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An article states that false-positives in polygraph tests (tests in which an individual fails even though he or she is telling the truth) are relatively common and occur about 10% of the time. Suppose that such a test is given to 10 trustworthy individuals. (Round all answers to four decimal places.) What is the probability that all 10 pass?
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9 months ago
Emergency 911 calls to a small municipality in Idaho come in at the rate of one every two minutes. Assume that the number of 911 calls is a random variable that can be described by the Poisson distribution. (a) What is the expected number of 911 calls in one hour? per hour (b) What is the probability of three 911 calls in five minutes? If required, round your answer to four decimal places. (c) What is the probability of no 911 calls during a five-minute period? If required, round your answer to four decimal places.
General
9 months ago
Suppose you have a sample of size 42 with a mean of 30 and a population standard deviation of 7.4. What is the maximal margin of error associated with a 95% confidence interval for the true population mean? As in the reading, in your calculations, use z = 2. Give your answer as a decimal, to two places
General
9 months ago
According to a study conducted by an organization, the proportion of Americans who were afraid to fly in 2006 was 0.10. A random sample of 1,300 Americans results in 143 indicating that they are afraid to fly. Explain why this is not necessarily evidence that the proportion of Americans who are afraid to fly has increased. Select the correct choice below and. if necessary, fill in the answer box to complete your choice. This is not necessarily evidence that the proportion of Americans who are afraid to fly has increased above 0.10 because the probability of obtaining a value equal to or more extreme than the sample proportion is . which is not unusual.
General
9 months ago
The amount of energy it takes to lift a box might be a function of which of thefollowing?
General
9 months ago
Which of the following is a rate? 24 apples for $3 12 apples for $1.50 8 apples for $1 16 apples for $2
General
9 months ago
WILL MARK BRAINLIEST AND 20 POINTS!!Which linear function has the steepest slope?y= -8x+5y-9= -2(x+1)y=7x -3y+2=6(x+10)
General
9 months ago
A quality inspector must verify whether a machine that packages snack foods is working correctly. The inspector will randomly select a sample of packages and weigh the amount of snack food in each. Assume that the weights of food in packages filled by this machine have a standard deviation of 0.30 ounce. An estimate of the mean amount of snack food in each package must be reported with 99.6% confidence and a margin of error of no more than 0.12 ounces. What would be the minimum sample size for the number of packages the inspector must select?
General
9 months ago
Sketch the domain D bounded by y = x^2, y = (1/2)x^2, and y=6x. Use a change of variables with the map x = uv, y = u^2 (for u ? 0) to calculate Double integral Dy^ - 1dx dy. This is an improper integral since f(x, y) = y^ - 1 is undefined at (0, 0), but it becomes proper after changing variables.
General
9 months ago
There are 39 students in a psychology class. The class has been divided into 10 groups; 9 groups have 4 students in them, 1 group only has 3 students. The instructor puts all of the students names in a hat and then randomly draws 1 name. What are the chances that the one name will be the name of someone in the small, 3-person group?
General
9 months ago
Your portfolio consists of two assets: $10,500 of Intel's corporate bonds and $15,700 of Microsoft stock. The standard deviations of returns for Intel's bonds and Microsoft stock are 12% and 27%, respectively. The correlation between these two investments is 0.33. What is the standard deviation of your portfolio?
General
9 months ago
trigonometry problem
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9 months ago
You are applying for an 80/20 mortgage to buy a house costing $175,000.The first (80%) mortgage has an interest rate of 4.75%, and the second (20%)mortgage has an interest rate of 7.525%. Both the first mortgage and thesecond mortgage are 30-year fixed-rate mortgages. What will the totalamount of the mortgage be?
General
9 months ago
The function f(x) has been transformed to give g(x). Which of the following functions represent g(x)A. g(x) = (1/2) x^2B. g(x) = 4x^2C. g(x) = 1/4 x^2D. g(x) = 2x^2f(x) = x2g(x) = ?
General
9 months ago
Trainees must complete a specific task in less than 2 minutes. Consider the probability density function below for the time it takes a trainee to complete the task.f(x) = 0.85 - 0.35x0 < x < 2a) What is the probability a trainee will complete the task in less than 1.31 minutes? Give your answer to four decimal places.b) What is the probability that a trainee will complete the task in more than 1.31 minutes? Give your answer to four decimal places.c) What is the probability it will take a trainee between 0.25 minutes and 1.31 minutes to complete the task? Give your answer to four decimal places.d) What is the expected time it will take a trainee to complete the task? Give your answer to four decimal places.e) If X represents the time it takes to complete the task, what is E(X2)? Give your answer to four decimal places.f) If X represents the time it takes to complete the task, what is Var(X)? Give your answer to four decimal places.
General
9 months ago
Ashley is making lemonade. The recipe she is using calls for $\frac{3}{4}$ cup of water. Ashley wants to make five times the amount of lemonade that the recipe calls for. She mistakenly uses $4$ cups of water. If $x$ is the number of cups of water Ashley is supposed to use and $y$ is the number of cups of water she actually uses, what is $x-y$? Express your answer as a decimal.
General
9 months ago
From where the shoes spilled (48Â°N, 161Â°W) to where they were found on May 22nd 1996 (54Â°N, 133Â°W), how many kilometers did they travel? How many days did they take to travel that distance (use April 30 as the date found)? What was their rate of travel in kilometers per hour?
General
9 months ago
Suppose that 7 female and 5 male applicants have been successfully screened for 5 positions. If the 5 positions are filled at random from the 12 finalists, what is the probability of selectinga. 3 females and 2 males?b. 4 females and 1 male?c. 5 females?d. at least 4 females?
General
9 months ago
which of the following is important to remember when writing a job object? select all that apply
General
9 months ago
Please Help Identify each angle pair. Choose from the list below. Corresponding, Alternate Interior, Alternate Exterior, Same-side Interior, Linear Pair, Vertical ∠1 and ∠6: ∠1 and ∠3: ∠3 and ∠6: ∠4 and ∠8: ∠4 and ∠5: ∠5 and ∠6:
General
9 months ago
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