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- A researcher predicts that scores in treatment A will be higher than scores in treatment B. If the mean for the 10 participants in treatment A is 4 points higher than the mean for the 10 participants in treatment B and the data produced t = 2.095 What decision should be made? Choose one a. With an alpha = .05 reject the null for either a one tail or two tails b. With an alpha = .05 fail to reject the null for either a one tail or two tails c. With an alpha = .05 reject the null for one tail but fail to reject with two tails d. With an alpha = .05 reject the null for two tails but fail to reject for a one tailUsing the information provided in the SPSS output. You are asked to make a decision about whether to reject the null hypothesis that the population value of gamma equals 0 (i.e., that there is no ordinary association in the population between frequency of prayer and health). If alpha = 0.05 and you use a non-directional alternative hypothesis, which of the following is true?) A. Since the p-value is larger than alpha, you do not reject the null hypothesis B. Since the p-value is less than alpha, you do not reject the null hypothesis C. Since the p-value is larger than alpha, you reject the null hypothesis. D. Since the p-value is less than alpha, you reject the null hypothesisA researcher who wants to know whether the proportion of male births in a hospital is different from the established baseline of 51.07%, would like to test the following hypotheses: Ho:P = 0.51 vs. Ha :P = does not equal 0.51 a) Is the alternative hypothesis upper tail, lower tail, or two tailed? b) What do you conclude if the test results p-value of 0.03 at alpha value = 5% c) What do you conclude if the test results p-value of 0.08 at alpha value = 10%
- Assume we wanted to show that the true proportion of virginica iris seeds that fail to germinate is less than 20%. Let's say we tested at an alpha of 0.05, and found a p-vale of 0.082. Which of the following would be an appropriate conclusion and interpretation? A) With an alpha of 0.05, and a p-value of 0.082, we fail to reject the null and state we have insufficient evidence to support that the true proportion of virginica iris seeds that fail to germinate is less than 20%. B) With an alpha of 0.05, and a p-value of 0.0082, we reject the null and state we have sufficient evidence to support that the true proportion of virginica iris seeds that fail to germinate is less than 20%. C) With an alpha of 0.05, and a p-value of 0.082, we reject the null and state we have sufficient evidence to support that the true proportion of virginica iris seeds that fail to germinate is less than 20%. D) With an alpha of 0.05, and a p-value of 0.082, we fail to reject the null and state…andres asked if there is a relationship between the quality of sneakers worn by a sample of 20 volleyball players and their average number of point scored per game. he computed r= +.21 and immediately claimed he had evidence that better-quality sneakers are related to better performance (a) is his claim correct? why? (b) what are Ho and Ha? (c) with alpha=.05, what is rcrit ?Assume that on average undergraduate students drink 7.5 cups of coffee per week (with a population standard deviation of 4.7). A class of 19 psychology students drinks 5 cups on average per week. Which of the following statistical tests should you run given this information? a. One sample z-test b. One sample t-test c. One sample p-test d. None of the above Given the statistical test you are running for this example, what are the (two-tailed) critical values (alpha = .05)? a. -2.09 & 2.09 b. -1.96 & 1.96 c. Can't calculate from the information provided d. None of the above
- In a local community past data shows that 17% of the residents own a skateboard, and the city is considering building more green lanes to accommodate these skate boarders as a recent survey showed that 63 out of 270 people supported the concept of more green lanes on the city's streets. a) State the null and alternative hypothesis. b) Find a Z and P-value, and state your conclusion using alpha = 5% c) Re-do part (b) using the Chi-square test, also stating your conclusion using alpha = 5%Assume we wanted to show that the true average pulse rate of hamsters is greater than 55 beats per minute. Let's say we tested at an alpha of 0.07, and found a p-value of 0.864. Which of the following would be an appropriate conclusion and interpretation? A) With an alpha of 0.07, and a p-value of 0.864, we fail to reject the null and state we have insufficient evidence to support that the true average pulse rate of hamsters is greater than 55 beats per minute. B) With an alpha of 0.07, and a p-value of 0.864, we reject the null and state we have insufficient evidence to support that the true average pulse rate of hamsters is greater than 55 beats per minute. C) With an alpha of 0.07, and a p-value of 0.864, we reject the null and state we have sufficient evidence to support that the true average pulse rate of hamsters is greater than 55 beats per minute. D) With an alpha of 0.07, and a p-value of 0.864, we fail to reject the null and state we have sufficient evidence to…For each of the following situations, identify whether the appropriate test is a paired t-test (for parameter µd) or a two-sample t-test (for parameter µ1 - µ2). Briefly explain your answer. Sixty students were matched by initial pulse rate, with the two with the highest pulse forming a pair, and so on. Within each pair, one student was randomly chosen to drink a caffeinated beverage, while the other one drank an equivalent amount of water. Their pulse rates were measured 10 minutes later, to test whether caffeine consumption elevates pulse rates. To determine whether lack of sleep increases appetite, researchers recruited 50 volunteers and randomly assigned 25 of them to sleep at least 8 hours a night and the other 25 to sleep at most 5 hours a night, for 3 days. Calorie intake was recorded for all 50 volunteers for the 3-day period.
- Data from the 2014 General Social Survey (GSS) show that out of n=1,606 adult respondents, the proportion who reported having voted for Barack Obama in the 2008 presidential election was 0.61 Q: If I calculate a z test static of 4.84, and my alpha = 0.05, what decision should I make about the hypothesis? (Calculate the p-value for a 2-sided test to make your decision.) Options: A: fail to reject the null hypothesis that the proportion of American adults who voted for Obama in 2008 was 0.55 B: reject the null hypothesis that the proportion of American adults who voted for Obama in 2008 was 0.55 C: Reject the alternative hypothesis that the proportion of American Adults who voted for Obama in 2008 was not equal to 0.55 D: Fail to reject the alternative hypothesis that the proportion of American adults who voted for Obama in 2008 was not equal to 0.55There is a marketing researcher who wants to test the effectiveness of a new commercial by giving participants a survey asking their likelihood of buying a certain cleaning product where 1= not at all likely and 5= extremely likely. The participants will be given the questionnaire before and after watching a show that advertised the cleaning product during commercial breaks. We must Test the hypothesis that the commercial produced an effect on these scores using alpha = .05. list conclusions using variable names and calculate Cohen’s d, if applicable. Step 1: Ho: H1: Step 2: Critical region: Step 3: tobt = Step 4: Which one: fail to reject H0/reject H0 Did the commercial have a statistically significant effect? YES/NO What is the research design used? What is the appropriate statistical analysis?1.Distinguish p-value from alpha. 2. Which of the following alpha values provides the strongest evidence the reject the null hypothesis? a. 5%b. 1%c. 0.01% 3. Which approach measures the strength of the evidence against the null hypothesis, the p-value approach or the critical value approach?