yoursafelist
Calculators
General
Algebra
Geometry
Coordinate-geometry
Statistics
Calculus
Qna
Math
yoursafelist
yoursafelist
Home
General
Algebra
Geometry
Coordinate-geometry
Statistics
Calculus
Qna
Math
MATH SOLVE
Home
You and some friends have decided to test the validity of an advertisement by a local pizza restaurant, which says it delivers to the dormitories faster than a local branch of a national chain. Both the local pizza restaurant and national chain are located across the street from your college campus. You define the variable of interest as the delivery time, in minutes, from the time the pizza is ordered to when it is delivered. You collect the data by ordering 10 pizzas from the local pizza restaurant and 10 pizzas from the national chain at different times. The hypothesis test to be performed is:
General
2 months ago
Nia has $19.50 to ride the subway around New York. It will cost her $0.75 every time she rides. Identify the dependent variable and independent variable in this scenario. The number of rides and the total cost are both independent variables. The number of rides and the total cost are both dependent variables. The number of rides is the independent variable, and the total cost is the dependent variable. The total cost is the independent variable, and the number of rides is the dependent variable.
General
2 months ago
Solve the inequality for x. Show each step of the solution.8x>6(3x-1)- 14
General
2 months ago
Rogerio drives 1 hour and 18 min to meet a friend. the first 30 min of his trip was mostly highway driving, so he averaged 64 miles per hour for this portion. for the last 48 min of this trip, he averaged 50 miles per hour. what was his average speed for the entire trip?A) 60 miles per hourB) 58 miles per hourC) 55 miles per hourD) 53 miles per hour
General
2 months ago
12x+7<−11 AND5x−8≥4012
General
2 months ago
The vertices of the pentagon ABCDE are A(0,4), B(4,0), C(3,- 4), D(-3,- 4), E(-4,0). If the pentagon is translated 5 units down and 4units right, the new vertices are:a. A'(4, -1), B'(8,-5), C'(7,-9), D'(1,-9), E'(0,-5)b. A'(4, -1), B'(8,-5), C'(7,-9), D'(1,-9), E'(1,-5)C. A'(4, -1), B'(5,-5), C'(7,-9), D'(1,-9), E'(0,-5)d. A'(4, -1), B'(8,-5), C'(7.-9), D'(0,-9), E'(0,-5)
General
2 months ago
An English teacher needs to pick 9 books to put on his reading list for the next school year, and he needs to plan the order in which they should be read. He has narrowed down his choices to 4 novels, 6 plays, 5 poetry books, and 5nonfiction books.Step 2 of 2 :If he wants to include all 4novels, how many different reading schedules are possible? Express your answer in scientific notation rounding to the hundredths place.
General
2 months ago
twice the difference of a number and 5 is at most 18
General
2 months ago
Earth scientists study
General
2 months ago
A regular coca-cola can have a radius of 1.25 inches and a height of 4.75 inches. Approximately how many cubic inches of coca-cola will the can hold?(use 3.14 for π) The volume of a cylinder formula: V = π r2 ha. 23.30b. 29.15c. 93.27d. 233.17
General
2 months ago
An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in Texas. He believes that the mean income is $20.4, and the standard deviation is known to be $8.8. How large of a sample would be required in order to estimate the mean per capita income at the 98% level of confidence with an error of at most $0.54$? Round your answer up to the next integer.
General
2 months ago
A recent study conducted by the state government attempts to determine whether the voting public supports a further increase in cigarette taxes. The opinion poll recently sampled 1500 voting age citizens. 1020 of the sampled citizens were in favor of an increase in cigarette taxes.The state government would like to decide if there is enough evidence to establish whether the proportion of citizens supporting an increase in cigarette taxes is significantly greater than .66.Identify the null hypothesis AND identify the alternate hypothesis.a. p=.66b. p>.66c. p<.66d. p≤.66
General
2 months ago
The librarian at the local elementary school claims that, on average, the books in the library are more than 20 years old. To test this claim, a student takes a sample of 30 books and records the publication date for each. The sample produces an average age of 23.8 years with a variance of 67.5. What test should you use to determine whether the average age of the library books is significantly greater than 20 years.
General
2 months ago
The brain volumes (cm3) of 20 brains have a mean of 1106.4cm3 and a standard deviation of 123.2cm3. Use the given standard deviation and the range rule of thumb to identify the limits separating values that are significantly low or significantly high. For such data, would a brain volume of 1402.8cm3 be significantly high?
General
2 months ago
The floor of a storage unit is 8 meters long and 15 meters wide. What is the distance between two opposite corners of the floor?
General
2 months ago
The US Department of Transportation provides the number of miles that residents of the 75 largest metropolitan areas travel per day in a car. Suppose that for a simple random sample of 50 Buffalo residents the mean is 22.5 miles a day and the standard deviation is 8.4 miles a day. For an independent simple random sample of 40 Boston residents the mean is 18.6 miles a day and the standard deviation is 7.4 miles a day.a.What is the point estimate of the difference between the mean number of miles that Buffalo residents travel per day and the mean number of miles that Boston residents travel per day?b.What is the 95% confidence interval for the difference between the two population means?
General
2 months ago
A social scientist wishes to estimate the mean number of years of education µ for adults in a certain large city. She surveys a random sample of 100 aadults and finds that the sample mean is 12.98 years and sample variance of is 9. canstruct a 99% confidence interval for the mean number of years of education for adults in the city.
General
2 months ago
A recent drug survey showed an increase in the use of drugs and alcohol among local high school seniors as compared to the national percent. Suppose that a survey of 100 local seniors and 100 national seniors is conducted to see if the proportion of drug and alcohol use is higher locally than nationally. Locally, 69 seniors reported using drugs or alcohol within the past month, while 60 national seniors reported using them. Conduct a hypothesis test at the 5% level of significance.
General
2 months ago
Let X denote the distance (m) that an animal moves from its birth site to the first territorial vacancy it encounters. Suppose that for banner-tailed kangaroo rats, X has an exponential distribution with parameter λ = 0.01352. (a) What is the probability that the distance is at most 100 m? At most 200 m? Between 100 and 200 m? (Round your answers to four decimal places.)
General
2 months ago
According to a certain news poll, 71% agreed that it should be the government's responsibility to provide a decent standard of living for the elderly, and 41% agreed that it would be a good idea to invest part of their Social Security taxes on their own. If agreement with one of these propositions is independent of agreement with the other, what is the probability that a person agreed with both propositions? (Round your answer to two decimal places.) HINT [See Quick Examples 4 and 5.]
General
2 months ago
Previous
1
2
3
4
5
6
7
8
9
10
11
12
13
Next