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Assume that restaurant offers choice of 6 appetizers, 10 entrees, 6 desserts, and 8 beverages. Find out the number of possible meals if a diner intends to order two appetizers,
Suppose that male and female births are equally likely and that birth of any child doesn't affect the probability of gender of any other children. Find the probabilty of at least 6 boys in ten birth
Let A and B be mutually exclusive events stated on sample space S. Assume that P(A) = 0.4 and P(B) = 0.3. Determine the probability that A or B (possibly both) occurs?
If six reservations are made, determine the probability that at least one individual with a reservation cannot be accommodated on the trip? If six reservations are made, determine the expected number
The phone lines to airline reservation system are occupied 40% of the time. Assume that the events that the lines are occupied on successive calls are independent.
The times for each week student employs a lab computer are normally distributed, with mean of 6.6 hours and standard deviation of 1.4 hours. A student is randomly selected. Determine the following
A statistics professor receives and average of five e-mail messages for each day from students. Suppose the number of messages approximates the Poisson distribution. Determine the probability that o
Calculate the mean of the distribution of the sample means and the population mean. Compare the two values. What is true about the two values?
The output voltage of the certain electric circuit is specified to be 130. A sample of 40 independent readings on the voltage for this circuit gave a sample mean of 127 and a standard deviation of 7
A resewarch firm conducted survey to find out the mean amount people spend at popular coffee shop throughout a week. They found the amounts spen per week followed normal distribution with population
Calculate the mean of the distribution of the sample means and the poulation mean. Compare the two values. What is true about the two values?
As a part of its testing program, longlast tests sample of 144 batteries. What percentage of samples will have a mean useful life less than 68 months?
A manufacturer has two factories which make watches, A and B. Defective watches are made 1 out of 100 times in A, and 1 out of 200 times in B. A retailer gets a large box of watches shipped from one
Determine the formulas for the mean and the standard deviation for the distribution of sample means?
A population is estimated to have standard deviation of 20. We want to determine the population mean in 5, with 95% level of confidence. How large of sample is needed?
The american auto association reports mean price per gallon of regular gasoline is $2.10 with population standard deviation of $0.20. Suppose a random sample of 36 gasoline stations is chosen and th
After arriving at universtity students medical clinic, the waiting times to receive service after checking - in follow exponential distrivution with mean of 12 minutes. Compute the probability a stu
A statistics professor receives average of five email messages per day from students. Suppose the number of messages approximates a poisson distrivution.
The time to fly between new york city and chicago is basically distributed with mean of 180 minutes and standard deviation of 17 minutes. Determine the z-score that corresponds to a random vriable x
A lot of 50 components haves 5 defective components. One of the 50 components is drawn at random on Day 1 and it is employed in Assembly 1. A second component is drawn at random from remaining 49 co
Determine the probability that she receives at least 2 complaint calls in one day. Determine the expected number of complaint calls in one month (assume a month has 30 days).
A sample distribution (closely approximating normal distribution) of the critical part dimension has an average of 11.85 inches and a sample standard deviation of 1.33 inches. The lower specificatio
A prisoner is exiled to siberia or urals (a mountainious region in russia). The chance of being sent to siberia is 70%. The prisoner knows that a guard in siberia, given randomly selcted, has a prob
An envolope haves three cards: A black card which is black on both sides, a white card which is white on both sides and mixed card that is black on one side and white on other. You choose one card o
All switches function independently. The probability that the switch is operational is 0.7. Let P denote the Probability that system works.