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According to a report of the Nielsen company 65% of internet searches in may 2010 used the google search engine. Assume that sample of 20 searches is studied.
b) what is the probability that more than 16 of them used google?
c) what is the probability that between 15 and 18, inclusive used google?
You take a random sample of size 100 from a normal population with unknown mean but known standard deviation 40. You plan to test H(null): mu=85 versus H(alternative): mu > 85. Your procedure will be to observe the sample then reject H(null) is xbar>..
The number of completed entries made per hour
In recent years the irradiation of food to reduce bacteria and preserve the food longer has become more common. A company that performs this service has developed four dierent methods of irradiating food. To determine which is best, it conducts a..
On any given flight, an airline's goal is to fill the plane as much as possible without overbooking. If, on average, 10% of customers cancel their tickets, all independently of each other, what is the probability that a particular flight will be o..
Annual salary plus bonus data for chief executive officers are presented in the Business-Week Annual Pay Survey.
Suppose that you have 8 cards. 5 are green and 3 are yellow. The 5 green cards are numbered 1, 2, 3, 4, and 5. The 3 yellow cards are numbered 1, 2, and 3. The cards are well shuffled. You randomly draw one card.
Use these data to test the null hypothesis of no difference in the use of sick days between younger and older adults - What do your results indicate
A Gallup poll conducted during May 20 - 22, 2005, asked 1006 Americans, "During the past year, about how many books, either hardcover or paperback, did you read either all or part of the way through?" Results of the survey indicated that the me..
Mario, one of the owners of Mi Casa Front Porch Restaurant was looking to improve his planning for capacity. In order to do this, he wanted to understand the probability of people in each party coming to the restaurant. If the mean number of people p..
Descriptives of a continuous variable: mean, median, skewness, kurtosis, standard deviation and graph of that variable Cross tabulation of two variables
Given a normal distribution with µ =50 and σ =4, what is the probability that a. X > 43?b. X
what portion of variation in stock price percentage change is explained by the percent change in profit and what is the approximate predicted value for tips if the total bill is $100?
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