ZuoTi.Pro
Question

Given a frequency distribution of 10,000 scores, which approximates the normal curve and has a mean...

Given a frequency distribution of 10,000 scores, which approximates the normal curve and has a mean of 120 and a standard deviation of 15, the top 80% had a what raw score or greater?

a. 106

b. 94.34

c. 110

d. 107.4

The highway department conducted a study measuring driving speeds on a local section of interstate highway. They found an average speed of 58 miles per hour with a standard deviation of 10. Given this information, what proportion of the cars are traveling between 45 and 70 miles per hour?

a .3849 or 38.49%

b .7881 or 78.81%

c .4043 or 40.32%

d .8000 or 80.00%

It is known that IQ scores form a normal distribution with a mu of 100 and a standard deviation of 15. Given this information, what is the probability of randomly selecting an individual with an IQ score less than 120?

a.95%

b.9.72%

c.90.15%

d.Unable to answer this question with information given.

math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

Dete mean a u 120 narmal dable Oe 20 -12-624 + 120-博, 10 1 0 hiven thadt selecting an inolivida itin an 15 - P (z< 1:33 ) O. 1032

0 0
Add a comment
Know the answer?
Add Answer to:
Given a frequency distribution of 10,000 scores, which approximates the normal curve and has a mean...
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. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • Given a frequency distribution of 10,000 scores which has a mean of 120 and a standard...

    Given a frequency distribution of 10,000 scores which has a mean of 120 and a standard deviation of 15, 94.13% of those tested scored 135 or below. T or F The highway department conducted a study measuring driving speeds on a local section of the interstate highway. They found an average speed of mu=58 miles per hour with a standard deviation of 10. Given this information, what proportion of the cards are traveling between 55 and 65 miles per hour?...

  • Use the normal distribution of IQ scores, which has a mean of 125 and a standard...

    Use the normal distribution of IQ scores, which has a mean of 125 and a standard deviation of 13, and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. :: Click the icon to view the table. %. Percentage of scores greater than 99 is (Round to two decimal places as needed.) i Data Table Standard Scores and Percentiles for a Normal Distribution Full data set e Standard score % Standard...

  • Use the normal distribution of IQ​ scores, which has a mean of 105 and a standard...

    Use the normal distribution of IQ​ scores, which has a mean of 105 and a standard deviation of 13​, and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. Percentage of scores greater than 105 is _____ (​Round to two decimal places as​ needed.) Standard score Percent -3 0.13 -2.5 0.62 -2 2.28 -1.5 6.68 -1 15.87 -0.9 18.41 -0.5 30.85 -0.1 46.02 0 50 0.1 53.98 0.5 69.15 0.9 81.59...

  • (1 point) The distribution of IQ scores can be modeled by a normal distribution with mean...

    (1 point) The distribution of IQ scores can be modeled by a normal distribution with mean 100 and standard deviation 15. (a) Let x be a person's IQ score. Write the formula for the density function of IQ scores. p(x) = (b) Estimate the fraction of the population with IQ between 80 and 85. fraction =

  • Use the normal distribution of IQ​ scores, which has a mean of 85 and a standard...

    Use the normal distribution of IQ​ scores, which has a mean of 85 and a standard deviation of 18​, and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. The percentage of scores between 40 and 130 is ______​%. Full data set Standard score ​% Standard score ​% minus−3.0 0.13 0.1 53.98 minus−2.5 0.62 0.5 69.15 minus−2 2.28 0.9 81.59 minus−1.5 6.68 1 84.13 minus−1 15.87 1.5 93.32 minus−0.9 18.41 2...

  • Use the normal distribution of IQ​ scores, which has a mean of 125 and a standard...

    Use the normal distribution of IQ​ scores, which has a mean of 125 and a standard deviation of 11,and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. Percentage of scores greater than 152.5 is ___ % Standard score Percent -3 0.13 -2.5 0.62 -2 2.28 -1.5 6.68 -1 15.87 -0.9 18.41 -0.5 30.85 -0.1 46.02 0 50 0.1 53.98 0.5 69.15 0.9 81.59 1 84.13 1.5 93.32 2 97.72 2.5...

  • Given a distribution of scores with a mean of 40 and a standard deviation of 6,...

    Given a distribution of scores with a mean of 40 and a standard deviation of 6, convert the following scores to the standard scores indicated: a) X = 42 to a GRE score (a standard score with a mean of 500 and a standard deviation of 100) b) X = 29 to an IQ score (a standard score with a mean of 100 and a standard deviation of 15)

  • Use the normal distribution of IQ scores, which has a mean of 105 and a standard...

    Use the normal distribution of IQ scores, which has a mean of 105 and a standard deviation of 17, and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. Click the icon to view the table. Percentage of scores less than 139 is %. (Round to two decimal places as needed.)

  • QUESTION 1 The normal curve is particularly useful as a model for a. data in which...

    QUESTION 1 The normal curve is particularly useful as a model for a. data in which mean and median differ b. many populations of psychological and educational data c. distributions of sample statistics d. both (b) and (c) above QUESTION 2 A distribution has a mean of 60 and a standard deviation of 8. For a score of 72, the equivalent z score a. is +1.5 b. is between 0 and +1.0 c. is + 1.2 d. cannot be determined...

  • A normal distribution of scores has a mean of 240 and a standard deviation of 40....

    A normal distribution of scores has a mean of 240 and a standard deviation of 40. 1. What score separates the top 40% of the scores from the rest? 2. What score corresponds to the 90th percentile?

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT