In a local university, 80% of the students live in the dormitories. A random sample of 64 students is selected for a particular study. The standard deviation of p-bar is   a. 64   b. 0.05   c. 1.6   d. 0.16   e. 0.5

Q: A college professor noted that the grades of his students in an introductory statistics class were…

A:

Q: A group of apples from a particular grower were found to have diameters with a mean of 67.0 mm and a…

A: Given data,Mean μ=67sd    σ=4.1

Q: The sale price of a certain model of grand piano across the country is approximately normally…

A: Given: Mean = 70000, Standard deviation =5400 Let Y defines the sale of certain model of grand…

Q: es data from before the roll out.  Each sales person when they closed a sale had an average contract…

A: The one-sample z-test is a statistical technique that used to define whether a sample of data could…

Q: Suppose that the cost of annual tuition at colleges is normally distributed, with an average annual…

A: Denote X as the cost of annual tuition at colleges. It is given that X is normally distributed, with…

Q: For a certain battery company, the life span of the batteries follows a normal distribution. What…

A: Here's, mean is 35.4 hours and standard deviation is 90 minutes or 1.5 hour. We will use z-standard…

Q: The average height for female golden retrievers is 21.96 inches with a standard deviation of 1.77…

A: Given,mean(μ)=21.96standard deviation(σ)=1.77

Q: Three hundred college freshmen's grade point averages are seen to be nearly regularly distributed,…

A:

Q: The systolic blood pressure of 18-year-old women is a roughly bell-shaped distribution with a mean…

A: We have given that.   X~N( μ , ?^2 )   μ =120 , ? =12   Z-score =( x - μ )/?

Q: The length of a fully grown hibiscus plant is normally distributed and has a mean 35cm. It is found…

A: Normal Distribution: A continuous random variable X is said to follow Normal distribution with…

Q: A study has shown that 15% of all college textbooks have a price of $178.52 or higher.  It is known…

A: From the provided information Standard deviation (σ) = $32.55 Let X be a random variable which…

Q: The systolic blood pressure for a healthy person is normally distributed with a mean of 120 and a…

A: Correct Answer is  (d) 118.95

Q: n variable.

A:

Q: a population has a mean of 74 and a standard deviation of 17.4. a sample of 35 items is randomly…

A:

Q: The average number of acres burned by forest and range fires in a large New Mexico county is 4,300…

A: GivenMean(μ)=4300standard deviation(σ)=750

Q: A group of apples from a particular grower were found to have diameters with a mean of 69.0 mm and a…

A:

Q: A certain video game has 72% chance of sucess. During summer vacation a person plays 12 games a day.…

A: In question, Given that A certain video game has 72% chance of sucess. During summer vacation a…

Q: A study by the National Center for Health Statistics suggested that women between the ages 20 and 29…

A: The objective of this question is to find the proportion of women between the ages of 20 and 29 in…

Q: In the question below, do 50 minutes imply the mean of the population or the mean of the sample?…

A: The derived numerical characteristic that explains the average (or mean) at the population level can…

Q: Suppose that another sample of resting heart rates for five Math students was obtained: 72, 68, 66,…

A: From the given data we want to know the data value .

Q: In a random sample of 50 adults, the mean body mass index (BMI) was 27.7 and the standard deviation…

A:

Q: population has a mean of 91 and a standard deviation of 10. A sample of 25 observations will be…

A: μ = 91σ = 10n = 25P(87.56<x¯<96.3) = ?

Q: A runner for team 1 can run a race in 54.6 seconds. Team 1 has running times with a mean of 52.1…

A: given data team 1 x1=54.6μ1=52.1σ1=2.09team 2x2=53.7μ2=51.2σ2=3.53we have to find z score  and and…

Q: An electrical firm manufactures light bulbs for LCD projectors. A randomly selected sample of 24…

A: Given that  Ransom sample size (n) = 24 Mean life span (x¯) = 600 hours Standard deviation (s) = 50…

Q: The salary for workers at a company are normally distributed with a mean of $60,000 and a standard…

A:

Q: The average sale price (online) for a certain brand of professional mountain bike is approximately…

A: Given that, Population Mean (μ)=$4200Population standard deviation (σ)=$250 Let X denote the average…

Q: Seventy million pounds of trout are grown in the U.S. every year. Farm-raised trout contain an…

A: Given Mean =32 Standard deviation=7.5

Q: In a survey of a group of​ men, the heights in the​ 20-29 age group were normally​ distributed, with…

A:

Q: Find the probability that the mean of a randomly chosen sample of 25 students scores is between 72.3…

A:

Q: The heights of strawberry plants are Normally distributed with a mean of 12 inches and a standard…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: population, it was found that the diastolic blood pressure is normally distributed with a mean 81.5…

A:

Q: In a survey of a group of​ men, the heights in the​ 20-29 age group were normally​ distributed, with…

A:

Q: The annual ground coffee expenditures for households are approximately normally distributed with a…

A: Given Information: Population Mean = $46.34 Standard deviation = $10.00 (a) To find the probability…

Q: The length of a fully grown nibiscus plants is normally distributed and has a mean of 35cm. It is…

A: It is given that mean is 35.

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.