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Determine the null and alternative hypotheses, (b), explain what it would mean to make a type I error and (c) explain what it would mean to make a type II error.
Determine the point estimate of the population, the margin of error for the following confidence interval, and the number of individuals in the sample with the specified characteristic, x, for the s
Find the sample proportion of people who had the Internet on their home computers. Find the 99% confidence interval for the population proportion of people who had the Internet on their home computers
At a Psychology final exam, the scores are normally distributed with a mean 73 points and a standard deviation of 10.6 points. The lower 5% of the class will not get a passing grade. Find the score
A field researcher is gathering data on the trunk diameters of mature pine and spruce trees in a certain area. The following are the results of his random sampling. Can he conc
The value for za/2 that will be used to calculate the 99% condidence interval is? Estimate the mean of return on all real estate investments with 99% confidence.
Independent probability based on two unrelated outcomes. Classical probability based on the ratio of the number of ways the event can occur. Relative frequency based on previous history
The Newton-Pepys problem: Assume the following problem only involves fair, six-sided dice. (a) Calculate the probability that, when rolling six dice, at least one "6" is rolled.
In a survey, respondents were asked to indicate their favorite brand of cereal (Post or Kellogg's). They were allowed only one choice. What is the probability concept that implies it is not possible
They have a steak dinner bet on next year's race, with Pat betting on the Red Sox and Tom on the Yankees. Both are convinced they will win. What probability assessment technique is being used by the
Micron Technology has sales offices located in four cities: Dallas, Seattle, Boston, and Los Angeles. An analysis of the company's accounts receivables reveals the number of overdue invoices by days
Find and attach a cross tabulation of data that is of interest to you. Write a question for the following along with the answer using your data:
In a survey, 42% of the repsondents stated they talk to their pets on the answering machine or telephone. A vet believed this result to be too high so she randomly selected 150 pet owners and disco
The Newton-Pepys problem: Assume the following problem only involves fair, six-sided dice. Calculate the probability that, when rolling six dice, at least one "6" is rolled.
A small company has 10 employees that receive a monthly paycheck and you calculate the mean and standard deviation for the paychecks in December. For the holiday, the president decides to give every
If a circle is drawn in the xy-plane with its center at the origin, what is the radius of the smallest circle that can be chosen in order for there to be probability 0.99 that the point (X, Y ) will
Determine if the variables are independent. Describe the characteristics of Binomial Distribution?
To win the game, a player must either spin a red or yellow and roll a 1 or 2 or spin a green or blue and roll a 5 or 6. What is the probability of winning the game?
A sociologist found that in a sample of 50 retired men, the average number of jobs they had during their lifetimes was 7.2. The population standard deviation is 2.1. Find the best point estimate of
A game has a spinner that is equally likely to land on any 1 of 4 colors: red, blue, yellow, or green. Determine the probability of spinning red 3 times in a row on 3 spins.
Twenty of the bike sales are selected and the selling prices are noted. The average selling price of this sample is $355. Describe the population under consideration and the population size?
When the background music was slow, the mean amount of bar purchases for a sample of 17 restaurant patrons was $30.47 with a standard deviation of $15.10.
If the number of patients seen per day is normally distributed, would an analysis of these sample data reject the hypothesis that the variance in the number of patients seen per day equal to 10? Use
The filling variance for boxes of cereal is designed to be .02 or less. a sample of 41 boxes of cereal shows a sample standard deviation of .16ounces. Use a=.05 to determine whether the variance in
Players A and B play a series of games that ends as soon as one side has won two more games than the other side. On each individual game, Player A wins with probability 0.6, independently of the out