Refer to the graphs, in which the numbers in parentheses near the AD1, AD2, and AD3 labels indicate the level of investment spending associated with each curve. All figures are in billions. The economy is at point Y on the investment demand curve. Given these conditions, what policy should the Fed pursue to achieve a noninflationary, full-employment level of real GDP?

A) increase aggregate demand from AD3 to AD2.

B) decrease the money supply from $225 to $150 billion.

C) increase interest rates from 4 to 8 percent.

D) make no change in monetary policy.

Does it take more time for seeds to germinate if they are near rock music that is continuously playing compared to being near classical music? The 53 seeds that were exposed to rock music took an average of 20 days to germinate. The standard deviation was 13 days. The 45 seeds that were exposed to classical music took an average of 15 days to germinate. The standard deviation for these seeds was 7 days. What can be concluded at the α = 0.01 level of significance?

For this study, we should use

The null and alternative hypotheses would be: H 0 : (please enter a decimal) H 1 : (Please enter a decimal)

The test statistic = (please show your answer to 3 decimal places.)

The p-value = (Please show your answer to 4 decimal places.)

The p-value is α

Based on this, we should the null hypothesis.

Thus, the final conclusion is that ...

The results are statistically significant at α = 0.01, so there is sufficient evidence to conclude that the mean germination time for the 53 seeds exposed to rock music that were observed is more than the mean germination time for the 45 seeds that were exposed to classical music that were observed.

The results are statistically insignificant at α = 0.01, so there is statistically significant evidence to conclude that the population mean time for seeds exposed to rock music to germinate is equal to the population mean time for seeds exposed to classical music to germinate.

The results are statistically significant at α = 0.01, so there is sufficient evidence to conclude that the population mean time for seeds exposed to rock music to germinate is more than the population mean time for seeds exposed to classical music to germinate.

The results are statistically insignificant at α = 0.01, so there is insufficient evidence to conclude that the population mean time for seeds exposed to rock music to germinate is more than the population mean time for seeds exposed to classical music to germinate.

Interpret the p-value in the context of the study.

There is a 0.89% chance that the mean germination time for the 53 seeds exposed to rock music is at least 5 days more than the mean germination time for the 45 seeds exposed to classical music.

There is a 0.89% chance of a Type I error.

If the population mean time for seeds exposed to rock music to germinate is the same as the population mean time for seeds exposed to classical music to germinate and if another 53 seeds exposed to rock music and 45 seeds exposed to classical music are observed then there would be a 0.89% chance that the mean germination time for the 53 seeds exposed to rock music would be at least 5 days more than the mean germination time for the 45 seeds exposed to classical music.

If the sample mean germination time for the 53 seeds exposed to rock music is the same as the sample mean germination time for the 45 seeds exposed to classical music and if another 53 seeds exposed to rock music and 45 seeds exposed to classical music are observed then there would be a 0.89% chance of concluding that the mean germination time for the 53 seeds exposed to rock music is at least 5 days more than the mean germination time for the 45 seeds exposed to classical music

Interpret the level of significance in the context of the study.

If the population mean time for seeds exposed to rock music to germinate is the same as the population mean time for seeds exposed to classical music to germinate and if another 53 seeds exposed to rock music and 45 seeds exposed to classical music are observed then there would be a 1% chance that we would end up falsely concuding that the population mean time for seeds exposed to rock music to germinate is more than the population mean time for seeds exposed to classical music to germinate

There is a 1% chance that there is a difference in the population mean time for seeds exposed to rock vs. classical music to germinate.

If the population mean time for seeds exposed to rock music to germinate is the same as the population mean time for seeds exposed to classical music to germinate and if another 53 seeds exposed to rock music and 45 seeds exposed to classical music are observed, then there would be a 1% chance that we would end up falsely concuding that the sampe mean times to germinate for these 53 seeds exposed to rock music and 45 seeds exposed to classical music differ from each other.

There is a 1% chance that the seeds just don't like your taste in music, so please let someone else conduct the study.

Near the endpoint, the red color of the silver chromate forms, but then disappears, as you swirl. This is because the Ksp of silver chromate may be temporarily exceeded locally (where the silver nitrate is added), but as you swirl, the chloride ions still in solution convert the silver chromate into silver chloride. Write an equation for this process, (the process of converting the silver chromate into white silver chloride) and calculate the equilibrium constant of the reaction in terms of the solubility products of silver chloride and silver chromate.

Ksp = 1.6 x 10-10 for AgCl Ksp = 1.1 x 10-12 for Ag2CrO4

b.   Assume the chromate concentration of indicator in the flask is 0.0050 M. What is the concentration of Cl- remaining in the flask when silver chromate first precipitates (that is, at the endpoint of the titration).

c.   What percentage of the Cl- in the original unknown remains when the endpoint is reached? You should use your answer to question 2, and estimate the volume of solution in the flask.

Assuming the elastic solution for the stresses near a crack tip is valid in the case of small-scale yielding, determine r_p(q) for Mode I and Mode II  in plane stress and plane strain. Plot a nondimensional r_p(q), ( r_p/ r_p(Irwin)) in the vicinity of the crack tip for several different values of Poisson's ratio.

Does it take less time for seeds to germinate if they are near rock music that is continuously playing compared to being near classical music? The 42 seeds that were exposed to rock music took an average of 28 days to germinate. The standard deviation was 14 days. The 53 seeds that were exposed to classical music took an average of 34 days to germinate. The standard deviation for these seeds was 12 days. What can be concluded at the αα = 0.05 level of significance?

For this study, we should use Select an answer t-test for the difference between two independent population means t-test for the difference between two dependent population means t-test for a population mean z-test for the difference between two population proportions z-test for a population proportion

The null and alternative hypotheses would be:   

H0:H0:  Select an answer μ1 p1  Select an answer = < ≠ >  Select an answer p2 μ2  (please enter a decimal)   

H1:H1:  Select an answer p1 μ1  Select an answer > ≠ = <  Select an answer p2 μ2  (Please enter a decimal)

The test statistic ? z t  =  (please show your answer to 3 decimal places.)

The p-value =  (Please show your answer to 4 decimal places.)

The p-value is ? > ≤  αα

Based on this, we should Select an answer fail to reject reject accept  the null hypothesis.

Thus, the final conclusion is that ...

The results are statistically insignificant at αα = 0.05, so there is insufficient evidence to conclude that the population mean time for seeds exposed to rock music to germinate is less than the population mean time for seeds exposed to classical music to germinate.

The results are statistically insignificant at αα = 0.05, so there is statistically significant evidence to conclude that the population mean time for seeds exposed to rock music to germinate is equal to the population mean time for seeds exposed to classical music to germinate.

The results are statistically significant at αα = 0.05, so there is sufficient evidence to conclude that the population mean time for seeds exposed to rock music to germinate is less than the population mean time for seeds exposed to classical music to germinate.

The results are statistically significant at αα = 0.05, so there is sufficient evidence to conclude that the mean germination time for the 42 seeds exposed to rock music that were observed is less than the mean germination time for the 53 seeds that were exposed to classical music that were observed.

Interpret the p-value in the context of the study.

There is a 1.5% chance that the mean germination time for the 42 seeds exposed to rock music is at least 6 days less than the mean germination time for the 53 seeds exposed to classical music.

There is a 1.5% chance of a Type I error.

If the population mean time for seeds exposed to rock music to germinate is the same as the population mean time for seeds exposed to classical music to germinate and if another 42 seeds exposed to rock music and 53 seeds exposed to classical music are observed then there would be a 1.5% chance that the mean germination time for the 42 seeds exposed to rock music would be at least 6 days less than the mean germination time for the 53 seeds exposed to classical music.

If the mean germination time for the 42 seeds exposed to rock music is the same as the sample mean germination time for the 53 seeds exposed to classical music and if another 42 seeds exposed to rock music and 53 seeds exposed to classical music are observed then there would be a 1.5% chance of concluding that the mean germination time for the 42 seeds exposed to rock music is at least 6 days less than the mean germination time for the 53 seeds exposed to classical music

Interpret the level of significance in the context of the study.

If the population mean time for seeds exposed to rock music to germinate is the same as the population mean time for seeds exposed to classical music to germinate and if another 42 seeds exposed to rock music and 53 seeds exposed to classical music are observed, then there would be a 5% chance that we would end up falsely concuding that the sampe mean times to germinate for these 42 seeds exposed to rock music and 53 seeds exposed to classical music differ from each other.

There is a 5% chance that there is a difference in the population mean time for seeds exposed to rock vs. classical music to germinate.

If the population mean time for seeds exposed to rock music to germinate is the same as the population mean time for seeds exposed to classical music to germinate and if another 42 seeds exposed to rock music and 53 seeds exposed to classical music are observed then there would be a 5% chance that we would end up falsely concuding that the population mean time for seeds exposed to rock music to germinate is less than the population mean time for seeds exposed to classical music to germinate

There is a 5% chance that the seeds just don't like your taste in music, so please let someone else conduct the study.

The owner of Gino’s Pizza restaurant chain believes that if a restaurant is located near a college campus, then there is a linear relationship between sales and the size of the student population. Suppose data are collected from a sample of n = 10 Gino’s Pizza restaurants located near college campuses with the following reported sample statistics:

We want to find the equation of the least-squares regression line predicting quarterly pizza sales (y) from student population (x).

1. Develop a 95% confidence interval estimate for β₁.

2. Test for the Significance of β₁. Use α = 0.05

3. Use an F-test to determine if the regression model is significant.

4. Compute the R² and interpret.

A student in a noon calculus class is watching two bugs near the center of a wall. One is an ant and the other is a beetle. At noon, the ant is 180 cm directly to the left of the beetle. The ant is crawling right at 30 cm/h and the beetle is crawling up at 45 cm/h. How fast is the distance between the bugs changing at 2:00 PM? Answer with an exact value. cm/h?

On a clear day the electric field in the atmosphere near the earth's surface is 100 N/C, directed vertically downward. (a) If we adopt the convention that the potential at the earth's surface is 0, what is the potential 492 m above the surface? (b) What is the potential at the top of Pike's Peak, 14,110 ft above sea level? (Hint: Do not assume that the surface in part (a) is at sea level.) Explain.