Statistics question

An experiment was conducted to see what percentage of rats would show empathy toward fellow rats in distress. Of the 300 total rats in the study, 230 showed empathy. Construct a 99% confidence interval estimate of the population proportion of rats that show empathy.
Is it a mean problem or proportion problem?
What is the population being considered here?
Will you use z distribution or t distribution?
What is critical value?
Sample statistic:
Go to http://www.lock5stat.com/StatKey > Bootstrap CI > CI for single proportion > “Edit data” >
Count = 230 and sample size = 300
Generate 1000 samples > check “Two Tails”
CI =
Interpretation:
Check whether the sample size is large enough.

In a simple random sample of 1219 US adults, 354 said that their favorite sport to watch is football. Construct a 95% confidence interval for the proportion of adults in the United States whose favorite sport to watch is football.
Is it a mean problem or proportion problem?
What is the population being considered here?
Will you use z distribution or t distribution?
What is critical value?
Sample statistic:
Go to http://www.lock5stat.com/StatKey > Bootstrap CI > CI for single proportion > “Edit data” >
Count = 354 and sample size = 1219 > generate 1000 samples > check “Two Tails”
CI =
Interpretation:
Check whether the sample size is large enough.

A Gallup poll conducted a random sample survey in 2005 asked 1006 Americans how many books did they read in the past year. Results of the survey indicated the mean to be 13.4 books, with a sample standard deviation of 16.6 books. Construct a 99% confidence interval and interpret it’s meaning.
Is it a mean problem or proportion problem?
What is the population being considered here?
Will you use z distribution or t distribution?
What is critical value?
Sample mean: , sample SD =
Margin of error =
CI =
Interpretation:
Check whether the sample size is large enough.

A random sample of 45 high school students has a skewed left distribution. The sample mean average ACT exam score was 20.8 with a sample standard deviation of 9.868. Statcato output of CI is given to you. Interpret the CI.
Sample size = CL =
Sample mean = Sample SD =
Margin of error = CI =
Interpretation:
Check whether the sample size is large enough.
SAMPLE ASSIGNMENT