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MATH SOLVE
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In an article about the cost of health care, USA Today reported that a visit to a hospital emergency room has a mean cost of $1400 in 2017. Assume that the cost for the hospital emergency room visit is normally distributed with a standard deviation of $392. Answer the following questions about the cost of a hospital emergency room visit for this medical service. What is the probability that the cost will be more than $1000?
General
3 months ago
The populations and areas of four states are shown. A 3-column table has 4 rows. The first column has entries State A, State B, State C, State D. The second column is labeled Population with entries 1,055,173, 1,333,089, 3,596,677, 6,745,408. The third column is labeled Area (kilometers squared) with entries 2,677, 36,418, 5,543, 10,555. Which statement regarding these four states is true? The state with the lowest population has the greatest population density. The state with the second lowest population has the lowest population density. The state with the lowest population has the lowest population density. The state with the second greatest population has the lowest population density.
General
3 months ago
A motorist traveling with a constant speed of 15m/s passes a school-crossing corner, where the speed limit is 10m/s. Just as the motorist passes, a police officer on a motorcycle at the corner starts off in pursuit with constant acceleration of 3m/s^2. (a)How much time elapses before the police catches up the motorist? (b)What is the officer's speed limit at that point? (c)What is the total distance each vehicle has traveled at that point?
General
3 months ago
A florist determines the probabilities for the number of flower arrangements they deliver each day.x 19 20 21 22 23P(x) 0.21 0.22 0.30 0.15 0.12Mean = Find the mean, variance, and standard deviation of the distribution rounded to 4 decimal places.Variance =Standard Deviation =Approximately how many arrangements should the florist expect to deliver each week, rounded to the nearest whole number?
General
3 months ago
The school cafeteria serves tacos every six days and cheeseburgers every eight days tacos and cheeseburgers on today's menu how many days it be before they are both menu again
General
3 months ago
33 The length of a side of a rhombus is 241m. The length of its height is 120m. Find the measures of its angles.
General
3 months ago
On December 25, 2009, an airline passenger was subdued while attempting to blow up a Northwest Airlines flight headed for Detroit, Michigan. The passenger has smuggled explosives hidden in his underwear past a metal detector at an airport screening facility. As a result, the Transportation Security Administration (TSA) proposed installing full-body scanners to replace the metal detectors at the nation’s largest airports. This proposal resulted in strong objections from privacy advocates who considered the scanners an invasion of privacy. On January 5–6, 2010, USA Today conducted a poll of 542 adults to learn what proportion of airline travelers approved of using full-body scanners (USA Today, January 11,2010). The pol results showed that 455 of the respondents felt that full-body scanners would improve airline security and 423 indicated that they approved of using the devices. A) Conduct a hypothesis test to determine if the results of the poll justify concluding that over 80% of airline travelers feel that the use of full-body scanners will improve airline security. Use α = .05 B) Suppose the TSA will go forward with the installation and mandatory use of full-body scanners if over 75% of airline travelers approve of using the devices. You have been told to conduct a statistical analysis using the poll results to determine if the TSA should go forward with mandatory use of the full-body scanners. Because this is viewed as a very sensitive decision, use α = .01. What is your recommendation?
General
3 months ago
Suppose you are working with a data set that is normally distributed, with a mean of 300 and a standard deviation of 47. Determine the value of x from the following information. (Round your answers and z values to 2 decimal places.) (a) 80% of the values are greater than x. (b) x is less than 14% of the values. (c) 23% of the values are less than x. (d) x is greater than 52% of the values
General
3 months ago
In a certain year, the difference between Mary’s and Jim’s annual salaries was twice the difference between Mary’s and Kate’s annual salaries. If Mary’s annual salary was the highest of the 3 people, what was the average (arithmetic mean) annual salary of the 3 people that year?
General
3 months ago
A researcher used a sample of n = 60 individuals to determine whether there are any preferences among four brands of pizza. Each individual tastes all four brands and selects his/her favorite. If the data are evaluated with a chi-square test for goodness of fit using α = .05, then how large does the chi-square statistic need to be to reject the null hypothesis?
General
3 months ago
Bryan wants to purchase a skateboard. He has $50 to spend. he finds one that regularly sells for $70.00 and is on sale for 40% off. Sales tax is 7%. Bryan says he has enough money to buy the skateboard. is he correct?
General
3 months ago
It takes 60 minutes to make 2000 copies on an old copy machine. The newer copier works with the old copier to create 2000 sheets and it only takes 15 minutes. How many minutes would the new copier need to create the 2000 copies on its own?
General
3 months ago
Which of the following is a zero does the function f (x) =(x+3) (x-7) (x+5)X=-7X=-3X=3X=5
General
3 months ago
I’m so bad at slope
General
3 months ago
Find all numbers c that satisfy the conclusion of the Mean Value Theorem for the following function and interval. Enter the values in increasing order and enter N in any blanks you don't need to use. f(x)=24x2+16x+7[−11]
General
3 months ago
Suppose that a magnet high school includes grades 11 and 12, with half of the students in each grade. 60% of the senior class and 10% of the junior class are taking calculus. Suppose a calculus student is randomly selected to accompany the math teachers to a conference. What is the probability that the student is a junior? (Enter your answer as a fraction.)
General
3 months ago
A fair coin is tossed three times and the events A, B, and C are defined as follows: A:{ At least one head is observed } B:{ At least two heads are observed } C:{ The number of heads observed is odd } Find the following probabilities by summing the probabilities of the appropriate sample points (note that 0 is an even number): (a) P(B) =(b) P(A or B) = (c) P(A or B or C)
General
3 months ago
An article reports that in a sample of 413 male college students, the average number of energy drinks consumed per month was 2.48 with a standard deviation of 4.87, and in a sample of 382 female college students, the average was 1.22 with a standard deviation of 3.23. Can you conclude that the mean number of energy drinks is greater for male students than for female students? Find the P-value and state a conclusion.
General
3 months ago
Since an instant replay system for tennis was introduced at a majorâ tournament, men challenged 1399 refereeâ calls, with the result that 411 of the calls were overturned. Women challenged 759 refereeâ calls, and 211of the calls were overturned. Use a 0.01 significance level to test the claim that men and women have equal success in challenging calls.H0:p1=p2H1:p1 (does not equal) p2Identify the test statistic z=___
General
3 months ago
How many pounds of ground beef are needed to make 80 hamburger patties if each uncooked patty weighs 4.8 ounces?A 10.4 poundsB 24 poundsC 61.4 poundsD 96 pounds
General
3 months ago
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