• Hypothesis testing is a set of core analysis tools used to answer questions about the characteristics of a population. The process involves a number of steps, varying from five to ten depending upon the author of the text being used. What are these steps and why is it so important to follow and explicitly state each step in the process? In your responses discuss the properties of hypotheses, the importance and meaning of the level of significance and the various kinds of tests we might choose from and why.
• One and Two sample hypothesis tests (see week five for the two sample tests) are either comparing a sample to a standard value or comparing to samples to each other. Thanks to the CLT and the empirical rule we can usually trust the results

• Hypothesis testing is a set of core analysis tools used to answer questions about the characteristics of a population. The process involves a number of steps, varying from five to ten depending upon the author of the text being used. What are these steps and why is it so important to follow and explicitly state each step in the process? In your responses discuss the properties of hypotheses, the importance and meaning of the level of significance and the various kinds of tests we might choose from and why.
• One and Two sample hypothesis tests (see week five for the two sample tests) are either comparing a sample to a standard value or comparing to samples to each other. Thanks to the CLT and the empirical rule we can usually trust the results

Consider a population of 1024 mutual funds that primarily invest in large companies. You have determined that μ​, the mean​ one-year total percentage return achieved by all the​ funds, is 9.70 and that σ​, the standard​ deviation, is 1.75. Complete​ (a) through​ (c).

a. According to the empirical​ rule, what percentage of these funds is expected to be within ±3 standard deviations of the​ mean?

b. According to the Chebyshev​ rule, what percentage of these funds are expected to be within ±2 standard deviations of the​ mean ​(Round to two decimal places as​ needed.)

c. According to the Chebyshev​ rule, at least 88.89% of these funds are expected to have​ one-year total returns between what two​ amounts? ​(Round to two decimal places as​ needed.)

Many people believe that unusual behavior is more likely to occur during a full moon. As a test for empirical evidence to support this belief, suppose that you categorized the visits of new clients to a community health unit over a one-year period by lunar phases and found the following distribution of visits: Full moon 62, new moon 50, first quarter 60, and third quarter 56.

Answer the following questions:

1. What are the null and alternate hypotheses?

2. What are the expected values for each of the categories?

3. What is the chi-square obtained?

4. What is the critical value?

5. What is your statistical decision? Justify your answer.

6. What is your conclusion?

Consider a population of 10241024 mutual funds that primarily invest in large companies. You have determined that muμ​, the mean​ one-year total percentage return achieved by all the​ funds, is 8.408.40 and that sigmaσ​,the standard​ deviation, is 3.503.50. Complete​ (a) through​ (c). a. According to the empirical​ rule, what percentage of these funds is expected to be within ​±33 standard deviations ,deviations of the​ mean? 99.799.7​% b. According to the Chebyshev​ rule, what percentage of these funds are expected to be within

​±22 standard deviations of the​ mean? -75.075.0​% ​(Round to two decimal places as​ needed.)

***** c. According to the Chebyshev​ rule, at least

88.8988.89​%

of these funds are expected to have​ one-year total returns between what two​ amounts?

Between_ and _.

A-CH3SH reacts with CO according to the following unbalanced chemical equation:

CH3SH + CO → CH3CO(SCH3) + H2S

Calculate the mass in grams of the excess reagent remaining after the complete reaction of 2.17 g of CH3SH with 1.45 g of CO. ( )

B- a compound containing only C, H and O was subjected to combustion analysis. A sample of 4.270×10¹ g produced 9.200×10¹ g of CO₂ and 3.766×10¹ g of H₂O. Determine the empirical formula of the compound and enter the appropriate subscript after each element.

C( ) H( ) O( )

If the molar mass of the compound is 204.266 g/mol, determine the molecular formula of the compound and enter the appropriate subscript after each element.
C( ) H( ) O( )

Cu(II) sulfate exists as a hydrate. It has many practical uses including use as a fungicide and pesticide. When mixed with chromium and arsenic it forms the wood preservative called CCA. CCA was used in pressure treated wood to protect wood from rotting due to insects and microbial agents. Because CCA-treated wood contains toxic heavy metals, its use has been discontinued for home use and children’s play sets.

A chemist is given a sample of the CuSO₄ hydrate and asked to determine the empirical formula of it. The original sample weighed 42.75 g. After heating to remove the waters of hydration, the sample weighed 27.38 g. Determine the formula for this hydrate.

Please show all work!

2. The data sample,below gives the lengths (in cm) of 43 male coyotes found in Nova Scotia. For this x=92.06ands=6.70.

78.0 80.0 90.0 90.5 96.0 96.0,80.0 81.3 83.8 84.5 85.0 86.0 86.4 86.5 87.0 88.0 88.0 88.9 88.9 91.0 91.0 91.0 91.4 92.0 92.5 93.0 93.5 95.0 95.0 95.0 95.0 95.5 96.0 96.0 97.0 98.5 100.0 100.5 101.0 101.6 103.0 104.1 105.0

This data has a bell-shaped distribution. See how well the empirical rule describes the actual distribution of this data by finding the percentage of sample values within one, two, and three standard deviations of the mean.

Analyzing and Interpreting Income Disclosures

Sales information for Tesla Inc. follows.

Automotive sales revenue includes revenues related to sale of new Model S, Model X and Model 3 vehicles, including access to our Supercharger network, internet connectivity, Autopilot, full self-driving and over-the-air software updates.

Automotive leasing revenue includes the amortization of revenue for Model S and Model X vehicles under direct lease agreements as well as those sold with resale value guarantees accounted for as operating leases under lease accounting. We do not yet offer leasing for Model 3 vehicles.

Services and other revenue consists of non-warranty after-sales vehicle services, sales of used vehicles, sales of electric vehicle components and systems to other manufacturers, retail merchandise, and sales by our acquired subsidiaries to third party customers.

Energy generation and storage revenues consists of the sale of solar energy systems and energy storage systems to residential, small commercial, and large commercial and utility grade customers.

Compute the relative size of sales revenue from the four types of revenue Tesla discloses. (Hint: Scale each type of revenue by total revenue.)
Round answers to the nearest whole percentage.

Compute the growth in sales revenue for both years from each of the four types of revenue.

• Round answers to the nearest whole percentage.
• Use a negative sign with answers, when appropriate.

Classique Household Furnishings & Appliances is a family-owned furniture store. You are the management accountant of the concern and have been given the task of preparing the cash budget for the business for the quarter ending September 30, 2018. Your data collection has yielded the following

Extracts from the sales and purchases budgets are as follows:

Cash Sales

$50,000 $65.000 $43,400 $52,800 $56,750

Sales Purchases On Account On Account

$480,000 $600,000 $720,000

$640,000

$800,000

$390.000 $360,000 $450,000 $400,000

$500,000

Month

May

June

July August September

An analysis of the records shows that trade receivables (accounts receivable) for sales on account are settled according to the following credit pattern, in accordance with the credit forms 5/30, n90:

50% in the month of sale 35% in the first month following the sale 15% in the second month following the sale

Accounts payable are settled as follows, in accordance with the credit forms - 4/30, n60 70% in the month in which the inventory is purchased 30% in the following month

Monthly rental is received from a tenant for storage space rental to him by Classique Household Furnishings & Appliances. The rental is $840,000 per annum and is received quarterly in advance

Rental relating to the quarter under review becomes due on July 1.

Computer equipment, which is estimated to cost $350,000, will be acquired for cash in August The manager has made arrangements with the seller to make a cash deposit of 50% of the amount upon signing of the agreement in August with the balance to be settled in four equal monthly instalments, starting in September 2018.

An investment instrument purchased by the company with a face value of $480,000 will mature on July 20, 2018 and will be liquidated on that date. At the same time, quarterly interest computed at a rate of 8% % per annum will also be collected.

Fixed operating expenses, which accrue evenly throughout the year are estimated to be $1,920.000 per annum including depreciation on non-current assets of $42,000 per month and are settled monthly

i)

iv)

vi)

vii)

viil)

Wages and salaries are expected to be $2,304,000 per annum and will be paid monthly

Other operating expenses are expected to be $144,000 per quarter and are settled monthly

In the month of August, furniture & fixtures, which cost $455,000, will be sold to an employee at a Inss of $20.000. Accumulated depreciation on the furniture & fixtures at that time is expected to be $305,000. The employee will be allowed to pay a deposit equal to 60% of the selling price in