A state representative wishes to estimate the mean number of women representatives per state legislature. A random sample of 17 states is selected, and the number of women representatives is shown. Based on this sample, find the 90% confidence interval of the population mean.
4 32 33 34 24 27 15 48 25
18 39 21 58 130 31 19 16
A state representative wishes to estimate the mean number of women representatives per state legislature. A...
Mary wishes to estimate the mean height of women aged 18 to 24 . She picks a sample of 100 women aged between 18 and 24 and constructs a 99% confidence interval for the population mean. If she were to repeat this procedure 300 times in total, she would obtain 300 different confidence intervals. How many of these intervals would you expect to contain the population mean, mu? Explain your thinking.
The director of a hospital wishes to estimate the mean number of people who are admitted to the emergency room during a 24-hour period. The director randomly selects 64 different 24-hour periods and determines the number of admissions for each. For this sample, sample mean is 19.5 and standard deviation is 25. Estimate the mean number of admissions per 24 hours period with 90% confidence interval.
6) How many women must be randomly selected to estimate the mean weight of women in one age group. We want 90% confidence that the sample mean is within 3.4 lb of the population mean, and the population standard deviation is known to be 25 lb.
How many women must be randomly selected to estimate the mean weight of women in one age group. We want 90% confidence that the sample mean is within 2.31b of the population mean, and the population standard deviation is known to be 14 lb. 143 126 101 202
How many women must be randomly selected to estimate the mean weight of women in one age group. We want 90% confidence that the sample mean is within 2.1 lb of the population mean, and the population standard deviation is known to be 19 lb. 14) A) 445 B) 222 C) 278 D) 315
The director of a hospital wishes to estimate the mean number of people who are admitted to the emergency room during a 24-hour period. The director randomly selects 36 different 24-hour periods and determines the number of admissions for each. For this sample, sample mean = 16.2. It is known that the number of admissions follow a normal distribution with 0 =4. Estimate the mean number of admissions per 24-hour period with a 90% confidence interval O 16.2 + -...
A survey of 25 randomly selected customers found the ages shown (in years). The mean is 32.28 years and the standard deviation is 9.35 31 21 44 32 34 11 48 42 23 45 39 35 31 28 29 43 34 37 20 44 33 27 24 a) Construct a 80% confidence interval for the mean age of all customers, assuming that the assumptions and conditions for the confidence interval have been met. b) How large is the margin of...
A survey of 25 randomly selected customers found the ages shown? (in years). The mean is 33.16 years and the standard deviation is 9.21 years. 47 35 45 21 30 42 49 29 28 35 27 29 45 35 11 34 28 33 44 39 34 25 34 32 18 a) What is the 90% confidence interval for the mean age of all customers assuming that the assumptions and conditions for the confidence interval have been met? b) What is...
U Question 5 4 pts The director of a hospital wishes to estimate the mean number of people who are ditted to the emergency room during a 24-hour period. The director randomly selects 36 different 24-hour periods and determines the number of admissions for cach. For this sample, sample mean I 16.2. It is known that the number of missions follow a normal distribution with o-4. Estimate the mean number of admissions per 24-hour period with a 90% confidence interval....
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an estimate at the 90% level of confidence. For a sample of 1512 third graders, the mean words per minute read was 31.5. Assume a population standard deviation of 5.4. Construct the confidence interval for the mean number of words a third grader can read per minute. Round your answers to one decimal place.