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company produces packets of soap powder labeled "Giant Size 32 Ounces." The actual weight of soap powder in a box has a normal distribution with a mean of 33 oz. and a standard deviation of 0.8 oz. What proportion of packets are underweight (i.e., weigh less than 32 oz.)?
what percent of the total number of seeds germinated?
When no natural gas is present the test is accurate 90% of the time. Find the best set of decision for the landowner to maximize her profit.
Utilize this information to construct a probability table, and then calculate each of the given probabilities:P (female and domestic car).
A random sample of 80 observations from a normally distributed population produced a mean x(bar over the x)= 22.6 . Find a 95% confidence interval for the population mean m if the population standard deviation
A law student, who want to check a professor's claim that convicted embezzlers spend on average 12.3 months in jail, takes a random sample of 36 such cases from court files.
Using a 1% level of significance, can we say that there is a difference in the average waiting time between the two shops? Find the critical value(s).
Use mathematical induction to prove that : 1*2+2*3+3*4+....+n(n+1)(n+2)/3 for all n >_1 and (2) Find d=gcd (721 , 448), find integers s and t with d=721s + 448t, and put the fraction 448/721 in lowest terms.
The time (in hours) until failure of a transistor is a random variable X which is exponentially distributed with mean = 50. It is observed that after 40 hours the transistor is still working. Find the conditional probability that X > 65.
Use the normal approximation to estimate the probability of at least one disaster in 25 missions.
Computing a linear regression equation to predict the future values of the dependent variable Y - Linear relationships into a single multiple regression.
Employees of a local company are classified according to gender and job type. The following table summarizes the number of people in each job category.
Each scenario involves randomly selecting n i observations from four, independent, Normal populations as described.
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