Questions
The emergence of rationalism and empirical thinking during the Enlightenment challenged long-held ideas and values of...

The emergence of rationalism and empirical thinking during the Enlightenment challenged long-held ideas and values of traditional social and cultural institutions. Why does change inspire fear? Must it always?

In: Psychology

you created a portfolio by purchasing  2000 shares of x company 2 dollar each, and 2000 shares...

you created a portfolio by purchasing  2000 shares of x company 2 dollar each, and 2000 shares of y 1 dollar each.

During the year   x company declared a cash dividend of   200 cents per share, while y did not give any dividend.

After one year you sold your both the shares. x at 1.8 dollar each and   y at 1.3 dollar each.

Calculate the HPY for your portfolio.

In: Finance

Generate comparative boxplots for: Male data between 2000 and 2015, Female data between 2000 and 2015,...

Generate comparative boxplots for: Male data between 2000 and 2015, Female data between 2000 and 2015, Both Sexes data between 2000 and 2015

Using the data from 2000, estimate the mean adult mortality rates for male, female and both sexes for the world population with 95% confidence.

Using the data from 2015, estimate the mean male, female and both sexes adult mortality rates for the world population with 95% confidence.

Estimate the mean difference (with 95% confidence) between: Male adult mortality rates of 2000 and 2015, Female adult mortality rates of 2000 and 2015, Both sexes adult mortality rates of 2000 and 2015

2000 2015
Male Female Both Sexes Male Female Both Sexes
88 56 73 64 42 53
91 48 70 70 34 52
96 67 88 75 47 68
99 57 78 74 44 59
99 54 76 75 41 58
99 56 78 71 39 55
100 80 92 74 59 69
102 61 82 78 50 64
104 57 80 70 37 54
106 68 87 80 53 66
110 71 96 98 58 81
113 88 107 81 57 75
119 91 106 91 65 78
119 49 84 99 45 72
124 94 110 93 79 88
126 68 98 78 48 63
127 64 96 85 45 65
128 96 112 111 83 98
132 69 101 93 55 74
132 97 115 98 71 85
135 70 103 110 53 82
138 92 115 113 70 92
142 62 103 104 51 78
145 63 105 102 49 76
145 83 114 128 77 103
146 70 110 98 51 74
150 128 139 79 43 61
157 100 127 124 74 98
160 104 138 110 70 99
160 89 125 130 72 102
174 89 131 145 88 116
177 169 173 151 105 129
179 94 137 153 80 116
179 74 127 131 60 95
180 137 155 137 97 114
181 133 156 154 108 130
183 140 160 104 86 95
187 101 144 131 80 106
190 102 149 167 79 123
195 147 172 166 126 146
196 174 185 181 151 166
199 93 142 165 78 118
200 79 139 185 68 127
208 158 183 167 109 138
210 166 188 204 147 176
213 157 186 181 129 156
218 87 153 166 67 117
226 99 163 187 83 137
231 133 182 185 97 142
240 109 175 191 74 133
241 145 192 193 100 145
241 137 189 237 132 184
242 143 192 188 105 147
242 103 175 202 76 138
243 140 192 174 104 139
247 140 194 192 105 148
248 142 197 216 123 170
250 140 198 205 116 161
251 194 224 216 142 181
252 198 224 217 164 190
261 184 222 240 158 198
265 176 221 234 138 188
273 163 219 272 145 211
274 210 243 217 154 186
281 223 250 225 156 188
287 280 284 236 199 220
293 300 296 239 219 229
296 105 200 244 87 165
298 246 272 252 202 227
298 193 246 256 173 215
305 309 307 266 267 266
307 132 218 262 105 178
314 239 274 209 143 174
314 121 218 177 61 119
322 116 218 226 82 153
326 219 274 307 136 222
329 286 308 274 224 249
337 275 305 270 211 240
354 296 325 265 215 241
356 135 247 294 98 196
372 321 346 283 234 258
374 293 335 312 236 275
382 329 355 340 283 312
402 359 380 351 313 332
410 378 394 377 338 357
412 170 292 279 118 198
430 378 404 378 333 356
431 401 416 288 245 267
437 379 408 362 308 335
466 450 457 311 245 279
473 446 461 414 377 397
524 333 426 313 152 227
577 499 536 425 326 373
594 582 588 398 330 365
641 654 647 298 212 256
654 575 614 360 242 303
655 675 665 359 313 336
712 433 593 289 222 255
443 158 307 325 118 222
301 145 225 231 102 166
256 220 238 187 143 165

In: Statistics and Probability

According to the Original Tooth Fairy Poll sponsored by Delta Dental, the average payout per tooth...

According to the Original Tooth Fairy Poll sponsored by Delta Dental, the average payout per tooth by the Tooth Fairy was $1.50 in 2000. In 2017, the payment per tooth went up to $4.66.[1] What has been the average annual growth rate of Tooth Fairy payment from 2000 to 2017? The S&P index value in 2000 is 1360.16,[2] and the index value is 2294.69 in 2017.[3] What has been the average annual growth rate of the S&P 500 from 2000 to 2017?

In: Finance

Explain what is meant by open interest, Why does the open interest usually decline during the...

Explain what is meant by open interest, Why does the open interest usually decline during the month preceding the delivery month? On a particular day. there were 2000 trades in a particular futures contract. This means that there were 2000 buyers (going long) and sellers (going short). Of the 2000 buyers, 1400 were closing out positions and were entering into new positions. Of the 2000 sellers. 1200 were closing out positions and 800 were entering into new positions. What is the impact of the day trading on open interest?


In: Finance

If you wish to obtain 14.0 g of cadmium metal from cadmium(II) sulfide, what mass of CdS (in grams) must you use?

 

-

Calculate the mass percent of cadmium in ,CdS cadmium(II) sulfide.

Mass percent = %

If you wish to obtain 14.0 g of cadmium metal from cadmium(II) sulfide, what mass of CdS (in grams) must you use?

Mass = g

-

Nornicotine, a poisonous compound found in tobacco leaves, is 72.9% C , 8.16% H , and 18.94% N . Its molar mass is 148 g/mol. What are the empirical and molecular formulas of nornicotine?

Empirical formula:

Molecular formula:


Which of the following samples has the largest number of ions?

1.0 g of CaBr2
1.0 g of SrS
1.0 g of MgBr2
1.0 g of BeSO4
1.0 g of BaCO3

In: Chemistry

Suppose annual salaries for sales associates from Geoff's Computer Shack have a mean of $32,500 and...

Suppose annual salaries for sales associates from Geoff's Computer Shack have a mean of $32,500 and a standard deviation of $2,500.

a. Calculate and interpret the z-score for a sales associate who makes $36,000.
b. Suppose that the distribution of annual salaries for sales associates at this store is bell-shaped. Use the empirical rule to calculate the percentage of sales associates with salaries between $27,500 and $37,500.
c. Use the empirical rule to determine the percentage of sales associates with salaries less than $27,500.
d. Still suppose that the distribution of annual salaries for sales associates at this store is bell-shaped. A sales associate makes $42,000. Should this salary be considered an outlier? Explain.

In: Statistics and Probability

1. The empirical rule says that 95% of the population is within 2 standard deviations of...

1.
The empirical rule says that 95% of the population is within 2 standard deviations of the mean, but when I find the z-scores that mark off the middle 95% of the standard normal distribution I calculate -1.96 and 1.96. Is this a contradiction? Why or why not? In other words why are the normal distribution calculators not agreeing with the empirical rule? [2 sentences]

2.
Answer the following:

What is a sampling distribution?
[2 sentences]

What is the Central Limit Theorem?
[2 sentences]

What is the effect of increasing sample size on a sampling distribution? [1 sentence]

Why is the standard deviation of the sampling distribution smaller than the standard deviation of the population from which it came?
[1 sentence]

In: Math

The mean time to assemble a piece of furniture is 52 minutes. Suppose the the assembly...

The mean time to assemble a piece of furniture is 52 minutes. Suppose the the assembly times are normally distributed with a standard deviation of 4.3 minutes. What percentage of assembly times fall between 47.7 minutes and 56.3 minutes?

Use the Empirical Rule

Question 1 options:

95%

68%

16%

99.7%

question 2

A survey found that the mean retail price per litre of premium grade gasoline is $1.89. Suppose the retail prices per litre are normally distributed with a standard deviation of $0.18. Between what two prices do 68% of the prices per litre fall?

Use the Empirical Rule

Question 2 options:

$1.71 and $2.25

$1.35 and $2.43

$1.71 and $2.08

$1.53 and $2.25

QUESTION 3

The mean time to assemble a piece of furniture is 52 minutes. Suppose the the assembly times are normally distributed with a standard deviation of 4.3 minutes. What percentage of assembly times fall below 39.1 minutes?

Use the Empirical Rule

Question 3 options:

2.5%

99.7%

16%

0.15%

QUESTION 4 A survey found that on average adults sleep 6.8 hours per night. Suppose that the hours per night are normally distributed with a standard deviation of 1.3 hours. 16% of the times are above what value?

Use the Empirical Rule

Question 4 options:

9.4 hours

8.1 hours

2.9 hours

10.7 hours

QUESTION 5

The mean time to assemble a piece of furniture is 43 minutes. Suppose the the assembly times are normally distributed with a standard deviation of 3.7 minutes. What percentage of assembly times are above 50.4 minutes?

Question 5 options:

95%

16%

2.5%

0.15%

In: Statistics and Probability

250 word minimum Every big company has in-house experts. So why do they not use them...

250 word minimum

Every big company has in-house experts. So why do they not use them more? Search systems that apply social-computing tools such as internal blogs, wikis, and social networks can fill these critical gaps. Posted comments and communication between users help reveal not only who knows what but who is approachable. Cemex (www.cemex.com/AboutUs/ OurApproach.aspx) invited 400 employees involved with its ready-mix products to help figure out which products worked best and which were redundant. The result is a slimmed-down product line offered in a constantly updated catalog available globally.

In: Economics