identify (but don't collect) a type of dataset that might be normally distributed, and then answer...

identify (but don't collect) a type of dataset that might be normally distributed, and then answer the following questions:

What is brief description of the data?
Is the data normally distributed? Specifically, why is the data not uniformly distributed, or distributed in some other way?
Normal data is clustered around the mean; what might cause the data you identified to have a different shape and not be clustered around the mean?

Expert Solution

milcah answered 1 year ago

identify (but don’t collect) a type of dataset that might vary significantly from its mean. (Examples...

identify (but don’t collect) a type of dataset that might vary significantly from its mean. (Examples may be adult’s weights or BMIs, a company’s sales, or the number of pieces of mail you receive in a week. Using your imaginary dataset, answer the following questions: What is a brief description of the data? How much would you expect the data to vary? What might the causes of the variation be?

Is “age” in the Patients dataset (Excel) normally distributed?

Instructions Question: Is “age” in the Patients dataset (Excel) normally distributed? To answer this question, follow the directions in Chapter 6 (Comparing Data Characteristics to Theoretical Properties and Constructing the Normal Probability Plot). (15 points) Assuming that the “age” variable for the individuals in the Patients dataset is normally distributed, what is the probability that the age of a patient in this dataset: (15 points) Is less than 45? Is greater than 55? Lies between 45 and 55? When...

A sample dataset with 25 values was randomly generated from a normally distributed random variable with...

A sample dataset with 25 values was randomly generated from a normally distributed random variable with a mean of 100. The randomly selected data points are presented in the following table: 91 90 103 94 103 88 110 89 80 99 123 99 100 88 103 103 91 122 90 100 120 98 97 107 97 What kind of sample data do you have? Select the appropriate type of data One sample Paired sample Two samples Based on what you know...

The life in hours of a certain type of lightbulb is normally distributed with a known...

The life in hours of a certain type of lightbulb is normally distributed with a known standard deviation of 10 hours. A random sample of 15 lightbulbs has a sample mean life of 1000 hours. What would the 99% lower-confidence bound L on the mean life be, rounded to the nearest integer?

The lifetimes of lightbulbs of a particular type are normally distributed with a mean of 400...

The lifetimes of lightbulbs of a particular type are normally distributed with a mean of 400 hours and a standard deviation of 10 hours. What percentage of the bulbs have lifetimes that lie within 2 standard deviations to either side of the mean? Use the Empirical Rule and write your answer as a percent rounded to 2 decimal places.

The lifetime of a certain type of battery is normally distributed with a mean of 1000...

The lifetime of a certain type of battery is normally distributed with a mean of 1000 hours and a standard deviation of 100 hours. Find the probability that a randomly selected battery will last between 950 and 1000 (round answers to three decimal places, example 0.xxx)? The lifetime of a certain type of battery is normally distributed with a mean of 1000 hours and a standard deviation of 100 hours. Find the probability that a randomly selected battery will last...

The lifespan of a particular type of robotic arm is known to be normally distributed with...

The lifespan of a particular type of robotic arm is known to be normally distributed with a mean of 17 months and a standard deviation of 3 months. Suppose that eight robotic arms are selected at random. What is the probability that exactly four out of the eight robotic arms will have a lifespan which is less than 16 months

The thickness of a type of veneer is approximately normally distributed with mean 5 mm and...

The thickness of a type of veneer is approximately normally distributed with mean 5 mm and standard deviation 0.2 mm. a) What is the probability the thickness of a randomly selected piece is between 4.7 and 5.25 mm? b) What is the probability the thickness of a randomly selected piece is greater than 5.3 mm? c) What thickness is the 45th percentile (45% of the thicknesses are less than that value)? d) What thicknesses constitute the middle 80% of the...

Suppose that the weights of a certain type of bear are normally distributed with mean 332 ...

Suppose that the weights of a certain type of bear are normally distributed with mean 332 lbs and standard deviation 24 lbs. If three such bears are randomly selected, find the probability that exactly two of them have a weight that is less than 354 lbs. (4 decimals)

Suppose that the weights of a certain type of bear are normally distributed with mean 321 ...

Suppose that the weights of a certain type of bear are normally distributed with mean 321 lbs and standard deviation 25 lbs. If three such bears are randomly selected, find the probability that exactly one of them has a weight that is less than 342 lbs. answer correct to 4 decimal places

Question