This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A company has developed a new battery, but the average lifetime is unknown. In order to estimate ... (Read 56 times)

theo

  • Hero Member
  • *****
  • Posts: 698
on: Jun 24, 2018
A company has developed a new battery, but the average lifetime is unknown. In order to estimate this average, a sample of 110 batteries is tested and the average lifetime of this sample is found to be 200 hours. The 200 hours is the value of a:
 
  A) parameter.
  B) statistic.
  C) sampling frame.
  D) population.

Question 2

A professor collected data on the number of absences in an introductory statistics class of 100 students over the course of a semester. The data are summarized below.
 
  Number of Absences 0 1 2 3 4 5 6
  Number of Students 5 13 24 23 17 11 7
  What is the weighted mean number of absences per semester?
  A) 3.14
  B) 2.0
  C) 2.95
  D) 3.07


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

stillxalice

  • Sr. Member
  • ****
  • Posts: 339
Reply #1 on: Jun 24, 2018
Answer to Question 1

B

Answer to Question 2

C


theo

  • Member
  • Posts: 698
Reply 2 on: Jun 24, 2018
Gracias!

blakcmamba

  • Member
  • Posts: 335
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Did you know?

For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Although average brain size increases gradually though time in H. erectus, individuals with small br Although average brain size increases gradually though time in H. erectus, individuals with small br
Change in Emotional States During Adolescence Average emotional state becomes teadilyi more negativ Change in Emotional States During Adolescence Average emotional state becomes teadilyi more negativ
Rank-order correlations show that differential consistency remains high from childhood through late ... Rank-order correlations show that differential consistency remains high from childhood through late ...
On average, students in Roman Catholic schools score higher on national tests than students in ... On average, students in Roman Catholic schools score higher on national tests than students in ...
The prefrontal lobotomy procedure developed by Moniz and Lima. The prefrontal lobotomy procedure developed by Moniz and Lima.
For each function f(x) = 6x^2 - 4, estimate the instantaneous rate of change for the given ... For each function f(x) = 6x^2 - 4, estimate the instantaneous rate of change for the given ...
Video: Role of the respiratory system - effect of altered ventilation rates

For a complete list of videos, visit our video library