Question

75. Salaries for teachers in a particular elementary school district are normally distributed with a mean...

75.

Salaries for teachers in a particular elementary school district are normally distributed with a mean of $44,000 and a standard deviation of $6,500. We randomly survey ten teachers from that district.

  1. In words, X = ______________
  2. X ~ _____(_____,_____)
  3. In words, ΣX = _____________
  4. ΣX ~ _____(_____,_____)
  5. Find the probability that the teachers earn a total of over $400,000.
  6. Find the 90th percentile for an individual teacher's salary.
  7. Find the 90th percentile for the sum of ten teachers' salary.
  8. If we surveyed 70 teachers instead of ten, graphically, how would that change the distribution in part d?
  9. If each of the 70 teachers received a $3,000 raise, graphically, how would that change the distribution in part b?
Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1


0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Salaries for teachers in a particular elementary school district are normally distributed with a mean of...
Salaries for teachers in a particular elementary school district are normally distributed with a mean of $45,000 and a standard deviation of $6,100. We randomly survey ten teachers from that district. (Round your answers to the nearest dollar.) (a) Find the 90th percentile for an individual teacher's salary. $ (b) Find the 90th percentile for the average teacher's salary. $
Salaries for teachers in a particular elementary school district are normally distributed with a mean of...
Salaries for teachers in a particular elementary school district are normally distributed with a mean of $44,000 and a standard deviation of $6,500. We randomly survey ten teachers from that district. Using Excel and the functions, show me how you got your answer Find the 90th percentile for an individual teacher’s salary. Find the 90th percentile for the average teacher’s salary.
Assume that the salaries of elementary school teachers in the United States are normally distributed with...
Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of 32,000 and a standard deviation of 3,000. If 100 teachers are randomly selected, find the probability that their mean salary is less than 32,000.
1) Assume that the salaries of elementary school teachers in the United States are normally distributed...
1) Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $32,0000 and a standard deviation of $3000. If 100 teachers are randomly selected, find the probability that their mean salary is greater than $32,500. 2) A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of...
In one school district, there are 135 elementary school (K-5) teachers, of which 19 are male...
In one school district, there are 135 elementary school (K-5) teachers, of which 19 are male (or male-identifying). In a neighboring school district, there are 117 elementary teachers, of which 20 are male. A policy researcher would like to calculate the 90% confidence interval for the difference in proportions of male teachers. To keep the signs consistent for this problem, we will calculate all differences as p1−p2. That is, start with the percentage from the first school district and then...
1.)The patient recovery time from a particular surgical procedure is normally distributed with a mean of...
1.)The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.7 days and a standard deviation of 2.4 days. What is the 70th percentile for recovery times? (Round your answer to two decimal places.) 2.)Terri Vogel, an amateur motorcycle racer, averages 129.71 seconds per 2.5 mile lap (in a 7 lap race) with a standard deviation of 2.28 seconds. The distribution of her race times is normally distributed. We are interested in one of...
The percent of fat calories that a person in America consumes each day is normally distributed...
The percent of fat calories that a person in America consumes each day is normally distributed with a mean of about   45   and a standard deviation of   7.5 . Suppose that one individual is randomly chosen. Let   X=   percent of fat calories. In each appropriate box you are to enter either a rational number in "p/q" format or a decimal value accurate to the nearest   0.01 . (.25)   X∼    (pick one) UBNE   (    ,    ) . (.25) The probability that a person consumes...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT