QUESTION 28A research wants to determine if pre-natal exposure to the hormones in birth control pills alters the sex makeup ofmidshipman fish populations (which are typically half male and half female).Specifically, the researcher wishes to test the hypothesis that exposure to hormones will increase the number of femalesin the population.The researcher exposes a group of pregnant midshipman fish to birth control hormones and records the sex of the first16 offspring birthed.They then observe that 14 are female.Use a sign test and a alpha of .05 to test the indicated hypothesis.What is the critical value?Click Save and Submit to save and submit. Click Save All Answers to save all answers.20°F Mostly s14f81+f9f10米2$4&*8.RYFH.JK

Answered: Image /qna-images/answer/cdad30ac-9c9d-4514-b170-12e74fcc820e.jpg

Answered: QUESTION 28 A research wants to…

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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. In a study to investigate the effect of regular physical exercise on the reduction of high blood pressure in males aged 60-65, the researchers selected at random a sample of n₁ =12 males suffering from high blood pressure in the given a 12ge group and for a two-year period placed the subjects on a daily physical exercise program. A second sample of n₂ =12 males suffering from high blood pressure in the given age group was selected and again for the two-year period this group of subjects were placed on a physical exercise program for which they were required to perform only once a week. Finally a third sample of n3 =12 males suffering from high blood pressure in the given age group was selected. No exercise program was required for individuals in sample three. At the end of the two-year period the reduction in blood pressure was measured for each of the subjects in the study and is presented in the table on the next page. Table V.1: Reduction in Blood pressure for three groups of…
QUESTION 5 Public relation companies conducted two surveys about deodorants. The first survey asked a random sample of 500 men about their use of a natural deodorant. A second survey asked the same questions to a random sample of 550 women. In these two studies, 68% of men and 44% of women stated they were dissatisfied with the effectiveness of natural deodorants. Use these results to answer the following questions about the proportion of men and women's satisfaction with natural deoderants. (Round to the nearest whole person as needed). What is the difference between the proportion of men and women? (write as a decimal) The standard error for these two samples is (round to the nearest hundredth) Using a 99% confidence level, the lower limit is and the upper limit is QUESTION 6 Save All Answe Click Save and Submit to save and submit. Click Save All Answers to save all answers. ILOIIOOCI V O UDDU Y D IIINO VIIIS UING DIUvUlU DINU W uvup Hotgut auvut youISUII UNu yu @四田07A CC DIC. étv 12…
QUESTION 6 Public relation companies conducted two surveys about deodorants. The first survey asked a random sample of 500 men about their use of a natural deodorant. A second survey asked the same questions to a random sample of 550 women. In these two studies, 68% of men and 44% of women stated they were dissatisfied with the effectiveness of natural deodorants. Use these results to answer the following questions about the proportion of men and women's satisfaction with natural deodorants. (Round to the nearest whole person as needed). Is there a statistically significant difference between men and women's satisfaction with natural deodorants? Yes, the proportion of men that are satisfied with natural deodorants is significantly less than the proportion of women that are satisfied with natural deodorants because both the lower limit and the upper limit of the confidence interval are positive values. Yes, the proportion of men that are satisfied with natural deodorants is…
Question Completion Status: QUESTION 10 TABLE 4-1 Mothers Against Drunk Driving is a very visible group whose main focus is to educate the public about the harm caused by drunk drivers. A study was recently done that emphasized the problem we all face with drinking and driving. Four hundred accidents that occurred on a Saturday night were analyzed. Two items noted were the number of vehicles involved and whether alcohol played a role in the accident. The numbers are shown below: Number of Vehicles Involved 2. 100 135 275 3. Totals Did alcohol play a role? Yes No 50 25 75 20 30 50 170 230 400 Totals Referring to Table 4-1, given that 3 vehicles were involved, what proportion of accidents involved alcohol? O20/50 or 40% 20/170 or 11.77% 20/400 or 5% 20/30 or 66.67%
Question 6 W A random sample of 300 United States cell phone users were asked their age and the question "Do you regularly use your cell phone to text while eating dinner?" The number responding yes was tabulated separately for young adults (aged 18-29), older adults (aged 30-64), and elderly adults (aged 65 or older). The results are summarized in the following table. Uses Cell Phone to Text while Eating Dinner Yes No Total Young adults 127 130 Age Group Older adults 113 29 142 Elderly adults 15 13 28 Total 255 45 300 Which of the following would be the appropriate hypotheses to investigate whether the survey provides convincing statistical evidence that there is an association between a person's age-group and regular use of a cell phone to text while eating dinner? Ho : Among adults in the United States population, there is no difference between age-groups in the proportion of individuals who use their cell phone to text while eating dinner. A H, : Among adults in the United States…
DO QUESTION 7 AND 8 ONLY A new study to determine the effectiveness of winter flu vaccinations measures the benefits of a flu shot for school children. The study comprises two random samples of school children who were vaccinated. One sample is from a primary school and the other from a high school. Question 1 According to previous studies, 50% of vaccinated primary school children contract winter flu. If a study takes a random sample of 18 vaccinated primary school children, the probability that less than 4 children in the sample contract flu is 0.0038 0.0117 0.0154 0.6439 Question 2 For the random sample in Question 1, the probability that at least 4 children but no more than 8 children contract flu is 0.0154 0.2366 0.4035 0.5713 Question 3 The new study claims that the probability of contracting the winter flu among vaccinated high school children is less than 0.5. Assume that p is the population proportion of vaccinated high school children who contract the flu. The…
QUESTION 5 An experiment was conducted to evaluate the effectiveness of a treatment for tapeworm in the stomachs of sheep. A random sample of 60 worm-infected lambs of approximately the same age and health was randomly divided into two groups. Thirty of the lambs were injected with the drug and the remaining thirty were left untreated. After a 6-month period, the lambs were slaughtered and the number of worms in the lamb of the stomach were counted. The drug-treated sheep had a mean of 24.67 worms with a standard deviation of 13.78. The untreated sheep had a mean of 37.82 worms with a standard deviation of 18.21. Assuming the true variances cannot be assumed equivalent, which of the following would be the correct way to calculate a t test for a two-tailed hypothesis test? OA. 24.67-37.82 O B. о с. t ¹0= 13.78 18.21 30 30 24.67-37.82 + (13.78) 2 30 + 24.67-37.82 + (18.21) ² 30 13.78 18.21 60 60 + 24.67-37.82 (13.78) 2 60 (18.21) 2 60
a. A researcher studied the effect of social influence on drinking behaviour. Sixty people were randomly assigned to one of three conditions where they were given a soft drink to consume while waiting for the experiment to supposedly begin. An experimental assistant, posing as another participant, was also given a drink. In one condition, the assistant sipped the drink at a faster rate than the research participant; in another condition, the assistant sipped the drink at the same rate as the participant; and in the last condition, the assistant sipped the drink at a slower rate than the participant. The time it took each participant to consume his or her drink was measured.
QUESTION 6 Suppose there are 115 patients in a clinical trial. Of those, 35 received a real medication and were cured of their illness, 20 received the real drug and were not cured, 28 received a sugar pill (placebo) and were not cured and the remaining received a sugar pill and were cured. When testing (at the 5% level of significance) whether the medication was effective (or thinking about it another way, testing whether getting the medication and being cured is independent or not), what is the critical value (please round your answer to 3 decimal places)
QUESTION 8 A social psychologist gave a questionnaire about concern for farm workers to seven participants before and after they attended a film about union organization of farm workers to determine whether the film affected their level of concern. Which of the following hypothesis tests would be most appropriate given this scenario? O single-sample t-test independent sample t-test O dependent sample t-test Oz-test
Question 10 The national society of acupuncturists asked a random sample of 450 adults their opinion about acupuncture being a reasonable form of medicine or not a reasonable form of medicine. The table below shows the responses, along with the highest level of education achieved for each person selected. High School Graduate or Below Some College Bachelor's Degree or Higher Total Acupuncture is a reasonable form of medicine 100 80 60 240 Acupuncture is not a reasonable form of medicine 60 70 80 210 Total 160 150 140 450 Assuming that all conditions for inference have been met, which of the following represents the correct chi-square test statistic and number of degrees of freedom to test whether there is an association between level of education and opinion about acupuncture? (100–85.33)? (80–80)² (60–74.67) (60–74.67) (70–70)² (80–65.33) x² = A with 2 degrees of freedom 100 80 60 60 70 80 2 x2 (100–85.33)? (80–80)² (60–74.67) (60–74.67)? (70–70)² (80–65.33)? В with 2 degrees of…

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