Researchers at Texas A&M studied the effect of using standing height desks in an elementary school on the energy expended by nine students. In their paper about the study, they reported descriptive statistics for the nine students. These descriptive statistics were expressed as a mean plus or minus a standard deviation. One such descriptive statistic was the weight of students before using the standing desks, which was reported as 27.0 + 7.9 kilograms. (This exercise is also a warning to read carefully: that 27.0 + 7.9 is not a confidence interval, yet summaries in this form are common in scientific reports.) What is x for these students? (Round your answer to a whole number). kg x = What is the standard error of the mean for these students? (Round your answer to 3 decimal places.) kg SE =

Researchers at Texas A&M studied the effect of using standing height desks in an elementary school on the energy expended by nine students. In their paper about the study, they reported descriptive statistics for the nine students. These descriptive statistics were expressed as a mean plus or minus a standard deviation. One such descriptive statistic was the weight of students before using the standing desks, which was reported as 27.0 + 7.9 kilograms. (This exercise is also a warning to read carefully: that 27.0 + 7.9 is not a confidence interval, yet summaries in this form are common in scientific reports.) What is x for these students? (Round your answer to a whole number). kg x = What is the standard error of the mean for these students? (Round your answer to 3 decimal places.) kg SE =

Name: Researchers at Texas A&M studied the effect of using standing height
Uploaded: 2024-03-20T07:06:16.000Z
Channel: Bartleby
Description: Researchers at Texas A&M studied the effect of using standing height desks in an elementary school on the energyexpended by nine students. In their paper about the study, they reported descriptive statistics for the nine students. Thesedescriptive s

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: The mean value of land and buildings per acre from a sample of farms is $1500, with a standard…

A: The mean is 1500 and the standard deviation is 300.

Q: Would a person spending $476 on their car be considered usual or unusual if the amount spent by the…

A: Given information- Population mean µ = $347 Population standard deviation, σ = $39.58 Let, X be the…

Q: Former basketball player, Rebecca Lobo, is 6'4" (or 76 inches). Suppose the average height of women…

A: We know, (1 foot = 12 inch)Given;X: height of womenmean(X)=μ=5'4''(i.e. 5 foot 4 inches)=64''(i.e.…

Q: Raul received a score of 73 on a history test for which the class mean was 70 with a standard…

A: Here we need to find the z score and for that, we have to use the formula z = Value-meanStandard…

Q: minimum shoulder girth is 87 cm and the maximum shoulder girth is 134 cm. The mean shoulder girth is…

A: Solution: Given information: Let x = Shoulder girth and y= height x = 108.87sx=10.12y= 173.86 sy=…

Q: Suppose that the exam scores of a statistics class were normally distributed with a mean of 94 and…

A: Solution: Let X be the exam score of a statistics class. From the given information, X follows…

Q: Private high schools often have entrance exams to assess the educational background of perspective…

A: Given Information: Brayden scored 174 on the Xavier high school admissions exam. Brayden scored 290…

Q: I surveyed a sample of 68 customers in a business to see how much they spend in there. Would this…

A: Parameter: Any statistical measure based on all units in the population is called Parameter.…

Q: If you have 100 people in your sample, what would be the degrees of freedom you use to calculate the…

A: Given, n=100 Degree of freedom(df)=?

Q: In a normally distributed data set with a mean of 24 and a standard deviation of 4.2, what…

Q: The average McDonald's restaurant generates $3.6 million in sales each year with a standard…

A: For the MacDonald's restaurant the following information is provided. Average μ=3.6 Standard…

Q: A standardized measure of achievement motivation is modeled by a normal distribution with a mean of…

A: Obtain the achievement score The achievement score is obtained below as follows:

Q: A teacher found that the mean number of hours her 12 students spent studying for an AP Statistics…

A: old mean for 12 students = 6.7 sum of 12 students = 6.7*12 = 80.4

Q: The average McDonald's restaurant generates $2.3 million in sales each year with a standard…

A: Here, population standard deviation is known, so we can perform a z-test .

Q: A successful basketball player has a height of 6 feet 8 inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: Almost all medical schools in the United States require students to take the Medical College…

A: From the provided information, Mean (µ) = 500.0 Standard deviation (σ) = 10.6 Let X be a random…

Q: Angela polled her first grade class about their family pets. The following data lists the number of…

Q: 58.6. Assume that 107 men and 244 women were sampled, and that the standard deviations were 24.3 for…

A: Given that, The Pew Internet and American Life Project surveyed 351 adults in 2019, asking them…

Q: Tom scored a 125 on a measure of math ability and a 42 on a measure of verbal ability.The means and…

Q: The average McDonald's restaurant generates $3.4 million in sales each year with a standard…

Q: Suppose you read in the newspaper that registered nurses earned an average annual salary of $49,110…

A: Claim : salary was significantly lower than the $49,110.

Q: One year, many college-bound high school seniors in the US took the SAT. For the verbal portion of…

A: According to the given information in this question We need to find the percentage of students would…

Q: Is it worth pursuing a doctoral degree in education if you already have an undergraduate degree? One…

A: Let Population 1 be the salaries for people with doctoral degrees and Population 2 be the salaries…

Q: In some reports, the mean and coefficient of variation are given. For instance, one report gives the…

A: given data cv = 1.9% μ = 3.2σ = ?

Q: John got 83 on a test, with a standard deviation of 10.73 and the class mean was 77.1. Paul got 88…

A: From the provided information, John got (X) 83 on a test with a standard deviation (σ) of 10.73 and…

Q: The average McDonald's restaurant generates $2 million in sales each year with a standard deviation…

A: Sample (x) (x-x̄)2 1 2.6 0.1089 2 3.2 0.8649 3 2.2 0.0049 4 2.6 0.1089 5 2.2 0.0049 6…

Q: The average McDonald's restaurant generates $3.2 million in sales each year with a standard…

Q: Three potential employees took an aptitude test. Each person took a different version of the test.…

A: The raw score of Cade is 95.5. For Cade's version of the test, the mean, μ=64.7, and the standard…

Q: Use the sample mean(78.5)and sample standard deviation (12.3671)in your calculations below. Use…

A: Given information:

Q: Lightbulbs are measured in lumens (light output), watts (energy use), and hours (life). A standard…

A: Given:- Standard white light bulb mean = 675 hours…

Concept explainers

Inverse Normal Distribution

The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.

Mean, Median, Mode

It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.

Z-Scores

A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.

Topic Video

Question

100%

Researchers at Texas A&M studied the effect of using standing height desks in an elementary school on the energy
expended by nine students. In their paper about the study, they reported descriptive statistics for the nine students. These
descriptive statistics were expressed as a mean plus or minus a standard deviation. One such descriptive statistic was the
weight of students before using the standing desks, which was reported as 27.0 + 7.9 kilograms. (This exercise is also a
warning to read carefully: that 27.0 + 7.9 is not a confidence interval, yet summaries in this form are common in scientific
reports.)
What is x for these students? (Round your answer to a whole number).
kg
What is the standard error of the mean for these students? (Round your answer to 3 decimal places.)
kg
SE =
Publishen W.H. Freeman
Question Source: Moore, The Basic Practice Of Statistics, &e
delete
prt sc
insert

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Centre, Spread, and Shape of a Distribution$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.

Similar questions

The golf scores for a school team were normally distributed with a mean of 68 and a standard deviation of 3. Use the z table to find the 30th percentile and interpret it in a complete sentence.
Is it worth pursuing a doctoral degree in education if you already have an undergraduate degree? One way to help make this decision is to look at the mean incomes of these two groups. Suppose that 1414 people with bachelor’s degrees in education were surveyed. Their mean annual salary was $34,000$⁢34,000 with a standard deviation of $9100$⁢9100. Sixteen people with doctoral degrees in education were found to have a mean annual salary of $47,000$⁢47,000 with a standard deviation of $5200$⁢5200. Assume that the population variances are not the same. Construct a 95%95% confidence interval to estimate the true difference between the mean salaries for people with doctoral degrees and undergraduate degrees in education. Let Population 1 be the salaries for people with doctoral degrees and Population 2 be the salaries for people with undergraduate degrees. Round the endpoints of the interval to the nearest whole number, if necessary.
In one town, the number of pounds of sugar consumed per person per year has a mean of 6 pounds and a standard deviation of 1.5 pounds. Tyler consumed 10.5 pounds of sugar last year. What percentage of people in the town consumed less sugar than tyler?
Please solve using R
Use z scores to compare the given values. The tallest living man at one time had a height of 225 cm. The shortest living man at that time had a height of 136.8 cm. Heights of men at that time had a mean of 173.31 cm and a standard deviation of 5.54 cm. Which of these two men had the height that was more extreme?
Compare the mean, median, and mode in terms of their sensitivity to extreme scores
Which statistic would you use if you are interested in comparing the mean number of hours worked by sex.
The average chef at a restaurant earns $17 an hour with a deviation of $1.75. What are the chances that someone is earning more than $20 an hour?
Is it worth pursuing a doctoral degree in education if you already have an undergraduate degree? One way to help make this decision is to look at the mean incomes of these two groups. Suppose that 1212 people with bachelor’s degrees in education were surveyed. Their mean annual salary was $42,000$⁢42,000 with a standard deviation of $9800$⁢9800. Fifteen people with doctoral degrees in education were found to have a mean annual salary of $50,000$⁢50,000 with a standard deviation of $9200$⁢9200. Assume that the population variances are not the same. Construct a 90%90% confidence interval to estimate the true difference between the mean salaries for people with doctoral degrees and undergraduate degrees in education. Let Population 1 be the salaries for people with doctoral degrees and Population 2 be the salaries for people with undergraduate degrees. Round the endpoints of the interval to the nearest whole number, if necessary.
The Jimmy John’s store manager on Hwy. 46 wanted to know more about their customers. She decides to focus on two variables: the average ticket spent by customers, and whether customers would consider purchasing ice cream if it was available. She interviewed 54 customers over a two-week period. Results of her research showed average ticket was $10.89 with a standard deviation of $2.35. Twenty-two customers said they would purchase ice cream if it was available. INCLUDE EXCEL EQUATIONS. Assume the store manager wants to conduct a similar survey at the National Road store. Answer the following questions: c. What sample size is needed to have 95% confidence of estimating the population average ticket in this store to within plus/minus $1.00 if the standard deviation is assumed to be $2.35? d. How many customers need to be selected to have 90% confidence of estimating the population proportion who would consider purchasing ice cream plus/minus 0.10 (10%)?
The Pew Internet and American Life Project surveyed 351 adults in 2019, asking them about their texting habits. Among men, the mean number of text messages sent per day was 54.2, and among women it was 58.6. Assume that 107 men and 244 women were sampled, and that the standard deviations were 24.3 for men and 20 for women. Can you conclude that the mean number of text messages differs between men and women? Use the a = 0.08 level. a. State the null and alternative hypotheses. Ho: H₁ V OF H₂ H₁: H₁ ✓ -3 -2 -1 0 b. Find the critical value and sketch the rejection region. Sketch of Rejection Region: Critical value(s): homin 2 3 -3 -2 -1 0 2 3 -3 -2 -1 0 -1.756, 1.7 x c. Find the test statistic. = V -1.773 X OF (If there are two critical values, list both values separated by a comma) d. Find the p-value. H₂ 0.0771 X 2 3 ४
On a verbal skill test, the mean was 72 and the standard deviation was 7. If John scored 75, what was his z-score?