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

Author Question: A researcher believes that women today weigh less than in previous years. To investigate this ... (Read 61 times)

sarasara

  • Hero Member
  • *****
  • Posts: 521
on: Jun 19, 2018
A researcher believes that women today weigh less than in previous years. To investigate this belief, she randomly samples 41 adult women and records their weights. The scores have a mean of 111 lbs. and a standard deviation of 12.4 . A local census taken several years ago shows the mean weight of adult women was 115 lbs. The df for determining tcrit = _________.
 
  a. 41 c. 39
  b. 40 d. need more information

Question 2

The confidence interval for the population mean is _________.
 
  a. a range of values which probably contains the population mean
  b. a range of values which contains the population mean
  c. the same from sample-to-sample
  d. a range of values which probably contains the population meanand the same from sample-to-sample


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

lolol

  • Sr. Member
  • ****
  • Posts: 330
Reply #1 on: Jun 19, 2018
Answer to Question 1

B

Answer to Question 2

A


sarasara

  • Member
  • Posts: 521
Reply 2 on: Jun 19, 2018
Thanks for the timely response, appreciate it

bigcheese9

  • Member
  • Posts: 333
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Did you know?

Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

Did you know?

Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Measurements of solar cycle variation during the last 30 years Measurements of solar cycle variation during the last 30 years
Running time on 100-meter sprint for men and women master athletes increases with age. Source: Korho Running time on 100-meter sprint for men and women master athletes increases with age. Source: Korho
Review Cognitive Changes over the Adult Years Review Cognitive Changes over the Adult Years
Pregnant and Lactating Women, Children, the Ill, and Older Adults Are at the Highest Risk Pregnant and Lactating Women, Children, the Ill, and Older Adults Are at the Highest Risk
Patients Older than 60 Years of Age Patients Older than 60 Years of Age
A man put aside $5710.00 at the end of every 3 months for seven years. How much will he have ... A man put aside $5710.00 at the end of every 3 months for seven years. How much will he have ...
Video: Retina

For a complete list of videos, visit our video library