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Finding probability for the given data using normal approximation
Use the normal distribution to approximate the desired probability.
A coin is tossed 20 times. A person, who claims to have extrasensory perception, is asked to predict the outcome of each flip in advance. She predicts correctly on 11 tosses. What is the probability of being correct 11 or more times by guessing? Does this probability seem to verify her claim?
a..0871, yes
b..4129, yes
c..0871, no
d..4129, no
(a) Write the fitted regression equation, (c) What is your conclusion about the slope.
If p is the probability of Event 1 and (1-p) is the probability of Event 2, based on the expected returns, for what values of p would you select A? B? C? Values in the table are payoffs.
Inspect table produced in question 2 above. Comment on relative sensitivity of minimum sample size to actual proportion and to desired half width.
Develop a scatter diagram for the data and write a brief summary.
How much evidence is there that the mean composite satisfaction rating exceeds 42?
The mean number of passengers per flight is 160 with a standard deviation of 20. The aircraft used for the route has 200 seats.
The management of a regional bus line thought its cost of gas might be correlated with its passenger/mile ratio. Comment on the data and correlation matrix below.
When carrying out a large sample test of H 0 : m =10 vs. H a : m ¹ 10 by using a p-value, we reject H 0 at level of significance α when the p-value is:
According to Bienayme-Chebyshev rule, what percentages of these funds are likely to be within ±2 standard deviation of mean?
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
Determine fraction of employees cost between $1,500 and $2,000 per year?
Then explain your answer to someone who has never had course in statistics (but who is familiar with mean, standard deviation, and Z scores.)
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