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Express Courier Service has found that the delivery time for packages is normally distributed, with mean 13 hours and standard deviation 2 hours.
a) For a package selected at random, what is the probability that it will be delivered in 18 hours or less? (Round your answer to four decimal places.)
b) What should be the guaranteed delivery time on all packages in order to be 90% sure that the package will be delivered before this time? (Hint: Note that 10% of the packages will be delivered at a time beyond the guaranteed time period.) (Round your answer to one decimal place.)
A market researcher wants to find the 99% Confidence Interval for the average number of hours people spend online each day.
Design a digital Chebyshev-II filter and determine the coefficients of the impulse response h(n) of the FIR filter and Determine the Z-transforms and sketch the ROC
The calculated chi-square test statistic and the table value for a 0.05 significance level are:
A randomized block design with 4 treatments and 5 blocks produced the following sum of squares values: SST = 1951, SSTR = 349, SSE = 188. The value of SSB must be:
A student analyze 5,000 RFUs in a 200ul aliquot from a G3-500 ml culture. How many total RFUs will be present in a G3-15ml sample? During rGFP purification in lab#4.
When the effect of a level for one factor depends on which level of the other factor is present, use: Select one:
Plasma membrane with surface area of 5000 µm2; there are 106 phospholipid molecules per µm2 in each leaflet of the membrane; there are 3000 molecules of flippase enzyme associated with plasma membrane.
If the test is positive, what is the probability that this person actually has heart disease?
A financial planner wants to compare the yield of income and growth mutual funds. Fifty thousand dollars is invested in each of a sample of 35 income and 40 growth funds
Explain the structure of a flagellum and how it operates and what are the four main types of flagellar arrangement?
Bougainvilleas, mean growth rate was 2.23 inches/week and sample standard deviation was 0.77 inches/week. Determine a 90% confidence interval for mean growth rate of all Bougainvilleas.
At the .05 level of significance, can we conclude that those joining Weight Reducers on average will lose less than 10 pounds? Determine the p -value.
Why is a normal distribution called "normal"? Investigate the answer to this question on the internet and share the answer in your own words. Be sure to cite your sources.
Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks? Justify your answer.
Do you think that all random samples taken from the same population will lead to the same result?
Does this result support original claim, or is population percentage considerably less than 45%. Use alpha=.05 for level of significance.
A survey of the number of calls received by a sample of Southern Phone Company subscribers last week revealed the following information.
Compute cumulative probabilities for these numbers in second column. Then create a histogram illustrating data distribution. Using generated Normal probability table, determine probability of Pr(X
I tossed a coin 6 times and recorded the outcomes - H for heads and T for tails. The first set of tosses yielded HTHTTH and the second set of tosses yielded TTTHHH. Which set of tosses is more probable to happen? And why?
Critical Thinking: Discuss the implications of: magnitude (from 0 to 1); sign ( + or -); and probability versus causality for the Correlation Coefficient (also known as the Pearson Product-Moment Correlation Coefficient).
A manufacturing process makes items whose weights are normally distributed. It is known that 22.57% of all the items made weigh between 100 grams up to mean and 49.18% weigh from the mean up to 190 grams. Find out the standard deviation.
Probability using discrete distribution.The probability distribution for the random variable x follows.
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