In a school district, all sixth grade students take the same standardized test. The superintendant of the school district takes a random sample of 25 scores from all of the students who took the test. She sees that the mean score is 139 with a standard deviation of 16.5865. The superintendant wants to know if the standard deviation has changed this year. Previously, the population standard deviation was 29. Is there evidence that the standard deviation of test scores has decreased at the α=0.025

level? Assume the population is normally distributed.

Step 1 of 5:

State the null and alternative hypotheses. Round to four decimal places when necessary.

Step 2 of 5:

Determine the critical value(s) of the test statistic. If the test is two-tailed, separate the values with a comma. Round your answer to three decimal places.

Step 3 of 5:

Determine the value of the test statistic. Round your answer to three decimal places.

Step 4 of 5:

Make the decision. Reject or fail to reject

Recording purchases and sales of inventory LO1, 2 Lowder Company purchased 275 units of inventory on account for $5775. Due to early payment, Lowder received a discount and paid only $5225. Lowder then sold 150 units for cash at $55 each, purchased an additional 65 units for cash at a cost of $1430, and then sold 100 more units for cash at $55 each. Lowder uses a perpetual inventory system. Required a Prepare all journal entries to record Lowder’s purchases and sales assuming the FIFO inventory costing method

plus the following additional requirements:
> Exercise 4 additional requirement b) Prepare the same journal entries as part a, this time using the periodic inventory system using the FIFO cost flow assumption. Compare the similarities and differences between journal entries recorded using the perpetual and periodic inventory systems. You may wish to write the journal entries side by side for ease of comparison.
> Exercise 4 additional requirement c) Instead of receiving a purchase discount for early repayment, Lowder received an allowance of $2 per unit because the inventory delivered had some minor defects. Record the journal entry for the allowance under BOTH the perpetual and the periodic inventory systems.

1. What are the reasons for monopoly, (list the standard reasons for barriers to entry)?

2. Where do prices come from in a monopoly?

3. How are output and pricing decisions made by a monopolist entrepreneur?

4. How is this different from Perfect Competition?

5. Draw three graphs of a monopoly, one in each of the three situations, a, b, and c and demonstrate how you would choose a price and quantity and discuss what the monopolist would do in each situation.

6. What happens in the long-run to the monopolist in each situation and what does this say about efficiency in monopoly markets?

PYTHON

Let n denote an integer entered by the user. Write a program to print n multiples of 5 in the descending order, with the last number being 5. Print the average of those n multiples

Define the following terms with examples

(a) Absolute return

(b) Nominal rate of return

(c) Real rate of return

Do question E

The following table contains the ACT scores and the GPA (grade point average) for eight college students. Grade point average is based on a four-point scale and has been rounded to one digit after the decimal.

Student 1 2 3 4 5 6 7 8

GPA (y) 2.8 3.4 3.0 3.5 3.6 3.0 2.7 3.7

ACT (x) 21 24 26 27 29 25 25 30

We want to fit a straight-line model to relate GPA y to the ACT. ??? = ?0 + ?1 ??? + ?

a. Compute: ????, ????, ????, ?̂ 0, ?̂ 1 and hence write the equation of the fitted line.

b. Compute the fitted values and residuals for each observation, and verify that the residuals (approximately) sum to zero. (Do not use computer for parts c,d,e).

c. Draw a scatter plot of ACT and GPA

d. On your scatter plot draw the fitted line you have in part (b).

e. On your plot indicate ?3, ?̂3,?̂3

Where ?̂3 ?? ?ℎ? ???????? ??? ?ℎ? ?ℎ??? ???????????.

One hundred teachers attended a seminar on mathematical problem solving. The attitudes of representative sample of 12 of the teachers were measured before and after the seminar. A positive number for change in attitude indicates that a teacher's attitude toward math became more positive. The twelve change scores are as follows. 4; 8; −1; 1; 0; 4; −3; 2; −1; 5; 4; −2

B) What is the standard deviation for this sample? (Round your answer to two decimal places.)

C) What is the median change score? (Round your answer to one decimal place.)

D) Find the change score that is 2.2 standard deviations below the mean. (Round your answer to one decimal place.)

A clothing store is open each day for 12 hours. On average, the store gets 120 customers per day. Round each answer below to the nearest hundredth.

a. Find the probability that the store gets 140 or more customers today.

b. Find the probability that the store gets 15 or more customers in the first hour of business.

c. Find the probability that the store gets 40 or more customers in the first three hours of business.

**Please show me how to put this into a calculator Ti- 84**

5. Explain how cell division is different in prokaryotic and eukaryotic cells. Also, compare the DNA of prokaryotic and eukaryotic cell.

True or False

In 2017, venture capital dollars were concentrated in the following three industries: internet, health care, and business products and services.

Of the eight factors usually considered when valuing the venture, provide four of them along with a sentence of explanation for each factor you provide.

Describe and compare early-stage financing to expansion or development financing. Who are the usual investors in each of the two stages

Identify and briefly describe, in order, each of the four major stages of the venture capital process.

Identify the main advantages and disadvantages of going public.

A Company is selling two products A and B. It sells the two products at the prices of AED 190 and 230 respectively. The finance department estimated the fixed cost for both products A and B as AED 2400 and 2550 and the variable cost to make a unit of each product is AED 70 and 60 respectively.

1. Compute the number of units the company must sell to Break-Even from each product? Compute the total revenue at these Break-Even Points?
2. Compute the number of units the company sells at which the two products have the same total cost? Compute the company total revenue for this number of sold units?

If the company used new technology in redesigning product A and the total fixed cost reduced to AED 2250. The marketing department estimated the new selling price per unit to be AED 240 and that the company would be break-even if they sale 10 units of product A. Compute the variable cost per unit and the total variable cost of the newly designed product A?

1. Explain how a tariff reduction leads to an increase in the quantity of imports and a decrease in equilibrium price.

2. Explain how trade barriers raise wages in protected industries by reducing average wages economy-wide.

3. You have been placed in charge of trade policy for the U.S. Suppose corn is a crop that is doing well and the export market is beginning to expand. Corn production is considered an infant industry. Corn producers come to you and ask for tariff protection from cheaper corn grown in Canada. What sorts of policies will you enact and why?

Use the following corn futures quotes: Corn 5,000 bushels Contract Month Open High Low Settle Chg Open Int Mar 455.125 457.000 451.750 452.000 −2.750 597,913 May 467.000 468.000 463.000 463.250 −2.750 137,547 July 477.000 477.500 472.500 473.000 −2.000 153,164 Sep 475.000 475.500 471.750 472.250 −2.000 29,258

Suppose you buy 18 of the September corn futures contracts at the last price of the day. One month from now, the futures price of this contract is 462.5, and you close out your position. Calculate your dollar profit on this investment. (A negative value should be indicated by a minus sign. Do not round intermediate calculations. Round your answer to 2 decimal places.)