Explain why there is a steep slope in a section of the titration curve and explain how it can be used in calculations ?
In: Chemistry
#72:
Note: On this problem, some of your answers might be slightly different from Moodle's because of rounding error.
The table below gives the gold medal times for every other Summer Olympics for the women's 100-meter freestyle (swimming).
| Year | Time (seconds) |
|---|---|
| 1912 | 82.2 |
| 1924 | 72.4 |
| 1932 | 66.8 |
| 1952 | 66.8 |
| 1960 | 61.2 |
| 1968 | 60.0 |
| 1976 | 55.65 |
| 1984 | 55.92 |
| 1992 | 54.64 |
| 2000 | 53.8 |
| 2008 | 53.1 |
a. Decide which variable should be the independent variable and which should be the dependent variable.
Independent variable: AnswerYearTime (seconds)
Dependent variable: AnswerYearTime (seconds)
b. Draw a scatter plot of the data.
Please do this on your calculator (or by hand, if you prefer). Take a picture of it, and upload the picture in the appropriate place on Moodle.
c. Does it appear from inspection that there is a relationship between the variables? Why or why not?
Answer
d. Calculate the least squares line. Put the equation in the form of: y = a + bx. Round to two decimals.
y = Answer + Answerx
e. Find the correlation coefficient. Is the decrease in times
significant? Round to four decimals.
Correlation coefficient: r = Answer
Is it significant? AnswerYesNo
Explain how you know whether or not it's significant. Your answer must include either a p-value or a critical value and must explain how this value helps you determine whether or not r is significant.
Answer
f. Based on your least squares line, find the estimated gold medal time for 1932. Find the estimated time for 1984.
Round to two decimals.
Year 1932: Estimated gold medal time Answer seconds
What calculation did you do? Answer
Year 1984: Estimated gold medal time Answer seconds
What calculation did you do? Answer
g. Why are the answers from part f different from the chart values?
Answer
h. Does it appear that a line is the best way to fit the data? Why or why not?
AnswerYes, a line is the best way to fit the data.No, a line is not the best way to fit the data.
Explain your reasoning:
AnswerBecause r is significant.Because r is not significant.
i. Use the least-squares line to estimate the gold medal time for the next Summer Olympics (i.e. use the year 2020). Do you think that your answer is reasonable? Why or why not?
Round to two decimals.
Year 2020: Estimated gold medal time Answer seconds
What calculation did you do? Answer
Do you think that your answer is reasonable? Use the textbook's criteria (see Section 12.5 about Prediction).
AnswerYesNo
Explain why or why not, using the textbook's criteria.
Answer
In: Statistics and Probability
In: Economics
In: Chemistry
Note:Subject;EEC 1960 Section 01 Field experience 1:Knowledge but I choose Psychology to be easy.
Written Assignment - Creating Positive Communications to Share with Families
Engaging with families through positive communications is an essential part of an early childhood educator's role. What we do in terms of reaching out to families shapes how they, in turn, reach back to us. Families who feel welcome in the classroom are more likely to participate and become involved. For this assignment, you will be creating a positive communication as a tool for connecting with and sharing information with families. To get started, think about something important that you would like to let families know about (for example, an upcoming special event or the opportunity to visit the center). Alternately, you might choose to share some child development information (for instance, reinforcing the importance of keeping a regular schedule or about reading to children every day). Think about how to share your communication with all families, including those who are from diverse culture and language backgrounds. For the assignment, create a 1-page positive communication flyer or newsletter using one of the two templates provided below. (Or, use your own template if you prefer.) Flyer Template Newsletter Template Be sure to include all required information about who the information is for, why it's important, what will be happening (an event or visit), and/or what you want them to know (such as if they need to RSVP or not). If you are thinking about an event, be sure to include where it will be held, as well as the time. Lastly, include your name and contact information so families know who and how to reach you if they have questions.
In: Psychology
should university go paperless
Examine in detail why you are not recommending at least two possible solutions •
Explain which solution you are recommending, and provide justifications • Conclude your document with a summary of your main points • Provide a list of references
In: Psychology
|
National Co. manufactures and sells three products: red, white, and blue. Their unit sales prices are red, $46; white, $76; and blue, $101. The per unit variable costs to manufacture and sell these products are red, $31; white, $51; and blue, $71. Their sales mix is reflected in a ratio of 2:2:1 (red:white:blue). Annual fixed costs shared by all three products are $141,000. One type of raw material has been used to manufacture all three products. The company has developed a new material of equal quality for less cost. The new material would reduce variable costs per unit as follows: red, by $6; white, by $16; and blue, by $6. However, the new material requires new equipment, which will increase annual fixed costs by $11,000. |
| Required: | |
| 1. |
Assume if the company continues to use the old material, determine its break-even point in both sales units and sales dollars of each individual product. (Round up your composite units to whole number. Omit the "$" sign in your response.) |
| Break-Even Points | Sales Units | Sales Dollars |
| Red at break-even | $ | |
| White at break-even | $ | |
| Blue at break-even | $ | |
| 2. |
Assume if the company uses the new material, determine its new break-even point in both sales units and sales dollars of each individual product. (Round up your composite units to whole number. Omit the "$" sign in your response.) |
| Break-Even Points | Sales Units | Sales Dollars |
| Red at break-even | $ | |
| White at break-even | $ | |
| Blue at break-even | $ |
In: Accounting
|
National Co. manufactures and sells three products: red, white, and blue. Their unit sales prices are red, $47; white, $77; and blue, $102. The per unit variable costs to manufacture and sell these products are red, $32; white, $52; and blue, $72. Their sales mix is reflected in a ratio of 5:4:2 (red:white:blue). Annual fixed costs shared by all three products are $142,000. One type of raw material has been used to manufacture all three products. The company has developed a new material of equal quality for less cost. The new material would reduce variable costs per unit as follows: red, by $7; white, by $17; and blue, by $7. However, the new material requires new equipment, which will increase annual fixed costs by $12,000. |
| Required: | |
| 1. |
Assume if the company continues to use the old material, determine its break-even point in both sales units and sales dollars of each individual product. (Round up your composite units to whole number. Omit the "$" sign in your response.) |
| Break-Even Points | Sales Units | Sales Dollars |
| Red at break-even | $ | |
| White at break-even | $ | |
| Blue at break-even | $ | |
| 2. |
Assume if the company uses the new material, determine its new break-even point in both sales units and sales dollars of each individual product. (Round up your composite units to whole number. Omit the "$" sign in your response.) |
| Break-Even Points | Sales Units | Sales Dollars |
| Red at break-even | $ | |
| White at break-even | $ | |
| Blue at break-even | $ |
In: Accounting
|
National Co. manufactures and sells three products: red, white, and blue. Their unit sales prices are red, $53; white, $83; and blue, $108. The per unit variable costs to manufacture and sell these products are red, $38; white, $58; and blue, $78. Their sales mix is reflected in a ratio of 5:4:2 (red:white:blue). Annual fixed costs shared by all three products are $148,000. One type of raw material has been used to manufacture all three products. The company has developed a new material of equal quality for less cost. The new material would reduce variable costs per unit as follows: red, by $12; white, by $22; and blue, by $12. However, the new material requires new equipment, which will increase annual fixed costs by $18,000. |
| Required: | |
| 1. |
Assume if the company continues to use the old material, determine its break-even point in both sales units and sales dollars of each individual product. (Round up your composite units to whole number. Omit the "$" sign in your response.) |
| Break-Even Points | Sales Units | Sales Dollars |
| Red at break-even | $ | |
| White at break-even | $ | |
| Blue at break-even | $ | |
| 2. |
Assume if the company uses the new material, determine its new break-even point in both sales units and sales dollars of each individual product. (Round up your composite units to whole number. Omit the "$" sign in your response.) |
| Break-Even Points | Sales Units | Sales Dollars |
| Red at break-even | $ | |
| White at break-even | $ | |
| Blue at break-even | $ | |
In: Accounting
|
National Co. manufactures and sells three products: red, white, and blue. Their unit sales prices are red, $46; white, $76; and blue, $101. The per unit variable costs to manufacture and sell these products are red, $31; white, $51; and blue, $71. Their sales mix is reflected in a ratio of 2:2:1 (red:white:blue). Annual fixed costs shared by all three products are $141,000. One type of raw material has been used to manufacture all three products. The company has developed a new material of equal quality for less cost. The new material would reduce variable costs per unit as follows: red, by $6; white, by $16; and blue, by $6. However, the new material requires new equipment, which will increase annual fixed costs by $11,000. |
| Required: | |
| 1. |
Assume if the company continues to use the old material, determine its break-even point in both sales units and sales dollars of each individual product. (Round up your composite units to whole number. Omit the "$" sign in your response.) |
| Break-Even Points | Sales Units | Sales Dollars |
| Red at break-even | $ | |
| White at break-even | $ | |
| Blue at break-even | $ | |
| 2. |
Assume if the company uses the new material, determine its new break-even point in both sales units and sales dollars of each individual product. (Round up your composite units to whole number. Omit the "$" sign in your response.) |
| Break-Even Points | Sales Units | Sales Dollars |
| Red at break-even | $ | |
| White at break-even | $ | |
| Blue at break-even | $ |
In: Accounting