About 72 of all female heart transplant patients will

Assignment Help Basic Statistics

Reference no: EM13637271

1. In a random sample of 24 people, the mean number of books they had read in the past year was 11.22 books and the standard deviation was 16.60 books. Assume the variable is normally distributed and use a t-distribution to construct a 95% confidence interval for the population mean . What is the margin of error of ?

(Round to nearest hundredth.)

2. A researcher wishes to estimate, with 95% confidence, the proportion of adults who have high-speed Internet access. Her estimate must be accurate within 1% of the true proportion,

a) Find the minimum sample size needed, using a prior study that found that 38% of the respondents said they have high-speed Internet access. (Round to nearest whole number.)

b) No preliminary estimate is available. Find the minimum sample size needed.

3. About 72% of all female heart transplant patients will survive for at least 3 years. 60 female heart transplant patients are randomly selected. What is the probability thst sample proportion surviving for at least 3 years will be less than 67%? Assume that the sampling distribution of sample proportions is a normal distribution.

Reference no: EM13637271

Questions Cloud

The average tenure of technicians at abc company is 10 : the average tenure of technicians at abc company is 10 years with a standard deviation of 5 years. calculate the

The mean salary for the clearing department at ameriprise : the mean salary for the clearing department at ameriprise financial is 42000.00 with a standard deviation of 8000.00.

Change the last number from 153 to 50 and recalculate the : compute a 95 confidence interval for the population mean based on the sample 1.5 1.54 1.55 1.51 0.09 0.08 1.55 0.07

The average math sat score is 517 with a standard deviation : the average math sat score is 517 with a standard deviation 119. a particular high school claims that its student have

About 72 of all female heart transplant patients will : 1. in a random sample of 24 people the mean number of books they had read in the past year was 11.22 books and the

The life span of a battery is normally distributed with a : 1. a survey was conducted to measure the height of ment. in the survey respondents were grouped by age. in the 20-29

Use the standard normal table to find the z-score that : 1. use the standard normal table to find the z-score that corresponds to the given percentile. if the area is not in

The access code for a cars security system consists of four : 1. suppose 60 of kids who visit a doctor have a fever and 20 of kids with a fever have sore throats. whats the

In a recent year scores on a standardized test for : 1. in a recent year scores on a standardized test for highschool students with a 3.50 to 4.00 gpa were normally

User Account

All Pages