lesreponses
Calculators
General
Algebra
Geometry
Coordinate-geometry
Statistics
Calculus
Qna
Math
lesreponses
lesreponses
Home
General
Algebra
Geometry
Coordinate-geometry
Statistics
Calculus
Qna
Math
MATH SOLVE
Home
An experiment on memory was performed, in which 16 subjects were randomly assigned to one of two groups, called "Sentences" or "Intentional". Each subject was given a list of 50 words. Subjects in the "Sentences" group were told to form multiple sentences, each using at least two words from the list, and to keep forming sentences until all the words were used at least once. Subjects in the "Intentional" group were told to spend five minutes memorizing as many of the 50 words as possible. Subjects from both groups were then asked to write down as many words from their lists as they could recall. We are interested in determining if there is a significant difference in the average number of words recalled for subjects in the "sentences" group vs. subjects in the "intentional" group, using α = 0.05. The data is in the table below.Number of words recalled"Sentences" group 37 26 29 27 26 29 28 28"Intentional" group 32 30 34 31 32 30 33 31A. Enter the values for the following statistics:xsentences =ssentences =xintentional =sintentional =(xsentences - xintentional) =standard error of (xsentences - xintentional) =
General
4 months ago
Dreamtime Laundry purchased $7,000 worth of supplies on June 2 and recorded the purchase as an asset. On June 30, an inventory of the supplies indicated only $2,000 on hand. The adjusting entry that should be made by the company on June 30 isa. Debit Supplies Expense, $2,000; Credit Supplies, $2,000.b. Debit Supplies, $2,000; Credit Supplies Expense, $2,000.c. Debit Supplies, $5,000; Credit Supplies Expense, $5,000.d. Debit Supplies Expense, $5,000; Credit Supplies, $5,000
General
4 months ago
The curve produced by the water coming from a hose is sketched onto a graph with zeros at 1 and 5. The point (4,1) also lies on the curve. If h(x) represents the vertical distance from where the water first comes out of the hose andx represents the horizontal distance, which statements are true? Check all that applyThe scenario can be represented by the function h(x)=-0256)(x-5).The scenario can be represented by the function h(x)= 16)(x + 5).The vertex is on the line x=25.The greatest height that the water reaches is 15 units.The scenario can be represented by the function h(x)=-166-5).
General
4 months ago
Michelle correctly solved a linear equation and the last line of her work was: 1 = 2Which statement best describes the solution to the equation Michelle was solving?The only solution is 1The only solution is 2The solutions are 1 and 2The equation has infinitely many solutionsThe equation has no solutions
General
4 months ago
Listed below are systolic blood pressure measurements (mm Hg) taken from the right and left arms of the same woman. Assume that the paired sample data is a simple random sample and that the differences have a distribution that is approximately normal. Use a 0.10 significance level to test for a difference between the measurements from the two arms. What can be concluded? Right arm 152 138 135 139 132 Left arm 178 176 176 142 151
General
4 months ago
Find the perimeter 5 + 8 + 11 + 10 = 3455/2 = 27.5405 + 8 + 11 + 3.74 = 27.74
General
4 months ago
Please help solve this system of equations[tex]\left\{\begin{matrix}\frac{\sqrt[3]{2x+y}}{y}+\frac{\sqrt[3]{2x+y}}{2x}=\frac{81}{182} \\\frac{\sqrt[3]{2x-y}}{y}-\frac{\sqrt[3]{2x-y}}{2x}=\frac{1}{182} \end{matrix}\right.[/tex]
General
4 months ago
There has been a trend toward less driving in the last few years, especially by young people. From 2001 to 2009 the annual vehicle miles traveled by people from 16 to 34 years of age decreased from 10,300 to 7900 miles per person (U.S. PIRG and Education Fund website, April 6, 2012). Assume the standard deviation was 2000 miles in 2009. Suppose you would like to conduct a survey to develop a 95% confidence interval estimate of the annual vehicle-miles per person for people 16 to 34 years of age at the current time. A margin of error of 100 miles is desired. How large a sample should be used for the current survey?
General
4 months ago
Thirty-two percent of all Americans drink bottled water more than once a week (Natural resources Defense Council, December 4, 2015). Suppose you have been hired by the Natural Resources Defence Council to investigate bottled water consumption in St. Paul. You plan to select a sample of St. Paulites to estimate the proportion who drink bottled water more than once a week. Assume the sample proportion of St. Paulites to estimate the proportion who drink bottled water more than once a week is 0.32, the same as the overall proportion of americans who drink bottled water more than once a week. Use z-table. a. Suppose you select a sample of 540 St.Paulites. Show the sampling distribution of p (to 4 decimals) ク b. Based upon a sample of 540 St. Paulites, what is the probability that the sample proportion will be within 0.08 of the population proportion (to 4 decimals). probability= .9999 C. Suppose you select a sample of 230 St.Paulites. Show the sampling distribution of (to 4 decimals) =| .0201 0 d. Based upon a smaller sample of only 230 St. Paulites, what is the probability that the sample proportion will be within 0.08 of the population proportion (to 4 decimals) probability = .9907 e. As measured by the increase in probability, how much do you gain in precision by taking the larger sample in parts (a) and (b) rather than the smaller sample in parts (c) and (d)? Reduced by Have gain in precision by increasing the sample.
General
4 months ago
A solid lies between planes perpendicular to the x-axis at x tox=. The cross sections perpendicular to the x-axis are circular disks with diameters running from the curve y cotx to the curve y csc x. Find the volume of the solid. A. +1) OA 6 2 OB. (2/3-2)-3 n2 O C. (3-1)x+ (3-1) D. 2 12
General
4 months ago
can you rearrange it so T is the subject
General
4 months ago
State whether each of the following changes would make a confidence interval wider or narrower. (Assume that nothing else changes.) a. Changing from a 95% confidence level to a 99% confidence level. b. Changing from a sample size of 15 to a sample size of 350. c. Changing from a standard deviation of 15 pounds to a standard deviation of 20 pounds.
General
4 months ago
Explain why the two figures below are similar. Use complete sentences and provide evidence to support your explanation. (10 points)
General
4 months ago
The New Orleans Saints scored 7 fewer points than twice the points scored by the Pittsburgh Steelers. The two teams together scored a total of 32 points. Write and solve an equation to show how many points each team scored.
General
4 months ago
The exponential model Upper A equals 104.8 e Superscript 0.001 t describes the population, A, of a country in millions, t years after 2003. Use the model to determine when the population of the country will be 106 million.
General
4 months ago
A college is currently accepting students that are both in-state and out-of-state. They plan to accept three times as many in-state students as out-of-state, and they only have space to accept 100 out-of-state students. Let x = the number of out-of-state students and y = the number in-state students. Write the constraints to represent the incoming students at the college.
General
4 months ago
Consider a t distribution with 7 degrees of freedom. Compute P(-1.29 < t < 1.29). Round your answer to at least three decimal places.Consider a t distribution with 18 degrees of freedom. Find the value of c such that P(t<= c) = 0.05. Round your answer to at least three decimal places.
General
4 months ago
Point Y is the circumcenter of ΔDEF. Point Y is the circumcenter of triangle D E F. Lines are drawn from the points of the triangles to point Y. Lines are drawn from point Y to the sides of the triangle to form right angles and line segments Y L, Y M, and Y N. The line segments cut the sides of the triangles into 2 equal parts. The length of F Y is 3 x + 7 and the length of Y E is 5 x minus 3. Find FY. a. 5 b. 11 c. 17 d. 22
General
4 months ago
Consider an employee's whose earnings, in dollars, are according to the continuous stream f(t)=5,000e0.1t for t>0, where t is measured in years. How many years will it take them to earn a combined total of $100,000? Give your answer in years to the nearest year.
General
4 months ago
Fatima conducted an experiment where she asked people to estimate the temperature of glasses of water. She recorded how far the estimates were from the actual temperatures, using positive values for guesses that were too high and negative values for guesses that were too low. Her results are in the table below.
General
4 months ago
Previous
1
2
3
4
5
6
7
8
9
10
11
12
13
Next