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If a normal distribution has the mean of 48 with standard deviation of 6, what X value is the lower boundary of top 60% of distribution?
A quality-control technician must select a sample of 10 dresses from a production lot of 74 couture dresses. How many different samples are possible? Express your answer in terms of factorials.
Discuss the sample space of drawing a marble from a sack of 3 blue and 7 red marbles. Discuss the sample space of three consecutive coin tosses. Let T represent a toss of heads and H a toss of tails.
A light bulb has the normally distributed light output with mean of 3,000 foot-candles and standard deviation of 50 foot-candles. Find out a lower specification limit such that 0.5% of the bulbs wil
The following data was collected to find out whether or not Nassau Community College students work 18 hours per week:
The following sample data have been collected for purpose of testing whether population standard deviation is equal to 40. Conduct the appropriate hypothesis test using α = 0.05
Assume a shipment was sent to this customer and when the customer inspected two sheets at random, 10 plugged defects were counted. Determine the probability of observing 10 or more plugged defects i
The farmhill nursery sells trees as well as other yard and garden items. Currently, the nursery has 10 fruit trees, 8 pine trees, and 14 maple trees. It plans to give four trees away at next saturda
Compute the standard deviation for the 50 season ticket-holders.
Make a model that would aid the company determine if it is possible to raise the dollar holdings (above the initial $5 million) by circulating currencies through the currency market.
There are two routes by bus to mall. The first route is shorter, but the ride encounters heavy traffic sometimes. The travel time for first route is approximately normal with mean 50 and variance 10
Determine the numerical value of Z? Determine the estimated value of s? Determine the value of E (Margin of error)?
Develop a confidence interval for µd, the mean of differences d for population of paired data. Suppose that the population of paired differences is normally distributed.
An airline finds out that 5% of the persons wo make reservations on certain flight don't show up for that flight. If the airline sells 160 tickets for flight with only 155 seats, determine the proba
You are appointed by Coca Cola to find out the mean number of ounces of Coke that is going in each can. You take a random sample of 100 cans and precisely measure how much each contains. The mean am
A fund raising committee is to be selected from a group of 30 members, including 20 college graduates (15 of whom are women) and 10 people who did not graduate from college (4 of whom are women).
What is the value of the t score for a 99% confidence interval if we take a sample of size 20?
Minute Maid states that bottle of juice contains 473 mL. Consumer groups are interested in estimating if the bottles contain less than the amount stated on label. To test their claim, they sample 30
One of assumptions we sometimes need to make when performing statistical inferences is that the response variable in population has a Normal distribution. Is it possible to check that this assumptio
The price of stock is uniformly distributed between $30 and $40. Determine the probability that the stock price will be more than $37?
What is the point estimate of the proportion of people who prefer going to a shopping mall in their spare time? At 95% confidence, what is the margin of error associated with this estimate?
Where in everyday life do you notice which you make decisions based upon averages? On a popular outcome that is not the average? On the chance that something will occur? On the chance that something
Determine the critical value of z? Report the critical value CLOSEST to your calculated z-score. (Answer to 2 decimal places.)
Michelle employed a sample of 50 U.S. cities to determine the relationship between crime, or annual property crimes per 100,000 persons, and income, or median income per capita.
A production procedure is checked periodically by a quality control inspector. The inspector selects simple random samples of 30 finished products and computes the sample mean product weights (line