The post-lunch dip is the drop in mental alertness after a midday meal. Does an extract of the leaves of the ginkgo tree reducethe post-lunch dip? Assign healthy people aged 18 to 40 years to take either ginkgo extract or a placebo pill. After lunch, askthem to read seven pages of random letters and place an X over every e. Count the number of misses per line read.M. K. Pawlik, "The effect of ginkgo biloba on the post-lunch dip and chemosensory function," MS thesis, Purdue University, 2002.What is a placebo and why was one group given a placebo?A placebo is a treatment pill that is presented to the individuals as a control treatment.A placebo is a lower-strength version of the pill that allows researchers to account for any physiological effect of takingthe pill.O A placebo is an inert pill that allows researchers to account for any psychological effect of taking the pill.A placebo is a different pill that allows researchers to account for any variational effect of taking the other pill.

In this case, healthy people aged 18 to 40 years take either gingko extract or a placebo pill.

Answered: The post-lunch dip is the drop in…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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QUESTION 2 Elaine rolls a 20-sided die a total of 7 times. Her results are given below: Need undogh answe? watA Cines 20 5 18 8 7 6 20 a. What is the range? Explain your answer. range = explain: b. Determine the mean of Elaine's die rolls by using the formula for mean. Make sure to explain your answer or show your work. rea X = explain: c. Complete the table below. data value deviation deviation squared 20 8 64 20 8 64 18 6. 36 8 4 16 7 -5 25 6. -6 36 -7 49 Total: 290 d. Using your work from c., determine the sample standard deviation to the nearest hundredth. Explain your answer. S = 48.33 explain:
Do various occupational groups differ in their diets? A British study of this question compared 98 drivers and 83 conductors of London double-decker buses. The conductors' jobs require more physical activity. The article reporting the study gives the data as "Mean daily consumption (+ se)." Some of the study results appear below. Drivers Conductors Total calories 2821 44 2844 +48 Alcohol (grams) 0.24 0.06 0.39 ± 0.11 que Construct a 95% confidence interval for the mean daily alcohol consumption of London double-decker bus conductors. Follow the Inference Toolbox.
Determine whether the underlined value is a parameter or a statistic. a. In 2017 national survey on teenager pregnancies, 10% of respondents aged 14 to 17 reported that they have a child before the age of 16 yrs. ______________ b. Michael Jordan is one of the legendary basketball players has an average of 30.1 pts, 6.2 rebounds, and 5.3 assists in 1072 regular season games. ______________ c. A study of 1000 adults in public rest rooms (in Metro Manila) found that 30% did not wash their hands before exiting. ______________ d. Interview of 200 adults 18 years of age or older, conducted nationwide, found that 46% could state the minimum age required for the office of Philippine president. ______________
The accompanying data represent the wait time (in minutes) for a random sample of 40 visitors to a popular attraction in a large amusement park. Use the sample data to complete parts (a) through (d). Click the icon to view the data for wait times. (Data table and histogram graphs attached)
During one shift, the express lane clerk recorded how many times customers violated the "10 items or less" rule for his lane. In particular, he recorded how many items over the limit each violator placed on the conveyor belt. This data is summarized in the histogram below. NOTE: The last class actually represents "7 or more items," not just 7 items. Frequency 12+ 298 ans = 10- a 2 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 # items over 10 What is the frequency of times the limit was exceeded by at least 3 items?
pls answer G on paper
Please read the passage of the organic effect. And then, answer the questions carefullly to get the correct answers.
can you please help me with my stats homework?
The data below represent the number of days absent, x, and the final grade, y, for a sample of college students at a large university. Complete parts (a) through (e) below. У, No. of absences, x 1 2 4 6. 7 8 9. Final grade, y 88.8 85.9 83.0 80.6 77.7 73.3 63.5 68.3 65.4 62.6 (Round to three decimal places as needed.) A. For every unit change in the final grade, the number of days absent falls by days, on average. B. For every day absent, the final grade falls by on average. C. For zero days absent, the final score is predicted to be 88.778 . D. For a final score of zero, the number of days absent is predicted to be days. E. It is not appropriate to interpret the y-intercept. (c) Predict the final grade for a student who misses five class periods and compute the residual. Is the observed final grade above or below average for this number of absences? The predicted final grade is |. This observation has a residual of, which indicates that the final grade is average. (Round to one decimal…
assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit swer. mment Scoring pest submission for each question part is used for your score. DETAILS PREVIOUS ANSWERS ASWSBE13 13.E.009.MI. MY NOTES ASK YOUR TEACHER PRACTICE A You may need to use the appropriate technology to answer this question. To study the effect of temperature on yield in a chemical process, five batches were produced at each of three temperature levels. The results follow. Temperature 50°C 60°C 70°C 35 29 22 25 32 28 35 33 27 38 22 29 27 34 34 Construct an analysis of variance table. (Round your values for MSE and F to two decimal places, and your p-value to four decimal places.) Мean Source of Variation Sum of Squares Degrees of Freedom F p-value Square Treatments 12 Error 14 Total Use a 0.05 level of significance to test whether the temperature level has an effect on the mean yield of the process. State the null and alternative…
Researchers wondered whether the size of a person's brain was related to the individual's mental capacity. They selected a sample of 5 females and 5 males and measured their MRI image pixel counts and IQ scores. Females Males MRI IQ MRI IG The data is reported to the right. Complete parts (a) through (d) below 139 858,472 140 955,003 935,494 924,059 1.079.550 1,001.121 Click the icon to view the critical values table. 991,305 138 141 857,782 833,868 790,619 133 135 132 141 135 140 AMRI 1,080,000- AIO 145 AIO 145- AMRI 1,080,000 780,000 130 130 780,000 130 780,000 780,000 130 1,080,000 145 1,080,000 MRI 145 MRI (b) Compute the linear correlation coefficient between MRI count and IQ. Are MRI count and IQ linearly related? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round to three decimal places as needed.) A. Yes, MRI count and IQ are linearly related since the linear correlation coefficient is O B. No. MRI count and IQ are not…
Do various occupational groups differ in their diets? A British study of this question compared 98 drivers and 83 conductors of London double-decker buses. The conductors' jobs require more physical activity. The article reporting the study gives the data as "Mean daily consumption (+ se)." Some of the study results appear below. Drivers Total calories 2821 +44 Alcohol (grams) 0.24 0.06 Conductors 2844 +48 0.39 ± 0.11 Construct a 99% confidence interval for the difference in mean daily alcohol consumption between drivers and conductors.

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