You ask a small sample of 5 students what percentage score they obtained in a recent exam and howmany hours they spent preparing for the exam. The data you obtained is summarised in the tablebelow.Time spent studying (hours)1018111319Answer:Exam score (out of 100)5276645594You fit a least squares line to the data which can be used to predict exam scores from the time spentstudying. You wish to conduct a statistical test to obtain evidence that the true population slope isgreater than zero. You are going to conduct the test at the .10 level of significance. Find the criticalvalue of the test statistic. (Provide your answer as a number rounded to 3 decimal places; youranswer must be accurate within +0.0005.)

The independent variable is Time spent studying. The dependent variable is Exam score. We have to…

Answered: You ask a small sample of 5 students…

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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Part 2 For the following set of scores, compute standard scores (z-scores). Do it using SPSS. Don't forget that the initial output will only show the output window. You will have to switch back to Data View. Scores 18 19 15 20 25 31 17 35 27 22 34 29 40 33 21 Z- Scores
Using the data from the table Disease or illness less than $35,000 $35,000 - 49,999 $50,000 - 74,999 $75,000 - 99,999 $100,000 or more Coronary heart disease 8.1 6.5 6.3 5.3 4.9 Stroke 3.9 2.5 2.3 1.8 1.6 Emphysema 3.2 2.5 1.4 1.0 0.8 Chronic bronchitis 6.3 4.0 4.4 2.2 2.4 Diabetes 11.0 10.4 8.3 5.6 5.9 Ulcers 8.7 6.7 6.5 4.7 4.4 Kidney disease 3.0 1.9 1.3 0.9 0.9 Liver disease 2.0 1.6 1.0 0.6 0.7 Chronic arthritis 33.4 30.3 27.9 27.4 24.4 Hearing trouble 17.2 16.0 16.0 16.2 12.4 Vision trouble 12.7 9.8 7.5 5.7 6.6 No teeth 11.6 7.8 5.5 4.2 4.1 A) create a line graph plotting Annual family income on the x-axis and prevalence of disease or illness on the y-axis. Include all data points for each disease on the same chart ( i.e.? plot the prevalence for each disease or illness as it's own line on a single chart) B) do any of the chronic disease in the table appear to have a dose-response relationship to annual family income? Justify your…
Check for accuracy and respond the last questions 2. For this problem, use Chapter 11 Data Set 3. We want to know if urban and rural residents both have the same attitude toward gun control. a. What is the null hypothesis? The null hypothesis concludes that there is no difference in attitudes toward gun control between urban and rural residents. b. What is the research hypothesis? The research hypothesis suggests that there is a difference in attitudes toward gun control between urban and rural residents. c. Will you be conducting a one-tailed or a two-tailed test? Why? In this case I would conduct a two-tailed test because i’m interested in whether there is a difference in attitudes toward gun control between urban and rural residents, regardless of which direction that difference follows. e.- What is the p-value (hint: it is under “sig” in the output table)? The P-value is 0.44. Do you reject the null hypothesis or fail to reject the null? What do you conclude about urban and…
d and e only
2. This is a sample of 10 random seasons in the National Hockey League, Wayne Gretzky scored 50% more points than anyone who ever played professional hockey. He accomplished this amazing feat while playing in 280 fewer games than Gordie Howe, the previous record holder. Here are the number of games Gretzky played during each season. 45 70 73 73 74 78 79 80 80 82 e. What is the shape of the data?f. What is the best measure of center and spread to use for this data set
Problem #1: A researcher claims that 25% of individuals aged 15-30 actually like to eat vegetables. In order to test this claim, a random sample of 200 individuals within the specified age group was taken revealing 21% saying "Yes, I like to eat vegetables." 1. Taking p = 0.25 to be the hypothesized value of the population proportion, which of the following is the value of the test statistic z?
The boxplot below shows salaries for CPAS and Actuaries in a town. СРА Actuary 20 30 40 50 60 70 80 90 100 110 Salary (thousands of $) If a person is making the third quartile salary for a CPA, they are making less than % of Actuaries.
Biologists caught and measured 215 fish from the northern Atlantic Ocean. The lengths of the fish (in cm) are summarized in the histogram. 40 35 30 25 20 15 10 5 15 30 45 60 75 90 105 120 length of fish (cm) About what percentage of fish caught in this study had lengths between 45 cm and 75 cm? % Frequency
3
In the real world, what kinds of data are distributed in the shape of a bell curve? Cite examples of how the Bell Curve has been used that you think are good, or bad, or neutral.
In this problem, we explore the effect on the mean, median, and mode of adding the same number to each data value. Consider the data set 4, 4, 5, 8, 12. (a) Compute the mode, median, and mean. (Enter your answers to one decimal place.) mode median mean (b) Add 3 to each of the data values. Compute the mode, median, and mean. (Enter your answers to one decimal place.) mode median mean
A recent study evaluated how addicted teenagers become to nicotine once they start smoking. The response variable was the number of yes answers on a questionnaire called the Hooked on Nicotine Checklist (HONC). Of teenagers who had tried tobacco, the mean HONC score was 4.2 (s = 5.4) for the 149 females and 2.8 (s=4.2) for the 190 males. Complete parts a through c below. 000 DOD F4 What does the standard error indicate? A. The standard error describes the spread of the sampling distribution of x₁ - x₂. B. The standard error is the standard deviation of the difference between x₁ - x₂. OC. The standard error is the standard deviation of the sample for this study. OD. The standard error is the difference in standard deviations for the two populations. ... b. Find the test statistic and P-value for Ho: H₁ H₂ and Ha: H₁ H₂. Interpret, and explain what (if any) effect gender has on the mean HONC score. Use the significance level 0.05. The test statistic is (Round to two decimal places as…

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