In the United States, first grade kids have an average friendliness score (FS) of 24 with...

In the United States, first grade kids have an average friendliness score (FS) of 24 with a standard deviation of 4. Also these first grade classes all have 23 students in them. Use this information to answer questions #26-#29.

What percent of classrooms have FS averages between 23.28 and 23.77?

What is the percentile rank of a child with FS equal to 22.88?

What percent of classrooms have FS averages less than 26?

What percent of classrooms have average friendliness scores between 24.11 and 24.37?

Solutions

Expert Solution

orchestra answered 2 years ago

Next > < Previous

Related Solutions

In addition to calculating and outputting each students quiz grade to calculate the average score for...

In addition to calculating and outputting each students quiz grade to calculate the average score for each quiz and the average of all the student quiz averages. Output the results at the bottom of each quiz column and the Quiz Average column (Row 22). Hint: Be careful when setting up your expression to calculate the average of all the quiz averages, this may require a slightly different expression then the others (not due to math). Student Quiz 1 Quiz 2...

The average price for a gallon of gasoline in the United States is 3.75 and in...

The average price for a gallon of gasoline in the United States is 3.75 and in Russia it is 3.37. Assume these averages are the population means in the two countries and that the probability distributions are normally distributed with a standard deviation of .25 in the United States and a standard deviation of .20 in Russia. a. What is the probability that a randomly selected gas station in the United States charges less than ________ per gallon (to 4...

The average price for a gallon of gasoline in the United States is $3.74 and in...

The average price for a gallon of gasoline in the United States is $3.74 and in Russia it is $3.4. Assume these averages are the population means in the two countries and that the probability distributions are normally distributed with a standard deviation of $0.25 in the United States and a standard deviation of $0.20 in Russia. a. What is the probability that a randomly selected gas station in the United States charges less than $3.65 per gallon (to 4...

A researcher drew a random sample of 24 people seeking asylum in the United States and...

A researcher drew a random sample of 24 people seeking asylum in the United States and recorded whether they were granted amnesty ("yes" or "no"). The researcher also grouped them according to their gender ("male" or "female"). The results are below: Granted General Amnesty Gender of Asylum Seeker Yes No Male 5 4 Female 8 7 Enter this information into SPSS. Use this information to answer questions #4 - #7. Question 4 Identify the null hypothesis and research (alternative) hypothesis....

The average LSAT score (the standardized test required to apply to law school) in the United...

The average LSAT score (the standardized test required to apply to law school) in the United States is µ =150 (σ = 10). Also, the LSAT is normally distributed. Use these parameters to answer the following questions: If someone took an LSAT test and received a 153, what proportion of scores will be less than this? If someone took an LSAT test and received a 143, what proportion of scores will be greater than this? What proportion of LSAT scores...

The average price for a gallon of gas in the United States is $1.80. Assume that...

The average price for a gallon of gas in the United States is $1.80. Assume that the population standard deviation is $0.50. (a) What is the probability that a sample of 100 gas stations will have a mean price per gallon within ±$0.06 of the population mean? (b) What is the probability that a sample of 100 gas stations will have a mean price per gallon of more than $1.77? (c) What is the probability that a sample of 100...

Suppose labor demand for low-skilled workers in the United States is w = 24 - 0.1L...

Suppose labor demand for low-skilled workers in the United States is w = 24 - 0.1L where L is the number of workers (in millions) and w is the hourly wage. There are 120 million domestic U.S. low-skilled workers who supply labor inelastically. If the U.S. opened its borders to immigration, 20 million low-skilled immigrants would enter the U.S. and supply labor inelastically. Draw a clearly labeled graph showing the equilibrium before immigration and the effect of opening the borders....

In the United States in 2007, the proportion of adults age 21-24 who had no medical...

In the United States in 2007, the proportion of adults age 21-24 who had no medical insurance was 28.1%. A survey of 75 recent college graduates in this age range finds that 30 of them are without insurance. Does this support a difference from the nationwide? • Perform a two-sided significance test in R for a proportion, following the procedure of seven steps in the lecture note (choose a significance level of 0.05). • Use the related function in R...

I have dataset to predict how pass or fail based on score column. If the grade...

I have dataset to predict how pass or fail based on score column. If the grade is higher than 90 we predict it pass if it below we predict it fall. the class column is the actual result so based on our prediction we got 10 correct answer out of 14. I want to do this I RStudio. To show how many corrected result we got based on the class. Score Our_prediction class 77.29597 Fail Fail 77.20041 Fail Fail 76.67481...

statistics students believe that the average score on the first statistics test is 65. A statistics...

statistics students believe that the average score on the first statistics test is 65. A statistics instructor thinks the average score is higher than 65. he samples ten statistics students and obtains the scores 65;65;70;67;66;63;63;68;72;7. he performs a hypothesis test using a 5% level of significance. the data are from a normal distribution. A) use these data to compare a 95% confidence interval for u. B) is there enough evidence to reject the claim? 4. it has been reported that...

Subjects