Mathematics, 17.04.2021 07:00 bckyanne3

Scores at a local high school on the American College Testing (ACT) college entrance exam follow the normal distribution with a mean of 18 and a standard deviation of 8. A guidance counselor takes a random sample of 20 students and calculates the mean score, x¯. (a) Calculate the mean and standard deviation of the sampling distribution of x¯.
(b) Interpret the standard deviation from part (a).
(c) Find the probability that a sample of 20 students has a mean score of 19.5 or more.

Answers: 1

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 20:00

What is the radical expression that is equivalent to the expression 27 1 over 5?

Answers: 3

Answer

Mathematics, 21.06.2019 23:30

Solve the equation: x - 9 = -6 + 5 a. 21 b. 7 c. 14 d. 2

Answers: 2

Answer

Mathematics, 22.06.2019 00:30

Will mark ! (10 points also! ) if x varies inversely with y and x =6 when y= 10, find y when x=8 a. y=4.8 b. y=7.5 c. y=40/3 d. y=4/15

Answers: 1

Answer

Mathematics, 22.06.2019 04:20

What percent of the butterfly tents contain at most 10 cocoons

Answers: 2

Answer

You know the right answer?

Scores at a local high school on the American College Testing (ACT) college entrance exam follow the...

Questions

Mathematics, 06.11.2019 19:31

Keri is making a doll clothes for a holiday craft show. the wholesale cost of the materials for one outfit is $9.38. if she sells an outfit for $15, w...

Physics, 06.11.2019 19:31

The distance between the centers of the wheels of a motorcycle is 156 cm. the center of mass of the motorcycle, including the rider, is 77.5 cm above...

Business, 06.11.2019 19:31

Minarski electronics sells computers and provides hardware maintenance services. on april 1st, minarski sold a package deal containing a computer and...

Business, 06.11.2019 19:31

Kyle, a single taxpayer, worked as a free-lance software engineer for the first three months of 2017. during that time, he earned $44,000 of self-empl...

Engineering, 06.11.2019 19:31

Consider a silicon p-n step junction (or abrupt junction) at room temperature. if the doping concentrations are na = 10^17 cm^-3 and nd = 10^14 cm^-3...

Social Studies, 06.11.2019 19:31

Diane is a successful 25-year-old lawyer and usually does not experience much stress. she recently lost her mother to a sudden illness and was very up...

Physics, 06.11.2019 19:31

Ken's prediction for december was –5°c. the actual low temperature was 3 degrees higher than his prediction. the actual low temperature in december wa...

Business, 06.11.2019 19:31

Last year, aleshia identified $26,200 as a nonbusiness bad debt. in that tax year before considering the tax implications of the nonbusiness bad debt,...

Business, 06.11.2019 19:31

Label the scenarios as examples of elastic, inelastic, or unit elastic demand. when ruko, a device used to stream movies at home, increases prices by...

Mathematics, 06.11.2019 19:31

Kevin delivers groceries to people’s homes. he charges a fixed rate per mile and also a fixed delivery fee. when kevin makes a 10-mile trip to deliver...

English, 06.11.2019 19:31

Lesson 12: identify multiple choice activity according to audio instructions. then, select yes or no to indicate whether the statements you hear are...

Mathematics, 06.11.2019 19:31

Lesson 9: foundations for algebra unit test for connections academy, only if u have a good score and most answers : )...

Business, 06.11.2019 19:31

Larry recently invested $24,400 (tax basis) in purchasing a limited partnership interest in which he will have no management rights in the company. hi...

Mathematics, 06.11.2019 19:31

Kenny reads 4/9 page in 3/5 min. what is kenny's unit rate? step by step....

Business, 06.11.2019 19:31

Laurel enterprises expects earnings next year of $3.68 per share and has a 30 % retention rate, which it plans to keep constant. its equity cost of ca...

English, 06.11.2019 19:31

Lesson 1: what is important to know? language arts 6 a unit 3: life stories instruction answers im in 6 grade...

Mathematics, 06.11.2019 19:31

Kurtis is a statistician who claims that the average salary of an employee in the city of yarmouth is no more than $55,000 per year. gina, his colleag...

English, 06.11.2019 19:31

Key ideas and details: quote one line of dialogue that sets the action of the story in motion...

Mathematics, 06.11.2019 19:31

Lenovo uses the zx-81 chip in some of its laptop computers. the prices for the chip during the last 4 months were as follows: month price per chip ja...

Business, 06.11.2019 19:31

La bella pizza can produce a pizza for a marginal cost of $6. its price is a pizza for $20. (i) could labella pizza make a larger economic profit by o...

More questions: Mathematics Another questions