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At the exit, the pressure and velocity are 1800 kPa and 619 m/s, respectively. Determine the area (m^2) at the exit of the nozzle if the mass flow rate is 1.85 kg/s.
A coffee shop owner wishes to test the null hypothesis: the average amount of time customers spend in her coffee shop is 45 minutes vs. the alternative hypothesis: the average amount of time custome
Find the value of the appropriate test statistic. Find the p-value. According to your answer to (b), does the wheel appear to be working properly? YES or NO. Explain briefly
A company produces component parts for an engine. What is the probability that more than 187 items will be non-defective in a given lot?
What is the difference between a population linear model and an estimated linear regression model?
It is known that the population standard deviation of weight among females is 15. Assuming that we have a random sample of 136, what is the standard error of the average weight among women of a samp
What combination of A and B will maximize profit? Show your work using graphical linear programming solution
Is there a statistically significant difference in the proportions of women delivering preterm among the three treatment groups? Run the test at a 5% level of significance.
Using probability: How can you use probability to improve your chances of winning at a casino. Provide specific examples using concepts learned in this module.
Computer the probability that the bridge will be overtopped exactly once during the next ten years. Compute the probability that the bridge will be overtopped in two of the next 50 years
The number of customers arriving per hour at a certain automobile service facility is assumed to follow a Poisson distribution with a mean of 5.6 customers per hour. What is the probability that the
Find the 99% confidence interval of the mean number of jobs? To estimate the true mean within 1/2 job with 99% confidence, how large of a sample is needed?
A study of internet usage indicated a month average of 36 internet sessions per user from home. A random sample of 24 teenages yielded a mean of 42.1 sessions with a standard deviation of 5.3. (a=.
Suppose he attempts 20 3-point goals for the first 4 games of next year. What is the mean number of shots that he will make? What is the standard deviation in te number of shots he will make? What i
Determine the correlation coefficient, the t-value and p-value for a linear regression t-test. State the null hypothesis, accept or reject, summarize the results.
Do an appropriate hypothesis test to determine the proportions of colors differ from the general population. State the null hypothesis and accept or reject. Summarize the rsults.
Find the variance and standard deviation of this data set: 20, 29, 25, 25, 22, 11, 16, 24 (show work)
If X has a normal probability distribution what is the population mean and standard deviation. How musch would the estimate need to be changed so that there is a 50% chance of an overrun.
Suppose according to a 1990 demographic report the average U.S. household spends $90 per day. Suppose you recently took a sample of 30 households in Huntsille and the results revealed a mean of $84.
The average magnesium concentration in ground water around Metro City is u=65.6 parts per million(ppm) with a standard deviation of o=10. The table below shows the ground-water magnesium concentrati
Breaking strength (in kg) of the front part of a new vehicle is normally distributed. In 10 trials the breaking strengths were found to be 578, 572, 570, 568, 572, 570, 570, 572, 596, 584. Find a 95
Lengths of pins (in mm) produced by a machine follow a N (mu, sigma 2) distribution. Find the maximum likelihood estimators of mu and sigma 2 based on a random sample of size 10 with observations:
The combined weights of passengers and their luggage (in kg) are uniformly distributed on the interval (a, b). The weights observed for a random sample of 9 passengers were: 90, 135, 120, 127, 115,
Assuming that intakes at different meals arc independent of one another, what is the approximate probability that the average calorie intake per day over the next year (365 days) is at most 3410?