Miami Dade College

Math - Others

Basic Math Solutions

You are evaluating the historical performance of a fund with the following annual returns: Year1 0.11 Year2 0.144 Year3 0.153 Year4 0.096 What would your expected return be for this fund next year using an arithmetic mean? O 0.1328 O 0.1502 O 0.1258 O 0.1437 O 0.1390

Math - Others

Linear Programming Solutions

You are considering a risky investment that you expect will either be worth 90,000 in 1 year, or 35,000, with probabilities of 0.65 and 0.35 for each outcome, respectively. You could invest in riskless T-bills at 0.057. If you invest in this risky investment, you would expect to earn a risk premium of 0.078 What is the expected return on this investment? O 0.135 O 0.142 O 0.112 O 0.120 O 0.129

Algebra

Quadratic equations Solutions

Solve W= 2XY + 2XZ for X. X=_____

Algebra

Quadratic equations Solutions

Solve the polynomial equation by factoring and the 48x - 16 = 3x³ -x² Find the solution set. Select the correct choice below A) The solution set is { } (Use a comma to separate answers as needed) B) There is no solution.

Macroeconomics

Financial Sector Solutions

You are considering a new supplier that you estimate would reduce your costs 0.009, increasing overall EBIT margin the same amount, or 90 basis points. Using 5-way DuPont ratios, what would be the ROE after the changes are made? Net income 7.825 Pretax profit 9.428 EBIT 11.934 Total Sales 132.6 Avg Assets 78 Avg Equity 60 A)0.1336 B) 0.1308 C)0.1435 D) 0.1396 E)0.1280

Microeconomics

Basic Economic Concepts Solutions

When examining the returns of securities, standard deviation is a measure of

Math

Statistics Solutions

Child Health and Development Studies (CHDS) has been collecting data about expectant Type numbers in the boxes. mothers in Oakland, CA since 1959. One of the measurements taken by CHDS is the weight 10 points increase in pounds) for expectant mothers in the second trimester. In a fictitious study, suppose that CHDS finds the average weight increase in the second trimester is 14 pounds. Suppose also that, in 2015, a random sample of 36 expectant mothers have mean weight increase of 15.7 pounds in the second trimester, with a standard deviation of 5.8 pounds. A hypothesis test is done to see if there is evidence that weight increase in the second trimester is greater than 14pounds. Find the p-value for the hypothesis test. ▭ The p-value should be rounded to 4 decimal places.

Math

Statistics Solutions

In a fictional study, suppose that a psychologist is studying the effect of daily meditation on resting heart rate. The psychologist believes the patients who not meditate have a higher10 points resting heart rate. For a random sample of 45 pairs of identical twins, the psychologist randomly assigns one twin to one of two treatments. One twin in each pair meditates daily for one week, while the other twin does not meditate. At the end of the week, the psychologist measures the resting heart rate of each twin. Assume the mean resting heart rate is 80 heart beats per minute. The psychologist conducts a T-test for the mean of the differences in resting heart rate of patients who do not meditate minus resting heart rate of patients who do meditate. Which of the following is the correct null and alternative hypothesis for the psychologist's study? A. H₀: µ = 80; Ha: µ > 80 B. H₀: µ= 0; Ha: µ≠0 C. H₀: µ = 0; Ha: µ > 0

Math

Statistics Solutions

In March 2015, the Public Policy Institute of California (PPIC) surveyed 7,525 likely voters living in California. In the survey, respondents were asked about global warming. PPIC results show that 47% of adults age 55 and older view global warming as a serious problem, and 65% of adults age 18 to 34 view global warming as a serious problem. PPIC researchers are interested in the difference in proportions of adults age 55 and over and adults age 18 to 34. The standard error for the difference in proportions is 0.011. Which of the following is the margin of error for a 95% confidence interval? (A) 0.01 (B) 0.018 (C) 0.021 (D) 0.028

Math

Statistics Solutions

According to a 2014 research study of national student engagement in the U.S., the average college student spends 17 hours per week studying. A professor believes that students at her college study less than 17 hours per week. The professor distributes a survey to a random sample of 80 students enrolled at the college. From her survey data the professor calculates that the mean number of hours per week spent studying for her sample is: 7= 15.6 hours per week with a standard deviation of s = 4.5 hours per week. The professor chooses a 5% level of significance. What can she conclude from her data? (A)The data supports the professor's claim. The average number of hours per week spent studying for students at her college is less than 17 hours per week. (B)The professor cannot conclude that the average number of hours per week spent studying for students at her college is less than 17 hours per week. The sample mean of 15.6 is not significantly less than 17. (C) Nothing. The conditions for use of a t-model are not met. The professor cannot trust that the p-value is accurate for this reason.

Anatomy and Physiology

Nervous System Solutions

If you bred a line of designer rats lacking vmPFCs, which of these do you think would be impaired/absent/different in these animals? a) a conditioned emotional response becoming extinct (no longer being afraid of bell) b)a fear response (freezing) being displayed c)motor responses d) a conditioned emotional response being learned (pairing of bell & shock)

Anatomy and Physiology

Head and Neck Solutions

What part of your brain is responsible for taking a stream of sound like "cantaloupe" as said by a little kid and analyzing it into the units "can-ta-loop" and figuring out that it refers to the same thing as the stream of sound "cantaloupe" said by someone with a very deep voice? a) Wernicke's area b)visual word form area c)Broca's area d) arcuate fasciculus