 people, 25% exercise daily. What is the confidence interval for the…

A: Given Information: Sample size n=500 Sample proportion p^=0.25 Confidence level = 95% = 0.95…

Q: In a random sample of 500 people aged 20-24, 20% were smokers. In a random sample of 450 people aged…

A:

Q: In a survey of 1007 parents of children ages 8 to 14, 75% say they are willing to get a second job…

A: Given information- A proportion of parents say they are willing to get a second job or part-time…

Q: If a school district takes a random sample of 89 Math SAT scores and finds that the average is 494,…

A:

Q: If a school district takes a random sample of 71 Math SAT scores and finds that the average is 460,…

A: Given : n = 71 Mean = 460 Standard deviation = 100 Confidence level = 99%

Q: 5, Randomly selected middle-aged people in both China and the United States were asked if they…

A: For China, n =1300 and x = 1170 therefore p^1 =11701300 = 0.9 For USA,  n = 150 and x =110 p^2…

Q: In a randomly selected group of 650 automobile deaths, 180 were alcohol-related. Construct a 95%…

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Q: The Nellie Mae organization conducts an extensive annual study of credit card usage by college…

A:

Q: If you construct a 90% confidence interval of the mean amount of money a student receives just from…

A: Given 90% confidence interval of the mean amount of money a student receives just from financial aid…

Q: Compute a 95% confidence interval for the difference between the proportion of students favoring…

A:

Q: A given poll states "54% of fifth graders read at or above the fifth-grade-level." If there is a…

A: According to the given information it is required to compute the 95% confidence interval for the…

Q: In a sample of 95 recommendations, it is found that 56% of them made money. Determine the upper…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…

Q: Would it be reasonable to develop a confidence interval from these data to show the mean number of…

A: John is interested to know the number of hours children under 12 years if age watched TV per day.…

Q: On the Stanford-Binet test, the mean IQ is 100. A class of 21 kindergarten pupils were tested with a…

A: Given  population mean μ=100, n=sample size=21, sample mean x̄=92, sample standard deviations s=6.92…

Q: 3. The Pew Internet and American Life Project conducted a poll between Oct 23 and Nov 19, 2006, in…

A: Given information X = 598, Sample size (n) = 935

Q: According to some car loan statistics, 44% of Americans are relying on an auto loan to pay for their…

A: Givenp^=0.44sample size(n)=1500confidence interval = 95%

Q: In a survey of 952 respondents, 620 of them voted in a recent election. Find a 95% confidence…

A: From the provided information, Number of respondents (n) = 952 Number of respondents who voted in a…

Q: If a school district takes a random sample of 61 Math SAT scores and finds that the average is 466,…

A: Find a 99% confidence interval for the mean math SAT score for this district.

Q: Do younger people use Twitter more often than older people? In a random sample of 316 adult Internet…

A:

Q: 8. Five hundred randomly selected adult residents in Pasig City were surveyed to determine whether…

A:

Q: 4. In a study of perception, 80 men are tested and 7 are found to have red/green color blindness.…

A:

Q: 3. The mean and standard deviation of the scores of a random sample of 45 Grade 11 students who took…

A: * SOLUTION :-  *(3)

Q: Suppose you have to construct a 98% confidence interval for a 10-sample study, what is the…

A:

Q: If a school district takes a random sample of 80 Math SAT scores and finds that the average is 442,…

A: Given that, Sample size n=80 Sample average x¯=442 Population standard deviation σ=100

Q: A 92% confidence interval for the mean number of cucumbers a plant produces per season was…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.