Kindergarten children have heights that are approximately, Ask an Expert

Statistics

Kindergarten children have heights that are approximately normally distributed about a mean of 39.7 inches and a standard deviation of 2.2 inches. If a random sample of 21 is taken, what is the probability that the sample of kindergarten children has a mean height of less than 38.9 inches? (Give your answer correct to four decimal places.)

Exact answers only please.

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9987984

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

A company that manufactures gasoline station pumps must

A company that manufactures gasoline station pumps must ensure that it pumps at least 1 gallon of gasoline 84% of the time. If the population of pump amounts for a particular pump is normally distributed with mean μ and ...

The commissioner of the state police is reported as saying

The commissioner of the state police is reported as saying that about 10% of reported auto thefts involve owners whose cars haven't really been stolen. What null and alternative hypotheses would be appropriate in evaluat ...

You apply both valuation criteria and financial strength

You apply both valuation criteria and financial strength criteria in choosing stocks. The probability that a randomly selected stock from your investment universe meets your valuation criteria is 0.25. Given that a stock ...

A survey is conducted from a population of people of whom

A survey is conducted from a population of people of whom 65?% have a college degree. The following sample data were recorded for a question asked of each person? sampled, "Do you have a college? degree?" Complete parts ...

If you want to be 95 confident of estimating the population

If you want to be 95?% confident of estimating the population mean to within a sampling error of ±25 and the standard deviation is assumed to be 125?, what sample size is? required?

A researcher wants to determine if there is an association

A researcher wants to determine if there is an association between religious affiliation (e.g., Christian, Muslim, Jewish. Buddhist, Unaffiliated, etc.) and ethnicity (African American, Asian, American Indian, Whte, Othe ...

A professor teaches two statistics classes the morning

A professor teaches two statistics classes. The morning class has 25 students and their average on the first test was 82. The evening class has 15 students and their average on the same test was 74. What is the average o ...

A student must answer 6 multiple choice questions for a

A student must answer 6 multiple choice questions for a test, but the student did not study well. There are 6 answers per question, but only one is correct. If the student randomly guesses on each questions, what is the ...

Performance scores on a motor skills task form a normal

Performance scores on a motor skills task form a normal distribution with μ = 20 and σ = 4. A psychologist is using this task to determine the extent to which increased self-awareness affects performance. The prediction ...

1 three experiments investigating the relation between need

1. Three experiments investigating the relation between need for cognitive closure and persuasion were performed. Part of the study involved administering a "need for closure scale" to a group of students enrolled in an ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert