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Use the normal distribution of SAT critical reading scores for which the mean is 507 and the standard deviation is 121. Assume the variable x is normally distributed.
A) What percent of the SAT verbal scores are less than 675?
B) If 1000 SAT verbal scores are randomly selected about how many would you expect to be greater than 575?
Give the approximately the answers to each. Round to four decimal places as needed.
What type of shape would you expect the histogram of the sample size to have? What value would you estimate for the mean of the histogram of sample means?
Develop a 99% confidence interval for the population proportion.
Examine the two standard deviations. What do these indicate about the range of benefits enjoyed by the two groups?
In this paper present the Construction of confidence Intervals and the Proper Interpretation of confidence Intervals and show appropriate examples in the education environment.
A researcher conductued a study of the access speed of 35 hard drives and concluded that his maximum error of estimate was 35. If he were to conduct a second study to reduce the maximum error of estimate to 7, about how many hard drives should he ..
To develop 3-month and 2-month moving average for the time series.The following data represents demand for company ABC's products for the last 10 months.
An accounting firm has recently recruited six graduates: three men and three women. Three of the graduates are to be selected at random to work in the firms suburban office. Construct a probability tree.
The statistical research was done primarily through the internet from governmental regulated sources. Estimates were used in consideration of absence of actual information.
A customer from Cavallaro's Fruit Stand picks a sample of 5 oranges at random from a crate containing 80 oranges, of which 6 are rotten. What is the probability that the sample contains 1 or more rotten oranges? (Round your answer to three decimal..
Is there a difference in the number of points students earned on their educational statistics pretests and posttests?
Duracell Ltd claim that the life of their batteries in motorised soft toys is approximately normally distributed with a mean of 102.9 hours and a standard deviation of 16.5 hours.
If these are the only outcomes possible for the business venture, what is the chance that the business venture will be considered Highly Disappointing?
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