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A random sample of forty-three 200 meter swims has a mean time of 3.27 minutes and a standard deviation of 0.07 minutes. Construct a 95% confidence interval for the population mean time.
The 95% confidence interval is ___ and ___.
Interpret results, choose an answere:
a. With a 95% confidence, it can be said that the sample mean time is between the endpoints of the given confidence interval
b. With a 95% confidence, it can be said that the population mean time is between the endpoints of the given confidence interval
c. With a 95% confidence, it can be said that the population mean time is not between the endpoints of the given confidence interval
Each time marksman i fires he hits the target,independently of the past, with probability P i,i=1,2,3. Determine the proportion of time, in the long run, that each marksman shoots.
The Nile Superstore is conducting a survey of consumer preferences for a new wireless, e-book reader. A sample of 160 people reveals that 120 would buy the new reader. Estimate the value of the population proportion.
Let"s redesign the Steak experiment so that in addition to 4 packaging methods, we have two storage temperatures -- Low, High. We have 16 steaks available. How do we randomly assign them?
A function sometimes associated with a continuous nonnegative random variable is the failure rate (or hazard rate) function which is defined as:
Use the relative frequency approach to construct a probability distribution and show that it satisfies the required condition. Find the expected value of the number of tests taken.
If the probability of making a two point shot is greater than the probability of making a three point shot, why do coaches allow some players to shoot the three point shot if they have the opportunity? Use expected value to explain your answer.
a goldfish is swimming at 2.00 cms toward the front wall of a rectangular aquarium. what is the apparent speed of the
You are looking at two used cars at a dealership. They are both the same year, make, model, color and price. You decide to ask the salesman which is more reliable.
The sample mean was $22,098 and the standard deviation was $6050. Is there evidence at the 1% significance level that the cost of attendance has increased?
according to divorce magazine.com infoplease and americans for divorce reform approximately 49 of all marriages in the
Doctors nationally believe that 68% of a certain type of operation are successful. In a particular hospital 47 of these operations were observed and 37 of them were successful. At a = 0.05 is this hospital's success rate different from the nationa..
What statistical test did the researchers use to determine if there was a statistically significant difference in levels of self-esteem between the boys and the girls?
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