Based on surveys of random samples from people in a town, the proportion of people interested in a new chain restaurant opening in their town is 0.42 with a standard deviation of 0.07. Which of these intervals is the smallest that likely contains 95% of the sample proportions? 0.21 to 0.63 O 0.28 to 0.56 O 0.35 to 0.49 O 0.41 to 0.43

Q: The head circumferences of women are normally distributed with a mean of 32 cm and a standard…

A: We have given that.   X~N( μ , ?^2 )   μ =32 , ? =9   , n= 16   Z-score =( x - μ )/?   Note…

Q: An officer of a certain agency claims that the mean monthly income of a family that lives in a…

A: The random variable monthly income of a family follows normal distribution. We have to write the…

Q: The distribution of scores on a standardized aptitude test is approximately normal with a mean of…

A:

Q: A random sample of 197 12th-grade students from across the United States was surveyed, and it was…

A: Given, Sample size n=197 Average time spent on the computer per week=x=23.5 hours Standard deviation…

Q: Assuming that the scores of the student in a test are normally distributed with the mean of 40 and…

A: We have given that  Mean(µ) = 40Standard deviations (σ) = 6X ~ N (µ, σ )= N(40, 6)

Q: "Ch6. Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Solution: Let X be the transport time. From the given information, X has mean µ=31 minutes and a…

Q: Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Solution: Let X be the transport time. From the given information, X has mean µ=28 minutes and a…

Q: A population has a standard deviation of 18. On average, how much differece should exist for a…

A:

Q: Customers at a certain pharmacyspend an average of $54.40, with a standard deviation of $13.50.…

A: It is given that customers at a certain pharmacy spend an average of 54.40, with a standard…

Q: The IQs of 300 applicants to a certain college are approximately normally distributed with a Mean of…

A: The mean and standard deviation are given by μ=115,σ=12 The probability of getting a score more…

Q: population with a standard deviation of 20, how large a sample is necessary to have a standard error

A: Given that  Population with standard deviation (σ) = 20   We know that  Standard error (SE) = σn…

Q: In a two - tailed test, given that the population mean is 40 with a standard deviation of 2.5. A…

A:

Q: ​Recently, a random sample of 25–34 year olds was​ asked, "How much do you currently have in​…

A: The table shows the responses to the survey.

Q: The standard deviation of the population of IQ Scores is standardized to be 15 points. Calculate the…

A: (a) Obtain the standard error of the mean for the sample of size of 81. The standard error of the…

Q: Given a distribution that has a mean of 37 and a standard deviation of 12, calculate the probability…

A:

Q: The tip percentage at a restaurant has a mean value of 18% and a standard deviation of 6%. What is…

A: Given Information: Mean: μ=18Standard deviation: σ=6 The sample size is n=15.

Q: The IQ scores of adults are normally distributed with a mean of 100 and a standard deviation of 15.…

A: Consider X be a random variable which follows normal distribution indicating the IQ scores of…

Q: A person must score in the upper 2% of the population on an IQ test to qualify for membership in…

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: Given a sample with a mean of 57 and a standard deviation of 14, find x such that Pr(X > x) = 0.184.…

A: It is given that the mean 57 and standard deviation 14. That is, µ= 57, σ = 14. Thus, X~ N (57, 14).…

Q: A researcher reports survey results by stating that the standard error of the mean is 20.The…

A:

Q: A population is normally distributed with a mean of 50 and a standard deviation of 10. Find the…

A: Given data,Mean μ=50sd    σ=10P(X<44)=?

Q: Suppose that the mean cranial capacity for men is 1070 cc (cubic centimeters) and that the standard…

A: We need to complete the given statements assuming that men's cranial capacities are normally…

Q: In a certain province, the set of recorded midday temperature readings for the month of April is…

A: Given that 10.03% of recorded temperature readings were under 32.32 °C, and that 33% were above…

Q: A random sample of 75 eighth grade students scores on a national mathematics assessment  test has a…

A: Population mean (µ) = 270Standard deviations (σ) = 30Sample size (n) = 75Sample mean (x̅) =…

Q: 4) According to one pollster, 59 % of people are afraid of flying. Suppose that a sample of size 26…

A:

Q: A researcher was testing the number of pop corn kernels that popped out of a mini bag of 100 k after…

A: Let, X=the number of kernels popped. X has mean=72 and standard deviation=12

Q: A normal distribution has a mean of u standard deviation of o = 12. For each of the follow- ing…

A: Given info: Here, mean, µ = 30 and σ = 12

Q: The amount of rain falling in Waimea Canyon State Park, Kauai is normally distributed with a mean of…

A:

Q: The SAT Math scores have a bell-shaped distribution with a Mean of 567 and a Standard Deviation of…

A: We have given that,  Let the SAT scores are normally distributed with mean (mu) = 567 and standard…

Q: In a plant nursery, the owner thinks that the lengths of seedlings in a box sprayed with a new kind…

A: We will conduct a two-tailed test. It is because the estimated mean height of seedlings can depart…

Q: "Ch6. Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: The 2019 General Social Survey asked a number of teenagers from different countries how much time…

A: To check if there is a larger variety of TV watching times for teenagers in the United States is…

Q: The mean output of hamburger patty of the Southern Valley Meat Corporation is 120,000 pounds daily,…

A: Given,mean(μ)=120,000standard deviation(σ)=40,000

Q: The monthly In distributed, with mean of $100 standard deviation of $13. Find the probability that a…

A:

Q: (a)    It has been reported that the length of human pregnancies from conception to birth…

A: a)GivenMean(μ)=266standard deviation(σ)=16

Q: Ten years after graduation, the salaries of Heriot-Watt University graduates are Normally…

A: Given that.   X~N( μ , ?^2 )   μ=55000    , ?=11000   Z-score =( x - μ )/?

Q: The number of pages produced by a fax machine in a busy office is normally distributed with a mean…

A: Normal distribution

Q: MCAT scores are normally distributed with a mean of ? ​​= 501.5 and a standard deviation of ? =…

A: Given: Population mean μ = 501.5 Population standard deviation σ = 10.7 Formula Used: Z-score = X-μσ

Q: A survey of 1000 women ages 20 to 30 found that their heights were normally distributed, with a mean…

A: (a) From the given information The mean is 65 in. and a standard deviation is 2.5 in. The mean x¯ of…

Q: The sample mean and sample standard deviation of all San Francisco student scores on the most recent…

A:

Q: In the past Algebra classes, records show that the average score of the students in mid-term exam…

A:

Q: A statistical analysis of a very large sample of fully-assembled medical devices indicates that the…

A:

Q: Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15.…

A: Since the area corresponding to z-value 1.73205 is 0.958368 calculated by Excel command NORM.S.DIST…

Q: The IQ scores of a large group of students are approximately normally distributed with a mean of 100…

A:

Q: The Weschler Intelligence Scale (IQ) for Children is approximately normally distributed with a mean…

A: Thanks for giving opportunity to serve for bartleby students,   Hey, There ! Thank you for posting…

Q: A recent study showed that the average number of sticks of gum a person chews in a week is 14. A…

A: Givensample size(n)=25Mean(x)=17standard deviation(s)=3.1α=0.10

Q: The results from a statistics class’ first test are as follows: The average grade obtained on the…

A: A normal distribution is also called bell shaped curve which is symmetric about the mean. The…

Q: 1. In a medical examination, 300 people undergo a height measurement and was found out that the…

A: Given Information: 300 people undergo a height measurement and was found out that the average height…

Q: 1.) It is claimed that the average performance of newly graduated nurses from the recent board exam…

A: Since you have asked multiple question, we will solve the first question for you. If youwant any…