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According to census bureau, 68% of Americans owned their own homes in 2003. A local real estate office desires to see if this is the case in their area. They choose a random sample of 200 people to
The unemployment rate of persons with the disability is typically higher than for those without disability. Recent stats report that this rate is 14.5%. An advocacy group in large city chosen a rand
A small business ships candy to anywhere in world. Past records point to that orders weigh an average of 118 grams with standard deviation of of 14 grams. Assume a random sample of 50 orders is sele
At the local manufacturing plant, employees should compolete new machine set ups in 30 minutes. New machine set up times can be stated by a normal model with mean of 22 minutes and standard deviatio
Find the mean, variance and standard deviation for the following probability distribution:
In transmission of digital information probability that a bit has high, moderate, or low distortion is 0.01, 0.04, and 0.95, respectively. Assume that three bits are transmitted and that amount of d
Determine the approximate probability of obtaining at least 50 red-blossomed plants when 80 plants are grown from seeds?
Assume that the amount of time student needs to answer each of the questions on exam are independent exponential random variables, and the expected amount of time required to answer a single questio
Employ the five-step hypothesis-testing procedure in solving the following: The GfK Custom Research America, formerly known as the Roper Organization, conducted identical surveys five years
Reis, Inc., a New York real estate research firm, tracks cost of apartment rentals in United States. In mid-2002, the nationwide mean apartment rental rate was $895 per month (The Wall Street Journa
Assume you're hired as a forensic accountant by the owner of this small business, what statistical test would you employ to find out if there is fraud committed in the issuing of checks?
How do you calculate the standard deviation in a paired sample t test? If the sd for group one is 6.04 and the sd for group 2 is 6.47 what is the formula for calculating the standard deviation to us
The cost of desired model is $1200 per processor and discount of 50 X2 dollars is credited towards any purchase. There is also a fixed cost of $600 regardless of number of processors purchased. How
A study is conducted to determine if adults over 50 years old with higher total cholesterol levels are more hostile than those with lower cholesterol levels. A group of 100 adults is randomly select
An instructor is interested in knowing if his students are different from the general population in their degree of dysfunctional attitudes.
A bridge deck has 52 cards with 13 cards in each of four suits: spades, hearts, diamonds, and clubs. A hand of 13 cards is dealt from shuffled deck. Find the probability that the hand has:
show that the expected value of your winnings does not exist (i.e., is given by a divergent sum) for this game. Does this mean that this game is favorable no matter how much you pay to play it?
Yˆ = 5.0 + .30X1 Where the dependent variable equals turnover intentions for line managers and the independent variable equals number of employees supervised.
A survey was conducted of age in years of 50 randomly selected customers. The mean was 27.47 years with the standard deviation of 10.69 years. About how large would the sample size have to be to cut
Assume that the percentage of sampled listeners giving Used To Love U by John Legend the ratings 5, 4, 3, 2, 1, and UNFAM are, respectively, 18 percent, 27 percent, 28 percent, 8 percent, 10 percent
To evaluate a particular Metlar scale, an item whose weight is known to be 16.01 ounces is weighted five times by the same operator. The measurements (in ounces) are saved in the METLAR file and fol
In a group lineup of 7 models in a commercial, 3 are male and 4 are female. In how many ways can you arrange 3 models in a lineup if the first and the third must be a male but the second one must be
Explain why -0.41 cannot be the probability of some event.
If you were using the relative frequency of an event to estimate the probability of the event, would it be better to use 100 trials or 500 trials? Explain.
Compute the mean and standard deviation of Ybar and using CLT, what is the probaility that the sample mean based upon 50 observations will determine the true mea of 8 in a margin of error of +-2.