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- The contingency table shows the result of a random sample of students by Lika Salmanyan at PCC and the number of hours they spend investing on Robinhood and Acorns by age and gender. At alpha =0.05, can you conclude that age is related to gender when it comes to time spent investing on Robinhood and Acorns. Gender 16-20yrs 21-30yrs 31-40yrs 41-50yrs 51-60yrs 61yrs or older Male 45 170 90 72 45 26 Female 9 30 21 17 10 5 What are the degrees of freedom? What is the critical value? Leave your answers in 3 decimal places The degrees of freedom is and the P- value is .A private lake sells boating memberships and currently has 600 members. During the application process the potential members are asked which recreational activity they do the most. Their choices are fishing, skiing, boarding, swimming, or tubing. The lake manager chooses clients according to their interests to maximize the use of all areas of the lake. Every month, the lake rangers randomly sample the boats on the lake and categorize them according to the activity they are doing. The lake manager performs a chi-square goodness-of-fit test using the following null hypothesis to see whether their samples differ significantly from what the original applications claim. H0:pfish=0.26,pski=0.21,pboard=0.30,pswim=0.12,ptube=0.11 In order to meet the conditions for independence and large counts for a chi-square goodness-of-fit test, which of the following represents all possible sizes of the monthly samples? n≥30 lowercase n is greater than or equal to 30 A 30≤n≤50 30 is less than…Recent surveys of college students suggest that 40% are liberal, 40% are middle-of-the-road (MOTR), and 20% are conservative. How would you assign digits for a simulation to determine the political affiliation (liberal, middle-of-the-road, or conservative) of a college student chosen at random from the population of all college students? Select the correct assignments. Assign 1, 2 to liberal, 3, 4 to MOTR, and 5 to conservative. Assign 1, 2, 3, 4 to liberal, 5, 6, 7, 8 to MOTR, and 9, 0 to conservative. Assign 1, 2, 3, 4 to liberal, 1, 2, 3, 4 to MOTP, and 1, 2 to conservative. Assign I to liberal, 2 to MOTR, and 3 to conservative. Assign 0, 3, 5, 7 to liberal, 1, 4, 8, 9 to MOTR. and 2, 6 to conservative.
- Groups: 1 = 5-25 years, 2 = 26-59 years, 3 = 60-92 years What does LSD testing reveal about Group 2? Group of answer choices: 1. Group 2 has significantly lower FIQ than Group 1 2. Group 2 has significantly lower FIQ than Groups 1 or 3 3. Group 2 has significantly lower FIQ than Group 3 4. Group 2 does not differ in FIQ from Groups 1 or 3 5. Group 2 does not differ in FIQ from Group 1 6. a and c 7. b and d 8. c and eData from a study of two air lines fly to Small Town Flights on Time Flights Late Podunk Airlines 35 12 Upstate Airlines 44 8 if one flight is selected find P(Flights on Time or Podunk Airlines)A Gallup Poll in June 2019 asked 1015 randomly sampled adults living in the United States about their beliefs on how humans originated. Here is a table of their responses: Response Count (1) Humans evolved with God guiding 335 (2) Humans evolved but God had no part in the 223 process (3) God created humans in their present form 406 (4) Other/No opinion 51 Ten years prior, 32% of U.S. adults believed that humans evolved with God guiding, 15% believed that humans evolved but God had no part in the process, 46% believed that God created humans in their present form, and 7% believed something else or had no opinion. Has the distribution of beliefs changed since 2009?
- Plant X manufactures 70 percent of a certain company's bicycles, and Plant Y manufactures 30 percent. It has been found that 4 percent of the bicycles manufactured at Plant X and 5 percent of the bicycles manufactured at Plant Y are defective. What percent of the bicycles manufactured by the company are not defective? O 87.2% O 91.3% O 95.5% O 95.7%[Section 14.2]A group of students is deciding on which month to go to the beach: July(J), August (A), or September (S). Suppose the Borda count method is used to determine a winning month. Is the head-to-head criterion satisfied? Explain.(Devore: Section 3.2 #15) Many manufacturers have quality control programs that include inspec- tion of incoming materials for defects. Suppose a computer manufacturer receives circuit boards in batches of five. Two boards are selected from each batch of inspection. We can represent possible outcomes of the selection process by pairs. For example, the pair (1,2) represents the selection of boards 1 and 2 for inspection. (a) List the ten different possible outcomes. (b) Suppose that boards 1 and 2 are the only defective boards in a batch. Two boards are to be chosen at random. Define X to be the number of defective boards observed among those inspected. Find the probability distribution (pmf) of X. (c) Let F denote the cdf of X. Determine F(0), F(1) and F(2); then obtain F(x) for all other x.
- the comic book store owner is curious in how well radio and newspaper advertisements work. A sample of 22 counties with almost equal populations was gathered during the month. For each of the counties, the owner has set aside a particular sum for radio and newspaper advertising. Additionally, the owner was able to access comic book sales information for the stores he controlled in each county and classified it as Low or High. COUNTY (X1) Comic book Sales (X2) (0 = Low, 1 = High) Radio Ads (X3) (in thousands) Newspaper Ads (X4) (in thousands) 1 1 0 40 2 0 0 40 3 0 25 25 4 0 25 25 5 0 30 30 6 0 30 30 7 0 35 35 8 0 35 35 9 0 40 25 10 0 40 25 11 1 45 45 12 1 45 45 13 1 50 0 14 1 50 0 15 1 55 25 16 1 55 25 17 1 60 30 18 1 60 30 19 1 65 35 20 1 65 35 21 1 70 40 22 1…A private lake sells boating memberships and currently has 600 members. During the application process the potential members are asked which recreational activity they do the most. Their choices are fishing, skiing, boarding, swimming, or tubing. The lake manager chooses clients according to their interests to maximize the use of all areas of the lake. Every month, the lake rangers randomly sample the boats on the lake and categorize them according to the activity they are doing. The lake manager performs a chi-square goodness-of-fit test using the following null hypothesis to see whether their samples differ significantly from what the original applications claim. Ho Pfish =0.26, p,ki = 0.21, proard 0.21, Phoard 0.30, Psuim 0.12, Prube 0.11 In order to meet the conditions for independence and large counts for a chi-square goodness-of-fit test, which of the following represents all possible sizes of the monthly samples? A n> 30 B. 30 n< 50 46A researcher wishes to try three different techniques to lower the blood pressure of students diagnosed with high blood pressure in the school sickbay. The subjects are randomly assigned to three groups; the first group takes medication from the school nurse, the second group takes exercises led by the school sports master, and the third group follows a special diet from the school pantry. After four weeks, the reduction in each person’s blood pressure is recorded in the table below. TECHNIQUES Medication Exercise Diet 10 6 7 12 8 9 9 3 12 15 10 8 14 2. 5TOTAL 60 29. 41At α = 0.05, analyse this case study in a one way ANOVA