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In "Boston Record Game Fishes", it is stated that in the Cozumel region, approximately 40% of strikes (while trolling) result in a catch. Suppose that on a given day a fleet of fishing boats got a t
The National Study of the Changing Workforce conducted an extensive survey of 2958 wage and salaried workers on issues ranging from relationships with their bosses to household chores.
You are dealt a hand of three cards from a standard deck of cards, one at a time. What is the probability that the first red card you get is the third card dealt? Show how and provide the answer to
Permutations with objects together: How many ways can the words be rearranged in ALLABABA with BABA together? Permutations with objects NOT together: How many ways can the word be rearranged in CRESPI
There are 7 guards and 6 centers trying out for the starting 5 in a basketball team with specific positions. Find the number of ways to select the starting 5 and put them into their positions.
If a confidence interval for the difference between a pair of treatment means includes 0, then we fail to reject the null hypothesis that there is no difference in the pair of treatment means.
Three experiments delving into the relationship between the neccecisity for cognitive closure and persuasion were reported in "Motivated Resistance and Openess to Persuasion in the Presence or Absen
The Wind Mountain archaeological site is located in soutwestern New Mexico. Wind Mountain was home to a culture of prehistoric Native Americans called Anasazi. A random sample of excavations at Wind
In "Boston Record Game Fishes", it is stated that in the Cozumel region, approximately 40% of strikes (while trolling) result in a catch. Suppose that on a given day a fleet of fishing boats got a
Which of the following is NOT a difference between a confidence interval and a prediction interval?
When the null hypothesis for an ANOVA analysis comparing four treatment means, is rejected,
In a recent study of 35 ninth-grade students, the mean number of hours per week that they played video games was 16.6. The population standard deviation was 120 mins. Find the value of the best poin
A random variable Y has unknown mean µ and standard deviation 20. What is the sample size n needed so that the 99% margin of sampling error is 5?
A mail order company has an 8% success rate. If it mails advertisements to 600 people, find the probability of getting less than 40 sales?
A normally distributed random variable Y has std dev. = 800. A random sample of 100 observations was taken from Y, and the sample average observed was 1400. Find the right endpoint of the symmetric
Construct a 96% confidence interval for the true mean breaking strength of a certain type of 10 ft. long cables. Assume that there are 100 such cables with mean X ? = 457 lbs while the standard devi
In a grinding operation, there is an upper specification of 3.150 in. on a dimension of a certain part after grinding. Suppose that the standard deviation of this normally distributed dimension is ?
Now suppose the standard deviation is 1.5 ounces. Determine the average number of ounces the machine should dispense so that no more than 2.5% of the bottles contain less than 19.5 ounces.
According to the IRS, the average tax refund for the 70 million personal income tax returns in 1998 was $800. Assuming a standard deviation of $220, find the probability that for a random sample of
By showing work with mean and sample standard deviation, verify that x bar is approximately equal to 74.2 cm and s is about 18.3 cm.
Find solutions to the following problem. Be sure to include all relevant information, including hypothesis, critical value, degrees of freedom, and a statement about significance.
The distribution of weights can be approximately normal with mean 90 grams and a standard deviation of 1 gram. What percentage of items will either weigh less than 87 grams or more than 93 grams?
A large national bank charges local companies for using their services. A bank official reported the results of a regression analysis designed to predict the bank's charges (y), measured in dollars
How large of a sample is needed if we wish to be 95% confident that the sample percentage of those equating success with personal satisfaction is within 1% of the poulation percentage?