A medical researcher wants to compare He believes that the pulse rate for smokers and non-smokers is different and wants to test this claim at the 0.05 level of significance. A sample of 52 smokers has a mean pulse rate of 78, and a sample of 64 non-smokers has a mean pulse rate of 74. The population standard deviation of the pulse rates is known to be 8 for smokers and 7 fc non-smokers. Let u, be the true mean pulse rate for smokers and u, be the true meam pulse rate for non-smokers. Hai Mi =Nz Step 1. State the null and alternative hypotheses for the test. Answer: Step 2. Compute the value of the test statistic. Round your answer to two decimal places. Answer: Step 3. Find the p-value associated with the test statistic. Round your answer to four decimal places. Answer: p = %3D Step 4. Make the decision for the hypothesis test. A) Reject Null Hypothesis B) Fail to Reject Null Hypothesis

Q: 3/20 + 13/15 combine.

A:

Q: Multiply. 3v 4v +2 6y +3 y /12

A:

Q: Find L{1}ℒ{1}.

A:

Q: a3-16a

A: a³−16a ⇒a(a²−16) ⇒a(a² −4²) ⇒a(a+4)(a−4)

Q: 3(n-2)=36

A: Simplification

Q: 3.9b + a3 + 27 - 3a2 + 5a3 - 2a2 + 2.1b + 7

A:

Q: 目 +8 LI +T 现 +04 +C4 |F|E|F|| ||||4 4 4 2 2

A:

Q: graph shows the relationship between the volume of the dilated box and the scale factor. diusuon 5.…

A:

Q: -6 (0 Find A-' if A 2 -4 -3 10

A:

Q: In the

A: In the diagram it is given that, the angles <G and <H are complementary. m<G = 2x + 10…

Q: 3. Find L-¹{√534}. (s+3)

A:

Q: w + (-7), when w = - 1

A: The expression is given by w+(-7) To evaluate: The value of the expression when w=-1.

Q: (n + 4)3 =

A: Given query is to expand (n+4)3

Unitary Method

The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products. 

Speed, Time, and Distance

Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.

Profit and Loss

The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.

Units and Measurements

Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.