/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q T2.13. A study recorded the amount of o... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 2: Q T2.13. (page 150)

A study recorded the amount of oil recovered from the 64 wells in an oil field, in thousands of barrels. Here are descriptive statistics for that set of data from statistical software.

Based on the summary statistics, is the distribution of amount of oil recovered from the wells in this field approximately Normal? Justify your answer.

Short Answer

Expert verified

Not approximately normal.

Step by step solution

01

Given information




Descriptive Statistics Oilprod




VariableNMeanMedianStDevMinMaxQ1Q3
Oilprod6448.2537.8040.242.00204.9021.4060.75
02

Explanation

The mean is significantly bigger than the median, showing that the distribution is right-skewed because any large or small data values effect the mean far more than the median. Their minimum and maximum values are 2and 204.90respectively, indicating that the minimum value is substantially closer to the mean and median than the maximum value of 204.90The distribution is not approximately normal because it is right-skewed where the normal distribution is symmetric.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Potato chips Refer to Exercise 47 Use the 68鈥�95鈥�99.7 rule to answer the

following questions.

a. About what percent of bags weigh less than 9.02 ounces? Show your method clearly.

b. A bag that weighs9.07 ounces is at about what percentile in this distribution? Justify your answer.

Shoes How many pairs of shoes does a typical teenage boy own? To find out,

two AP庐 Statistics students surveyed a random sample of 20 male students from their large high school. Then they recorded the number of pairs of shoes that each boy owned. Here is a dot-plot of the data:

a. Find the percentile for Jackson, who reported owning 22 pairs of shoes.

b. Raul鈥檚 reported number of pairs of shoes is at the 45th percentile of the distribution. Interpret this value. How many pairs of shoes does Raul own?

Where鈥檚 the bus? Sally takes the same bus to work every morning. The

amount of time (in minutes) that she has to wait for the bus can be modeled by a uniform distribution on the interval from 0 minutes to 10 minutes.

a. Draw a density curve to model the amount of time that Sally has to wait for the bus. Be sure to include scales on both axes.

b. On what percent of days does Sally wait between 2.5 and 5.3 minutes for the bus?

c. Find the 70th percentile of Sally鈥檚 wait times.

A different species of cockroach has weights that are approximately Normally distributed with a mean of 50 grams. After measuring the weights of many of these cockroaches, a lab assistant reports that 14% of the cockroaches weigh more than 55 grams. Based on this report, what is the approximate standard deviation of weight for this species of cockroaches?

a.4.6b.5.0c.6.2d.14.0

e. Cannot determine without more information.

Standard Normal areas Find the proportion of observations in a standard Normal distribution that satisfies each of the following statements.

a. z<鈭�2.46

b. 0.89<z<2.46
See all solutions

Recommended explanations on Math Textbooks

Discrete Mathematics

Read Explanation

Geometry

Read Explanation

Calculus

Read Explanation

Decision Maths

Read Explanation

Applied Mathematics

Read Explanation

Mechanics Maths

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.