ss of the drug, a researcher selects a 20 children diagnosed with the disorder cach child's attention span before and af- Irug. The data show an average increase an of Mp = 4.8 minutes with a variance the sample of difference scores. sufficient to conclude that Ritalin y improves attention span? Use a one- with a = .05. e 80% confidence interval for the mean ttention span for the population.

Q: When 6 is added to four times a number, the result is 50. Find the number A) 10 B) 11 C) 12 D) 13

A: Let a number x.

Q: What is the correct answer to this question? a) 6 months b) 3 months c) 2 years d) 1 year e) 3…

A: The given data is:We have to find the period from this data.

Q: Fill in the expected frequencies for the cells. A в Total 1 75 2 25 Total 75 25 100 (Type integers…

A: In chi-square tests, there will be two types of counts, one is expected counts (denoted by E) and…

Q: rom the digits 1 to 9 how many numbers of 5 different digits each can be formed if each number…

A: Given that  Total number of digits = 9  [  1 2 3 4 5 6 7 8 9 ] Number of odd digits = 5  [ 1 3 5 7 9…

Q: 2,2 and write tte answers in the comepute form of atib s 2.

A: Since you have posted a question with multiple sub parts we will solve first three sub parts for…

Q: Evaluate xdx -1x+1 O 1) 16 O 2) 1 O 3) O O 4) 4

A: Option 3 is correct See the calculation and answer below

Q: Simplify fully: 15 a) 12 28

A:

Q: 8. Express each of the following with integer addition or subtraction. Then, evaluate the equation.…

A: see below the answer and calculation

Q: Using the information above, compute the following: a) SS1 = b) SS2 c) ô 2

A: Givenn1=17 , μ^1=966 , σ^1=2.4n2=12 , μ^2=78.2 , σ^2=1.6a) SS1 = σ^12 x df1…

Q: 229 out of 312 males have completed their math requirement. 144 out of 204 females have completed…

A: See the handwritten solution

Q: 23) A car and a van departed separately from Town A and Town B. They met for the first time at 3589…

A: A car and a van departed from town A and B. They met 1st time at 3589 km away from town A.In the…

Q: 30) Translate the following phrase into mathematical expressions. Use x to represent "a number." a.…

A: The phrases are “a) the product of a number and 12” and “b) ten times a number subtracted from 21”.

Q: 18) Solve 182 - 56 using the following methods: A. Counting- Up Method: B. Equal Addition Method:

A: Explanation of the answer is as follows

Ratios

A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.

Trigonometric Ratios

Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.