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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
Find the expected number of games that you play. Find the expected number of games that you lose.
There are 10 employees in a particular division of a company. Their salaries have a mean of $80,000, a median of $60,000, and a standard deviation of $22,000. The largest number on the list is $100
At one time, the cholesterol levels for women aged 20 to 34 follow an approximately normal distribution mean 185 milligrams per deciliter (mg/dl) and standard deviation 39 mg/dl. What proportion of
The lifetimes (in years) of a certain kind of electronic component is a random variable having probability density function
We have a system consisting of four components. Each component functions or fails, each independently of the others. The entire system functions if A and B function, along with at least one of C or
The time to failure of a battery in hours of a personal handheld music device follows an exponential distribution. The expected battery life is 2000 hours.
A survey of 50 randomly selected people found the following blood types. createa the bar chart that best displays the relative frequencies.
The table below shows the price of a volatile stock from the months January 1999 through December 1999 as determined by the closing price on the last trading day of the month. The price is rounded t
A professional tennis player hit 100 balls, and their speeds were recorded. The results are shown in the frequency distribution above. Using the information, construct a cumulative frequency table f
Concepts and applications. Find the Range and Standard Deviation
Describing Distribution the reaction times of 500 randomly selected drivers, measured under standard conditions. a. How many modes would you expect for the distribution?
Create a hypothetical one hundred thousand table illustrating this situation, where the row categories are disease (yes, no) and the column categories are test results (positive, negative).