Probability that randomly selected student has less score

Assignment Help Basic Statistics
Reference no: EM13136275

In 2000, as reported by ACT Research Service, the mean ACT Math score was μ=20.7. If ACT Math scores are normally distributed with σ = 5, answer the following questions.

a)What is the probability that a randomly selected student has an ACT Math score less than18?

b)What is the probability that a random sample of 10 ACT test takers had a mean ACT Math score less than 18?

Reference no: EM13136275

Questions Cloud

Distinguish between beliefs, values and customs : 1.Distinguish between beliefs, values and customs. Illustrate how the clothing a person wears at different times is influenced by customs.
Compute probability that students lie frequently : Compute the probability that, in a random sample of 500 students, at least 20 lie frequently, assuming the true percentage is 3%.
Units production-materials and conversion costs : Compute equivalent units production for both materials and conversion costs.
What volume of colbaat(iii)sulfate is required : what volume of .2500M colbaat(III)sulfate is required to react completely with 5.00 grams of sodium carbonate?
Probability that randomly selected student has less score : What is the probability that a randomly selected student has an ACT Math score less than18? What is the probability that a random sample of 10 ACT test takers had a mean ACT Math score less than 18?
What is the solubility product constant : What is the solubility product constant for Ag3PO4 if 6.37 mg of Ag3PO4 can be dissolved in 850 mL of water?
What are total fixes expenses : if the contribution margin ratio is 70% ,targeted operating income is $86000 and targeted sales in dollars is $480,000. what are total fixes expenses?
Compute the cost of goods sold : The manufacturing operations of REason,inc had the following balances for the month of January: Compute the cost of goods sold.
Is the sampling distribution approximately normal : Suppose a simple random sample of size n = 34 is obtained from a population with μ = 30 and σ = 4. Is the sampling distribution of x approximately normal.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Population mean and margin of error

A population is Normally distributed and has a σ = 24. Samples of size 25 have a sample mean of 100. Find the 90% confidence interval for the population mean.

  Probability computation for binomial distribution

A Myrtle Beach resort hotel has 120 rooms. In the spring months, hotel room occupancy is approximately 75%. What is the probability that at least half of the rooms are occupied on a given day?

  Find sufficient evidence average calorie content

1- ounce chocolate chip cookies resulted in following calorie amounts. At α=0.01 level, is there sufficient evidence that average calorie content is greater than 110 calories.

  Information about frequency distributions

You're the production manager for operation that produces circuit boards. Each board is tested at the end of manufacturing process. Rejected boards are discarded and have no future value.

  Find probability that exactly five jury members is women

The waiting room for jury selection has 40 women and 30 men to choose from. A jury of 12 is selected from these 70 people, what is the probability that exactly 5 of the jury members will be women?

  Normal distribution of sheet metal stamping machine

For the sheet-metal stamping machine in certain factory, the time between failures, X1 has a mean between the failures, of 56 hours and a variance of 16 hours.

  Function for total asset position

Pierre has a utility function for total asset position of u(x)=ln(x), His assets currently consist of $50,000 in cash and a rare violin he inherited from a rich uncle which is valued at $100,000.

  The empirical probability distribution

Determine the probability distribution associated with these data.

  Assumptions for chi-square tests

What are the four assumptions for the chi-square tests? What are the hypothesis when conducting the chi-square tests for goodness-of-fit?

  Plot the estimated regression function and the data

Obtain the estimated regression function. Plot the estimated regression function and the data. Does a linear regression function appear to give a good fit here?

  Problem of binomial probability

Ten asthmatics were asked to compare the effect of salbutamol and fenoterol sprays in relieving their asthma attacks. Assume that salbutamol and fenoterol are equal in terms of effectiveness and side effects in all people

  Construct a 95% confidence interval of the population

Construct a 95% Confidence Interval of the population mean of minutes exercised per week.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd