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In a survey, 200 people were asked to identify their major source of news information; 110 stated that their major source was television news.
(a) Construct a 95% confidence interval estimate for the proportion of people in the population who consider television their major source of news information. ______________
(b) How large a sample would be necessary to estimate the population proportion with a margin of error of 0.05 at 95% confidence? ____________
The mean amount purchased by a typical customer at Churchill\'s Grocery Store is $23.50 with a standard deviation of $5.00. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 50 customers, answer the foll..
Are you doubtful of any of these data points? if so why does there show to be a linear relation between degree of stenosis and nuber of reactive nuclei?
They wish to conduct a survey of their students and find a simple random sample of 50 Freshmen, 40 Sophomores, 35 Juniors, and 30 Seniors.
Forecast the number of deliveries utilizing exponential smoothing constant for different values also compare it. A hospital records the number of floral deliveries its patients receive every day.
Based on this information, confidence level would be 90% that population mean is somewhere between?
The number of customers at a specialty meat store averages about 1500/day. The exact number varies from day to day. On Fridays before long weekends, the number of customers increases to about 3000. Which of the following statements is correct
Create a 99% confidence interval estimate of population mean amount of paint included in a 1 gallon can.
Let X be the number of correct guesses by your friend in the 100 trials and Use the Normal approximation with the continuity correction - Which of the following might be reasonably modeled by the binomial distribution
Assume that the smiling time of eight-week old babies, in seconds, follows a uniform distribution between 0 and 23 seconds, inclusive. This means that any smiling time from 0 to and including 23 seconds is equally likely.
Compute the probability that student eats at fast food restaurant 2 or more times per week?
Internal study by Technology Services department at Lahey Electronics disclosed company employees get the average of 2 emails per hour. Suppose arrival of these emails is approximated by Poisson distribution.
Answer the following three questions based on what you know about statistics now.
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