Stats

posted by .

nformation given:the distribution of male head circumference (HC) is normal with a mean of 56cm and a standard deviation of 1.8cm

first question
-the prob that HC of a random chosen man is larger than 57.8cm is?
Work: pr(x)>57.8cm
z=(57.8-56)=1.8--->.9641 i got it wrong?

Second ques:
what is is the sampling distrubution of the avg HC of 9 random selected men?

Third: the prob that the average HC of 9 random selected men is larger then 57.8cm is?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math (Statistic)

    Considered the sampling distribution of a sample mean obtained by random sampling from an infinite population. This population has a distribution that is highly skewed toward the larger values. a) How is the mean of the sampling distribution …
  2. stats

    Head lice can be a problem in classrooms. From the past experience, suppose it is predicted that 5% of the students will get lice if there are some reported cases. The health nurse checks 120 randomly chosen students and records the …
  3. statistics

    Information given:the distribution of male head circumference (HC) is normal with a mean of 56cm and a standard deviation of 1.8cm first question -the prob that HC of a random chosen man is larger than 57.8cm is?
  4. statistics

    Info given:With a random sample of 9 men. let X denote the number of men with head circumference larger than 57.8cm. the normal mean=56cm and standard dev=1.8cm. So this is a binomal dis- they ask; For X, calculate pr(X=2)?
  5. stats

    Info given:With a random sample of 9 men. let X denote the number of men with head circumference larger than 57.8cm. the normal mean=56cm and standard dev=1.8cm. So this is a binomal dis- they ask; For X, calculate pr(X=2)?
  6. MATH

    Which of the following normal distributions has the smallest spread?
  7. stats

    the head circumferences of adult males have a bell-shaped distribution with the mean= 65cm and standard deviation =2cm. a. what is the head circumference such that only 2.5% of adult males have a smaller head circumference?
  8. prob and stats

    11. Assume that the population of heights of male college students is approximately normally distributed with mean m of 72.15 inches and standard deviation s of 6.39 inches. A random sample of 96 heights is obtained. Show all work. …
  9. stats please help ASAP!!!

    A. The GPAs of all 5540 students enrolled at a University have an approximately normal distribution with a mean of 3.02 and a standard deviation of 0.29. Let x be the mean GPA of a random sample of 48 students selected from this University. …
  10. Statistics

    The following is a histogram (right skewed) of the first ten terms of a geometric distribution with p = .4. The mean of this distribution is 2.5 and the standard deviation is approximately 1.93. What's the shape of the distribution …

More Similar Questions