2. Assume that the prices paid for housing within a neighborhood have a normal distribution, with mean $100,000, and standard deviation of $35,000. (a) What percentage of houses in the neighborhood have prices between $90,000 and $130,000? (b) What price of housing is such that ônly 12% of all houses in the neighborhood have lower prices?

Q: 3. The weight of a regular bag of new powdered milk are normally distributed with mean 500 grams and…

A: We have given that.   X~N( μ , ?^2 )   μ =500, ? =?   Z-score =( x - μ )/?

Q: Suppose that the annual rainfall in Ferndale, California, is known to be normally distributed, with…

A: Given, Mean, μ = 35.5 Standard deviation, σ = 2.5 We have to find the probability that the rainfall…

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: 7.) Assume that the speed of automobiles on an expressway during rush hour is normally distributed…

A:

Q: Assuming that the scores of Grade 11 students in Statistics and Probability in their third quarter…

A:

Q: 1. The owner of Britten's Egg Farm wants to estimate the mean number of eggs laid per chicken. A…

A:

Q: 2) The annual salaries of employees in a large company are approximately normally distributed with a…

A: Obtain the percent of people earn less than $40,000. The percent of people earn less than $40,000 is…

Q: Among social work students, the variable "number of textbooks purchased during the academic year"…

A: The Normal distribution is also called as the Gaussian distribution. It is the most common…

Q: Suppose that wedding costs in the Caribbean are normally distributed with a mean of $6500 and a…

A: Given: μ=6500σ=840 As per empirical rule, 68% of data lie within 1 standard deviation of the mean…

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A:

Q: 1. The time spent in freefall in when skydiving is normally distributed with a mean of 20 seconds…

A:

Q: Suppose that wedding costs in the Caribbean are normally distributed with a mean of $8000 and a…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Suppose that the distribution of income in a certain tax bracket is approximately normal with a mean…

A: Probability distribution: A probability distribution function is the statistical function that…

Q: A company carries out copier maintenance repairs. According to the records, a service time average…

A: Given, Mean, mu= 75 Standard deviation, sigma= 20 We know z score=(X-mu)/sigma

Q: 4. Distribution of heights of elderly English women is known to be normal with a mean height of 160…

A: As per Bartleby guideline expert have to answer first question three subpart only dear student…

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 71…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: 2. The mean height of the grade nine students at a certain high school is 164 centimeters and the…

A: The random variable height follows normal distribution. We have to find the probability of the…

Q: Suppose that the duration of a particular type of criminal trial is known to be normally distributed…

A: Given that, If X is normally distributed, X~N(21,7) Mean,mu = 21, Standard deviation, sigma=7 X =…

Q: 2. Assume that, among residents of a large (over 6,000) Florida subdivision, the population mean age…

A: From the given information, The mean age is 65 and standard deviation is 2 years.

Q: Assume that the heights of men applying for Us Military training are normally distributed with a…

A: Given, Assume that the heights of men applying for Us Military training are normally distributed…

Q: Suppose that 100,000 recent grads have starting salaries which are normally distributed with a mean…

A: Given that  μ=120,000σ=20,000 b) Consider the probability that the salary above $131,200 is,…

Q: 3. The amount dispensed by the coffee machine follow the normal distribution with a mean of 5,286…

A:

Q: Suppose the talk time on a certain cell phone battery is approximately normally distributed with a…

A:

Q: 24. Suppose annual salaries for sales associates at Target have a mean of $32,500 and a standard…

A: According to the provided information, Mean (μ) =$32500 Standard Deviation (σ) = $2500

Q: 25. Assume that the hourly cost to operate a commercial airplane follows the normal distribution…

A: The random variable hourly cost follows normal distribution. The population mean is 2100. The…

Q: In an article in the Journal of Management, Joseph Martocchio studied and estimated the costs of…

A: If the sample size (n) is large (greater than or equal to 30), then the sample mean follows normal…

Q: Assume that the hourly cost to operate a commercial airplane follows the normal distribution with a…

A: Consider X be a random variable which follows normal distribution indicates the operating cost of a…

Q: Suppose a paint manufacturer has a daily production, x, that is normally distributed with a mean of…

A:

Q: 4. Assume that the test scores from a college admission test are normally distributed with a mean of…

A: Given  μ= Mean of test score from a college admission test = 450 σ= Standard deviation of test score…

Q: Suppose the durations of human pregnancies follow a mound-shaped distribution with a mean of 266…

A:

Q: If the weekly grocery expenditure of households in a certain urban market is known to be normally…

A:

Q: 4. The price of a new condominium unit in Bonifacio Global City is normally distributed with a mean…

A: As per the requirement solution of 4th question Given: μ=8500000σ=920000 Middle 90% of this market.

Q: Suppose the distribution of typing speeds in words per minute for experienced typists can be…

A:

Q: Assume that a nomral distribution has a mean of 22 and a standard deviation of 7. What percentage of…

A:

Q: 2. A scrap metal dealer claims that the mean of his cash sales is "no more than $80," but an…

A: Given that: Population mean(u) = $ 80 Sample mean = $ 91 SAMPLE standard deviation = $21 Sample size…

Q: 4. Find the 60th percentile for the weight of 10-year-old girls given that the weight is normally…

A:

Q: Suppose that the annual household income in a small Midwestern community is normally distributed…

A: Solution: Let X be the annual household income in a small Midwestern community is normally…

Q: Suppose that water usages in American showers are normally distributed, with an average shower using…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 16.4 and…

Q: 5. The quality control manager at a light bulb factory needs to estimate the mean life of a large…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Suppose Stock A has had a mean price of $6.58 per share with a standard deviation of $1.88, and…

A: GivenFor stock A:-Mean(μ)=6.58standard deviation(σ)=1.88For Stock B:-Mean(μ)=10.57standard…

Q: A firm’s marketing manager believes that total sales for next year will follow the normal…

A: Given information- Population mean, µ = $3200,000 Population standard deviation, σ = $250,000 We…

Q: Suppose the durations of human pregnancies follow a mound-shaped distribution with a mean of 266…

A:

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 65…

A: Given information- Mean, μ = 65 Standard deviation, σ = 4 a) The percentage of scores that were…

Q: # 6- A set of data items is normally distributed with a mean of 90 and a standard deviation of 5.…

A:

Q: A researcher reports that the average income of system analysts in Makati is P44,000 per month. A…

A: Given: Average(μ)=44000sample size(n)=30Sample mean(x¯)=45800Standard deviaion(s)=5400

Q: 3. The annual per capita consumption of ice cream (in pounds) in the Philippines can be approximated…

A:

Q: Suppose that the average height of men in the United States is approximately normally distributed…

A: From the provided information, Mean (µ) = 70 Standard deviation (σ) = 4 X~N (70, 4) Here X be a…

Q: 4. A normally distributed set of 1,010 values has a mean of 103 and a standard deviation of 12.…

A:

Q: Interpret the ­z-score of 1.45 in terms of its relationship to standard deviation as well as the…

A: Solution: From the given information, z=1.45.

Q: Suppose that the amount of time that takes place for the Bureau of Internal Revenue to send refunds…

A: Solution: 4. Let X be the amount of time. From the given information, X follows normal distribution…

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.