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A government agency has specialists who analyze the frequencies of letters of the alphabet in an attempt to decipher intercepted messages. In standard English text, a particular letter is used at a rate of 6.9%.
a. Find the mean and standard deviation for the number of times this letter will be found on a typical page of 2900 characters.
b. In an intercepted message, a page of 2900 characters is found to have the letter occuring 234 times. Is this unusual?
What is the basic principle that can be used to simplify a polynomial? What is the relevance of the order of operations in simplifying a polynomial?
A marketing survey is conducting in which students are to taste two different brands of soft drink. Their task is to currently identify the brand tasted.
A coin-operated coffee vending machine dispenses, on the average, 6 oz of coffee per cup. Can this statement be true of a vending machine that occasionally dispenses only enough to fill the cup half full (say, 4 oz)?
Why might supposition of normal population be doubtful? Problem arises when?
What is the probability that there will be more than 6 accidents in a 1-hour period? What is the probability that there will be at most 2 accidents during the 2-hour busy period on a particular day?
For each sample, carry out a Z test using the five steps hypothesis testing with a two-tailed test at the .05 significance level, and make a drawing of the distributions involved.
What is the effect of child care on the security of attachment which develops between infant and caregiver. You suspect that infants in child care will be insecurely attached at 11 months after being in a child care from 2 months of age,
How many participants would be required to ensure that a 95% confidence interval for the mean difference in the number of drinks is within two drinks of the true mean? Assumed that the standard deviation of the difference in the mean number of dri..
High levels of glucose in the blood are indications of diabetes, which is becoming more prevalent in the United States. Diabetes can lead to many complications such as blindness and heart disease. A random sample of 180 individuals had their blood su..
What is the probability that the mean contents of a six-pack are less than 12 ounces and what is the chance I find at most two defectives in the sample
Conduct the hypothesis test and compute the p-value. At a 0.05 level of significance, what is your conclusion?
In 1998, as the advertising campaign, Nabisco Company announceda "1000 Chips Challenge," claiming. Develop the 95% confidence interval for average number of chipsin bags of Chips Ahoy cookies.
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