Create real life problem situations in psychological field that illustrates the use of each of the following probability and non- probability sampling techniques. 4. Snowball Sampling
Q: “Chips Ahoy! 1,000 Chips Challenge.” Students in an introductory statistics course at the U.S. Air…
A: The students concluded that the number of chips per bag is approximately normally distributed to…
Q: A researcher studying public opinion of proposed Social Security changes obtains a simple random…
A: a simple random sample of 30 adult Americans n = 30
Q: What is the main distinction between probability sampling and non-probability sampling? A.…
A: Random selection: a process in which every unit has equal chance of getting selected is known as…
Q: Refer to the following scenario. A government official is in charge of allocating social programs…
A: n=130 X=Number of people whose annual income lies below poverty line. = 22
Q: A researcher studying public opinion of proposed Social Security changes obtains a simple random…
A: Given information- We have given that 20% of all adult Americans support the changes. So, p = 0.20 q…
Q: Refer to the following scenario. A government official is in charge of allocating social programs…
A: Sample size n=130 Number of successes x=25 Confidence level is 95% i.e., 0.95. Significance level…
Q: The expected observations for this table would be Category Population #1 Population #2 A B
A: We have given that the data of two different populations with two characteristics A and B.
Q: Matrimony Monthly is a top-selling magazine that provides information for couples thinking about…
A:
Q: A researcher studying public opinion of proposed Social Security changes obtains a simple random…
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Q: A researcher studying public opinion of proposed Social Security changes obtains a simple random…
A:
Q: A researcher studying public opinion of proposed Social Security changes obtains a simple random…
A: The distribution is approximately normal if np(1-p)≥10.
Q: . A local university surveyed a large random sample of students at the end of their freshmen year in…
A: In statistics, generalization refers to the process of applying the results or findings from a study…
Q: Matrimony Monthly is a top-selling magazine that provides information for couples thinking about…
A: To find: Missing values in the given table
Q: As a project for her statistics class, a college student is interested in knowing what proportion of…
A: As a project for her statistics class, a college student is interested in knowing what proportion of…
Q: A researcher studying public opinion of proposed Social Security changes obtains a simple random…
A: Given that n =30 and p=0.20.
Q: a) Test at the 1% significance level if there is a change in the academic performance of students…
A: Here AS PER POLICY I HAVE CALCULATED 3 SUBPART PLZ REPOST FOR REMAINING PARTS
Q: n the 2004 election in Utah, 66% of all Utah voters voted for Amendment 3, the marriage amendment.…
A: The sampling distribution of a statistic will be similar for all possible samples of the same size…
Q: The contingency table for a sample of corporate executives classified by educational level and the…
A: Given that Above average Average Below average Total College 30 20 10 60 High school…
Q: The following graphs show the sampling distributions for two different point estimators, X and Y, of…
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Q: Question 1. In a random and independent sample of 1000 students 80% of them were in favor of longer…
A: The formula of the expected proportion is,
Q: p-hat, the sample proportion of adults who respond yes, is approximately normal, how many more…
A: Given thatthe sample proportion of adults who respond yes is approximately normalUsing the formula…
Q: Refer to the following scenario. A government official is in charge of allocating social programs…
A: From the provided information, Sample size (n) = 123 From which 21 have an annual income that is…
Q: Refer to the following scenario. A government official is in charge of allocating social programs…
A: Refer to the following scenario. A govemment official is in charge of allocating social programs…
Q: (c) Suppose the manager agrees to pay each employee a $50 bonus if they meet a certain goal. On a…
A: Mean = 16.3 Std dev = 4.6 n = 45
Q: Refer to the following scenario. A government official is in charge of allocating social programs…
A: “Since you have posted a question with multiple sub-parts, we will solve first three sub parts for…
Q: A researcher studying public opinion of proposed Social Security changes obtains a simple random…
A: Sample size =30 Americans We have to find how many more adult Americans does the researcher need to…
Q: (a) 15% of all adult Americans support the changes (b) 20% of all adult Americans support the…
A: Concept: According to the central limit theorem, the sampling distribution of the sample proportion…
Q: A researcher studying public opinion of proposed Social Security changes obtains a simple random…
A: The following solution is provided below
Q: Question. 18
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Q: 2. An experiment consists of flipping a fair coin four times. Determine the frequency (mass)…
A: The PMF of a random variable i.e, discrete in nature. It gives the likelihood that the variable…
Q: The Humane Society of California reported in one of its most recent magazines that 11.6% of American…
A: Consider that p is the true population proportion of American adults, who have both a cat and a dog…
Q: You are a researcher who studies children’s behavior in schools – your goal is to decrease problem…
A: Enter the data in SPSS as Where 1 denotes Teacher's aide and 2 denotes No teacher's aide.
Q: A sociologist hypothesizes that the expected proportion of the number of children in certain family…
A: Null Hypothesis: H0: All expected proportion of the number of children in certain family units…
Q: Consider an experiment with sample space S = {A,B,C}. If P(A)=0.3, P(B)=0.5, and P(C)=0.2, then (a)…
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Q: Consider an experiment with sample space S = {A,B,C}. If P(A)=0.6, P(B)=0.2, and P(C)=0.2, then (a)…
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Q: A researcher studying public opinion of proposed Social Security changes obtains a simple random…
A: Given, Sample size n = 50 A) proportion of adult support changes p = 0.20 To find n condition is…
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- A researcher studying public opinion of proposed Social Security changes obtains a simple random sample of 35 adult Americans and asks them whether or not they support the proposed changes. To say that the distribution of the sample proportion of adults who respond yes, is approximately normal, how many more adult Americans does the researcher need to sample in the following cases? (a) 15% of all adult Americans support the changes (b) 20% of all adult Americans support the changes (a) The researcher must ask more American adults. (Round up to the nearest integer.)A researcher studying public opinion of proposed Social Security changes obtains a simple random sample of 30 adult Americans and asks them whether or not they support the proposed changes. To say that the distribution of the sample proportion of adults who respond yes, is approximately normal, how many more adult Americans does the researcher need to sample in the following cases? (a) 15% of all adult Americans support the changes (b) 20% of all adult Americans support the changes ..... (a) The researcher must ask more American adults. (Round up to the nearest integer.) (b) The researcher must ask more American adults. (Round up to the nearest integer.)Fishing: Northern Pike Athabasca Fishing Lodge is located on Lake Athabasca in northern Canada. In one of its recent brochures, the lodge advertises that 75% of its guests catch northern pike over 20 pounds. Suppose that last summer 64 out of a random sample of 83 guests did, in fact, catch northern pike weighing over 20 pounds. Does this indicate that the population proportion of guests who catch pike over 20 pounds is different from 75% (either higher or lower)? Use a = 0.05. (c) Find the P-value of the test statistic. Sketch the sampling distribution and show the area corresponding to the P-value.
- Matrimony Monthly is a top-selling magazine that provides information for couples thinking about marriage. Over the years, writers for the magazine have researched just about everything there is to research about weddings. The popular conception at the magazine has been that roughly 50% of first weddings take place indoors in a church, 30% take place indoors in a building other than a church, and 20% take place outdoors. This past week, the magazine examined a random sample of 280 first weddings and found the distribution given by the first row of numbers in the table below. (This row contains the frequencies observed in their sample of 280.) The second row of numbers gives the frequencies expected under the hypothesis that the popular conception at the magazine is correct. The bottom row of numbers contains the following value for each of the wedding location categories. −fOfE2 fE = −Observed frequencyExpected frequency2 Expected…You have been assigned to test the hypothesis that the average number of cars waiting in line for the drive-thru window during lunch hour differs between Chick-fil-A, Wendy's, and McDonald's. The following data show the number of cars in line during randomly selected times during the lunch hour at all three chains. Chick-fil-A(1) Wendy's(2) McDonald's(3) 7 7 6 10 8 7 11 5 6 8 3 7 9 2 9 Perform a one-way ANOVA using α = 0.05 to determine if a difference exists in the average number of cars waiting in line at the drive-thru during the lunch hour between these chains.A study is conducted in a large high school to determine if the proportion of students who plan to come to the upcoming football game differs across the grades. A random sample of 50 ninth graders, 50 tenth graders, 50 eleventh graders, and 50 twelfth graders was selected. The responses are displayed in the table. The principal would like to know if these data provide convincing evidence that the distribution of responses differs across the grades in the population of all students in her school. The random and 10% conditions are met, and this table of expected counts shows that all expected counts are at least 5. What is the value of the chi-square test statistic for this test? χ‑2 = 0.49 χ‑2 = 0.70 χ‑2 = 0.84 χ‑2 = 200
- Are birthdays "evenly distributed" throughout the year, or are they more common during some parts of the year than others? Owners of a children's toy store chain in the Northwest asked just this question. Some data collected by the chain are summarized in the table below. The data were obtained from a random sample of 190 people. The birthdate of each person was recorded, and each of these dates was placed into one of four categories: winter (December 21-March 20), spring (March 21-June 20), summer (June 21-September 20), and fall (September 21-December 20). The numbers in the first row of the table are the frequencies observed in the sample for these season categories. The numbers in the second row are the expected frequencies under the assumption that birthdays are equally likely during each season of the year. The bottom row of numbers gives the following value for each of the season categories. Answer the following to summarize the test of the hypothesis that birthdays are equally…A student organization is trying to decide whether or not to offer more movies on campus. They want to determine whether this idea will appeal to members of both genders. A random sample of 1000 students was asked if they were in favor of more movies on campus. The results by gender are shown in the table below in Figure 2.Fig. 2: Summary(a) What proportion of the sampled students is in favor of more movies on campus? (b) What proportion of the sampled females is in favor of more movies on campus? (c) What proportion of the sampled males is in favor of more movies on campus? (d) To answer the original question regarding whether or not to offer more movies on campus, which distribution should the student organization study? i. The joint distribution of gender and opinion.ii. The marginal distribution of gender. iii. The conditional distribution of gender given opinion. iv. The conditional distribution of opinion given gender.A researcher studying public opinion of proposed Social Security changes obtains a simple random sample of 25 adult Americans and asks them whether or not support the proposed changes . To say that the distribution of the sample proportion of adults who respond yes, is approximately normal , how many more adult Americans does the researcher need to sample in the following cases? (a) 15% of all adult Americans support the changes (b) 20% of all adult Americans support the changes
- A researcher studying public opinion of proposed Social Security changes obtains a simple random sample of 25 adult Americans and asks them whether or not they support the proposed changes. To say that the distribution of the sample proportion of adults who respond yes, is approximately normal, how many more adult Americans does the researcher need to sample in the following cases? (a) 20% of all adult Americans support the changes(b) 25% of all adult Americans support the changes(a) The researcher must ask _____more American adults. (Round up to the nearest integer.)A researcher studying public opinion of proposed Social Security changes obtains a simple random sample of 50 adult Americans and asks them whether or not they support the proposed changes. To say that the distribution of the sample proportion of adults who respond yes, is approximately normal, how many more adult Americans does the researcher need to sample in the following cases? (a) 15% of all adult Americans support the changes (b) 20% of all adult Americans support the changes (a) The researcher must ask more American adults. (Round up to the nearest integer.) (b) The researcher must ask more American adults. (Round up to the nearest integer.)Refer to the following scenario. A government official is in charge of allocating social programs throughout the city of Vancouver. He will decide where these social outreach programs should be located based on the percentage of residents living below the poverty line in each region of the city. He takes a simple random sample of 120 people living in Gastown and finds that 21 have an annual income that is below the poverty line. For each of the following statements, specify whether the statement is a correct interpretation of the 95% confidence interval for the true proportion of Gastown residents living below the poverty line. A. 17.50% (21/120) of Gastown residents are living below the poverty line. ? B. There is a 95% probability that the true proportion of Gastown residents who are living below the poverty line equals 21/120. C. If another random sample of 120 Gastown residents is drawn, there is a 95% probability that the sample proportion of Gastown residents who are living below…
