text: # Confidence Intervals for the Mean
  
  ## Confidence Interval on the Mean
  
  ### Questions
  
  Question 1 out of 5.
  You know the mean and standard deviation of the population. You take a sample from this population and compute the 90% confidence interval for the mean. This interval contains values that are within how many standard deviations of the mean?
  
  Question 2 out of 5.
  There is a population of test scores. You take a sample of 11 scores and use them to estimate the population mean and standard deviation. Then you compute a 95% confidence interval for the mean. This confidence interval contains values that are within how many standard deviations of its mean?
  
  Question 3 out of 5.
  You take a sample (N = 25) of test scores from a population. The sample mean is 38, and the population standard deviation is 6.5. What is the 95% confidence interval on the mean?
  
  (37.49, 38.51)
  
  (36.49, 39.51)
  
  (35.45, 40.55)
  
  (25.26, 50.74)
  
  Question 4 out of 5.
  You take a sample (N = 9) of heights of fifth graders. The sample mean was 49, and the sample standard deviation was 4. What is the 99% confidence interval on the mean?
  
  (39.76, 58.24)
  
  (44.53, 53.47)
  
  (45.93, 52.07)
  
  (47.51, 50.49)
  
  Question 5 out of 5.
  
  Based on the data below, what is the upper limit of the 95% confidence interval for the mean of A1? You may want to use the Analysis Lab or another statistical program to answer this.
  ________
  
  A1
  1
  4
  5
  5
  7
  9
  10
  11
  12
  13
  14
  14
  17
  19
  20
  23
  24
  24
  24 29