statistics

posted by .

It appears to people who are mildly obese are less active than leaner people. One study looked at the average number of minutes per day that people spend standing or walking. Among mildly obese people, minutes of activity varied according to the N(373,67) distribution. Minutes of activity for lean people had the N(526,107) distribution. Within what limits do the active minutes for 95% of the people in each group fall? Use the 68-95-99.7 rule.

I have no idea where to even begin to try and answer this. I am so lost. Please help!! Thanks!

  • statistics -

    About 95% of a normal distribution lies within 2 standard deviations of the mean.

    N(373,67) means the distribution is a normal distribution with mean = 373 and the variance = 67 (standard deviation = square root of 67).

    N(526,107) means the distribution is a normal distribution with mean = 526 and the variance = 107 (standard deviation = square root of 107).

    Determine the limits by using the mean and standard deviation. Remember to determine 2 standard deviations below the mean and 2 standard deviations above the mean for your limits.

    I'll let you take it from here.

  • statistics -

    N(373,67) means the distribution is a normal distribution with mean = 373 and the variance = 67 (standard deviation = square root of 67).

  • statistics -

    N(373, 67) distribution

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    My daughter's homework and I cant figure it out for the life of me. In America the average person spends about 9.5 billion minutes on the phone a business day. In 1997 the estimated population of Americans the ages of 19-64 is about …
  2. biology

    Leptin is a hormone that is produced by fat cells and plays a role in body metabolism and obesity. Studies have demonstrated that when obese mice are injected with leptin they quickly lose their excess weight. Interestingly, however, …
  3. Math-Statistics

    It appears that people who are mildly obese are less active than leaner people. One study looked at the average number of minutes per day that people spend standing or walking. Among mildly obese people, minutes of activity varied …
  4. statistics

    Bill spends an average of 5 minutes each day waiting in lines. If Bill is typical of the 290 million people in the United States, which of the following expresses the approximate combined amount of time these people spend annually …
  5. math

    The owner of a luxury motor yacht that sails among the 4000 Greek islands charges $630 per person per day if exactly 20 people sign up for the cruise. However, if more than 20 people (up to the maximum capacity of 90) sign up for the …
  6. Statistics

    The average amount of time people spend on facebook each day is 71 minutes, with a standard deviation of 4.7 minutes. Are you more likely to select a random person that spends less than 68 minutes per day, or a group of 35 people that …
  7. statistics

    The average amount of time people spend on facebook each day is 71 minutes, with a standard deviation of 4.7 minutes. Are you more likely to select a random person that spends less than 68 minutes per day, or a group of 35 people that …
  8. Math

    The owner of a luxury motor yacht that sails among the 4000 Greek islands charges $430 per person per day if exactly 20 people sign up for the cruise. However, if more than 20 people (up to the maximum capacity of 90) sign up for the …
  9. math

    The owner of a luxury motor yacht that sails among the 4000 Greek islands charges $630 per person per day if exactly 20 people sign up for the cruise. However, if more than 20 people (up to the maximum capacity of 90) sign up for the …
  10. statistics

    according to the health and exam survey (1999-2008)35.7% of u.s adults were consdered obese(body mass greater then30)if two people in the u.s are selected at random is the probability that both are obese

More Similar Questions