= 47810Withdrawal symptoms may occur when a person using a painkiller stops using it. For a certain, widely taken painkiller, withdrawal symptoms occur in 12% ofpeople who have stopped using the painkiller. Suppose that we will take a random sample of 8 people who have stopped using the painkiller. Let p representthe proportion of people from the sample who experienced withdrawal symptoms. Consider the sampling distribution of the sample proportion p.Complete the following. Carry your intermediate computations to four or more decimal places. Write your answers with two decimal places, rounding ifneeded.(a) Find un (the mean of the sampling distribution of the sample proportion).HA = ||(b) Find on (the standard deviation of the sampling distribution of the sample proportion).

Given: The proportion of people who have stopped using painkillers (p)=12/100 Sample size(n)= 8 The…

Answered: 4 7 8 9. 10 Withdrawal symptoms may…

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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The increasing annual cost (including tuition, room, board, books, and fees) to attend college has been widely discussed.† The following random samples show the annual cost of attending private and public colleges. Data are in thousands of dollars. Private Colleges Public Colleges 53.8 43.2 46.0 32.3 44.0 20.3 22.0 28.2 15.6 24.1 28.5 30.6 44.8 36.8 50.5 43.0 22.8 25.8 18.5 25.6 14.4 21.8 (a) Compute the sample mean (in thousand dollars) and sample standard deviation (in thousand dollars) for private colleges. (Round the standard deviation to two decimal places.) sample mean $ thousand sample standard deviation 2$ thousand Compute the sample mean (in thousand dollars) and sample standard deviation (in thousand dollars) for public colleges. (Round the standard deviation to two decimal places.) sample mean %24 thousand sample standard deviation %$4 thousand
10. Gasoline prices. The Table 7 shows the gasoline prices (in dollars) for a sample of service stations. The prices are classified by vendor. At a = 0.05, is there enough evidence to conclude that at least 1 population mean gasoline price is different from the others? Table 7. Gasoline Prices (Dollars) Stewarts Valero Sunoco 2.50 2.52 2.51 2.51 2.51 2.51 2.50 2.51 2.53 2.53 2.51 2.50 2.49 2.52 2.50 2.53 2.52
. Myers-Briggs: Actors Isabel Briggs Myers was a pioneer in the study of personality types. The following information is taken from MBTI Manual: A Guide to the Development and Use of the Myers-Briggs Type Indicator by Myers and McCaulley (Consulting Psychologists Press). In a random sample of 62 professional actors, it was found that 39 were extroverts. Let p represent the proportion of all actors who are extroverts. Find a point estimate for p. Find a 95% confidence interval for p. Give a brief interpretation of the meaning of the confidence interval you have found. Check Requirements Do you think the conditions np > 5 and nq > 5 are satisfied in this problem? Explain why this would be an important consideration.
Q8. Please help.
The Census Bureau gives this distribution for the number of people in American households in 2016. Family size 1 2 4 6. 7 Proportion 0.28 0.35 0.15 0.13 0.06 0.02 0.01 Note: In this table, 7 actually represents households of size 7 or greater. But for purposes of this exercise, assume that it means only households of size exactly 7. Suppose you take a random sample of 4000 American households. About how many of these households will be of size 2? Sizes 3 to 7? The number of households of size 2 is about The number of households of size 3 to 7 is about
Like father, like son: In 1906, the statistician Karl Pearson measured the heights of 1078 pairs of fathers and sons. The following table presents a sample of 6 pairs, with height measured in inches, simulated from the distribution specified by Pearson. Father's Son's height height 70.8 69.8 70.7 70.1 73.3 73.6 76.5 65.7 72.4 71.0 Part: 0 / 4 70.9 Send data to Excel Part 1 of 4 69.1 The least-squares regression line y = b + b₁ x = 47.8026+0.3397x and Σ (x-x)² = 36.5350 are known for this data. Use the critical value method to test H₂ :B₁ = 0 versus H₁ :B₁ +0. Can you conclude that the father's height is useful in predicting the son's height? Use the α = 0.01 level of significance. Find the critical value(s). Round the answer to three decimal places. If there is more than one critical value, separate them with commas. Critical value(s): 0,0,...
Like father, like son: In l1906, the statistician Karl Pearson measured the heights of 1078 pairs of fathers and sons. The following table presents a sample of 8 pairs, with height measured in inches, simulated from the distribution specified by Pearson. Father's Son's height height 70.8 69.8 70.7 71.0 72.3 71.9 69.3 71.4 70.1 73.3 69.0 69.1 73.6 76.5 69.1 71.8 Send data to Excel 2 The least-squares regression line y =b,+b,x=4.3121+0.9565x and E (x- ) = 18.6888 are known for this data. Use the critical value method to test Ho:B, =0 versus H, : B, >0. Can you conclude that the father's height is useful in predicting the son's height? Use the a=0.01 level of significance. Part: 0 / 4
Researchers were interested in assessing whether stress levels are different at the beginning of the semester compared to finals week. To test this, stress was measured in 5 students at the start of the semester and then again at the end of the semester during finals week. Participant Stress 1 Stress 2 1 22 22 2 32 34 3 24 25 4 28 30 5 26 29 What test should be used to test for differences in stress at these two time-points? Select one: a. paired samples t-test b. independent samples t-test c. Pearson correlation d. single sample t-test
Movie critics claim that 68% of adults and 79% of teenagers would recommend seeing the newest action movie. Suppose random samples of 43 adults and 52 teenagers are selected. Let and be the sample proportions of adult and teenage moviegoers, respectively, who would recommend this movie. Which of the following is the mean of the sampling distribution of ? –0.11 0.11 0.74 1.47
Need crit value, the pictured question b, and rejection region.
Imagine a researcher asks a sample of five people to drive two types of cars and rate each of them on a scale of 1 to 25. The researcher wants to know: Is there is a difference in the ratings of the two types of cars. Below are the data collected: Type A: 20, 10, 11, 23, 7 Type B: 10, 11, 4, 12, 1 what type of T Test would be appropriate
5.50 Watching live television. A survey of 442 people aged 18 to 29 revealed that 30% watch live television every day.25 You take a random sample of 20 undergraduates from your university and ask them whether they watch live TV every day. If their rate matches the 30% rate: a. What is the distribution of the number of students who say they watch live television every day? b. What is the distribution of the number of students who say that they do not watch live television every day? c. What is the probability that no more than 2 of the 20 students in your sample say that they watch live television every day?

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