a. Find the degree of association between reading comprehension and the GWA of the 30 selected students. b. Correlate mathematical ability and GWA c. Correlate reading comprehension and intelligence.
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- A Psychology student wanted to study whether there is a difference in stress levels between gender. She devised a survey to measure stress. There were 20 questions with a total score of 100. She randomly selected 30 male and 30 female students to complete the survey. The stress scores of these 60 students can be found below. Male Female 67 70 68 76 67 69 69 75 70 73 68 88 69 68 70 69 70 75 70 79 71 71 71 68 70 71 71 68 72 78 70 76 69 75 69 69 71 69 69 71 70 68 70 76 70 74 72 71 71 69 70 70 71 74 69 80 72 69 71 79 (i) Describe the 90% confidence intervals for the mean stress score of each gender. Based on the confidence intervals, discuss whether we can conclude that the stress level of both genders are similar. You are required to present the relevant Excel reports. (ii) Apply an appropriate hypothesis test at the 10% significant level to determine whether the stress levels of both genders are similar. You are required…Many people now turn to the internet to get information on health-related topics. A research article used Flesch reading ease scores (a measure of reading difficulty based on factors such as sentence length and number of syllables in the words used) to score pages on Wikipedia and on WebMD. Higher Flesch scores correspond to more difficult reading levels. The paper reported that for a representative sample of health-related pages on Wikipedia, the mean Flesch score was 26.3 and the standard deviation of the Flesch scores was 14.3. For a representative sample of pages from WebMD, the mean score was 43.3 and the standard deviation was 19.6. Suppose that these means and standard deviations were based on samples of 40 pages from each site. Is there convincing evidence that the mean reading level for health-related pages differs for Wikipedia and WebMD? Test the relevant hypotheses using a significance level of 0.05. (Use ₁ for Wikipedia and #₂ for WebMD.) State the appropriate null and…A psychologist is examining the influence of an older sibling in the development of social skills. A sample of three-year old children is obtained. Half the children had no siblings and the others had at least 1 older sibling who is within 5 years of the child's age. The psychologist records a social skills score for each child and obtains the following data. No sibling Older sibling n= 10 n= 17 M= 17 M= 23 2- 50.741 = 48.578 a. Do these data indicate that having an older sibling has a significant effect on the development of social skills? Test at the ,05 level. b. Compute d c. Give an APA formatted summary of your findings.
- What is the first Quartile of the data below: 3 5 3 9 2 9 10Use the following information to answer the next six exercises. Sixty-five randomly selected car salespersons were asked the number of cars they generally sell in one week. 14 people answered that they generally sell three cars; 19 generally sell four cars; 12 generally sell five cars; 9 generally sell six cars; 11 generally sell seven cars. First quartile = Second quartile = median = 50th percentile Third quartile = Interquartile range (IQR) = 10th percentile = 70th percentile =Are very young infants more likely to imitate actions that are modeled by a person or simulated by an object? This question was the basis of a research study. One action examined was mouth opening. This action was modeled repeatedly by either a person or a doll, and the number of times that the infant imitated the behavior was recorded. Twenty-seven infants participated, with 12 exposed to a human model and 15 exposed to the doll. Summary values are shown below. Person Model Doll Model x 5.11 3.47 s 1.60 1.30 Is there sufficient evidence to conclude that the mean number of imitations is higher for infants who watch a human model than for infants who watch a doll? Test the relevant hypotheses using a 0.01 significance level. (Use ?Person − ?Doll.) Find the test statistic. (Round your answer to two decimal places.) t = Find the df. (Round your answer down to the nearest whole number.) df = Use technology to find the P-value. (Round your answer to four decimal places.)…
- Does it take more time for seeds to germinate if they are near rock music that is continuously playing compared to being near classical music? The 55 seeds that were exposed to rock music took an average of 29 days to germinate. The standard deviation was 5 days. The 59 seeds that were exposed to classical music took an average of 25 days to germinate. The standard deviation for these seeds was 10 days. What can be concluded at the a = 0.01 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: H₁: Select an answer ✓ Select an answer ✓ Select an answer ✓ = Select an answer ✓ Select an answer ✓ (please enter a decimal) Select an answer (Please enter a decimal) c. The test statistic ? | = d. The p-value: e. The p-value is ? ✓ a f. Based on this, we should [Select an answer the null hypothesis. g. Thus, the final conclusion is that ... (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal…A. Determine the test statistic B. Find the p-valuePlease answer (b) and (d)
- An educational psychologist is comparing two instructional approaches. She teaches people using visual aids for Approach A, and uses verbal materials for Approach B, and then gives a test after using each approach. The same individuals were used as students of both instructional approaches. She thinks people learn differently when they have visual aids than verbal materials. Approach A:Mean: 26.0 Std. Dev: 8.5 N: 16 Approach B:Mean: 27.0 std. dev: 10.0 N = 16 Difference A-B:mean : -1.0 Std. Dev: 14.0 N = 16 A). Complete test statistic and critical values, which tails B). ConclusionYou are testing the daim that the proportion of men who own cats is larger than the proportion of women who own cats. You sample 70 men, and 20% own cats. You sample 50 women, and 60% own cats. test statistic = [three decimal accuracy]Using the computer output, what is the predicted foot length for a student with an arm span of 160 cm? The arm span and foot length were measured (in centimeters) for each of the 19 students in a statistics class and displayed in the scatterplot. An analysis was completed and the computer output is shown. 5.79 cm 22.15 cm O29.76 cm Arm Span vs. Foot Length O29.80 cm 29 27 25 23 21 19 155 160 165 170 175 180 185 190 195 Foot Length (cm)