VEC Unit 3 Exam Practice Problems Chapters 9 & 14 Chapter 9 1 Consider the following hypothesis test: Ho: μ>20 H1: H<20 A sample of 50 provided a sample mean of 19.4. The population standard deviation is 2 Compute the value of the test statistic. What is the p-value? a. b. Using a .05, what is your conclusion? What is the rejection rule using the critical value? What is your conclusion? C. d. 2. Consider the following hypothesis test: Ho: H245 H1: H 45 A sample of 36 is used. Identify the p-value and state your conclusion for each of the following sample results. Use a .01. a. x 44 and s = 5.2 b. x 43 and s = 4.6 46 and s = 5.0 c. x Ten years ago 53% of American families owned stocks or stock funds. Sample data collected by the Investment Company Institute indicate that the percentage is now 46% (The Wall Street Journal. October 5, 2012) 3. Develop appropriate hypotheses such that rejection of Ho will support the conclusion that a smaller proportion of American families own stocks or stock funds in 2012 than 10 years ago. a. Assume that the Investment Company Institute sampled 300 American families to estimate the percent owning stocks or stock funds was 46 % in 2012. What is the p-value for your hypothesis test? At a .01, what is your conclusion? b. C.

Q: simplify to lowest terms 10m4/12m5

A: Given expression can be expressed as

Q: The graph of a function is given. Graph the inverse function.

A: Take reflection about y=x line.

Q: 2/7,545

A:

Q: Write an algebraic expression for "the sum of 6 and the quotient of 8 and a number m."

A:

Q: What is the domain and range

A: The domain of a function is defined as the set of values of input (x) for which the function is…

Q: what is 145+152

A:

Q: what expression is equivalent to  3x2−4xy+y23x2−4xy+y2?

A: I have given the answer in the next step. Hope you understand that

Q: simplify (-21+24 root 7)/(72+7 root 7)

A: The given expression is

Q: the answer is a but many students in my class are opting for c, which makes no sense to m

A: Total states = 50 The x-axis of the histogram shows the average property damage in millions.

Q: Evaluate: 2log3 9.

A: To Determine: evaluate    2log39  Explanation: we know that logaa=1 andlogab=bloga

Q: A Data has a mean of 50 and a standard deviation of 6. (a) What are the mean and standard deviation…

A: Central Limit Theorem for mean: If a random sample of size N is taken from a population having mean…

Q: what is 12x50

A: We will find the value 12×50 in the following step.

Q: just quick question before i write this down on my homework are those 9s or gs? sorry its coming in…

A: We need to distinguish between 9 or g.

Q: Simplify. (3zy³)* ,3'

A: Given: 3xy33

Q: 9z2 + 6 dr 13 + 2x +2

A: Given : ∫139x2 + 6x3 + 2x + 2dx

Q: Simplify. (3zy*)

A:

Q: He-Ne helium-neon laser has a wavelength of 633 nm and an effective medium length of 14 cm. It…

A:

Q: What is the integer of 60 feet below sea level

A: Result  The integer that represents the depth  is -60.

Q: Please simply  6(9-4) ÷ (-3)

A:

Q: inside a room with current temperature of 31 degrees Celsius, a left over Fried Chicken is removed…

A: Given that From a table inside a room with a current temperature of 31 degrees Celsius, a leftover…

Q: Evaluate 5P4 5C4 Mention Definition and please No handwritten

A: mPn=m!n! mCn=m!n!(m-n)!

Q: What is a equivalent expression in distributive property to 10x-35

A: Given 10x-35

Q: Simplify 18m-24 divided by 60

A: We have to simplify (18m - 24) divided by 60 So ,

Q: Explain the Importance of mode and range

A: In statistics, the mode is important for the following reasons: Reason 1: It lets us know which…

Q: The total number of 3-digit numbers, whose sum of digits is 10, is

A: Let xyz be the three digit number.  Among the three numbers x cannot be less than one as it would…

Q: What is 8! Simplified? I've never seen this with an explanation mark.

A: ! This mark represents Factorial.

Q: 131. -7 < 2r - 3 < 15

A:

Q: When measuring the depth of a submarine, +100 means the submarine ascended 100 feet and –100 means…

A:

Q: Reduce to lowest terms: 1-27x6 1-9x

A: The given expression is  ( 1 - 27x6)/(1 - 9x4)

Q: What is the difference of -8 and -3,increased by 5

A: Difference of -8 and -3 is  -8 - (-3)  = -8 + 3 = -5

Q: Simplify: 30 - 3 12 - 3

A:

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.