Thinking of the Upper Quartile, which of the following statements is correct?
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Q: not use ai please
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Q: wrong answer for letter c, it was asking the LOWER quartile.
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Q: Test the claim that the proportion of people who own cats is significantly different than 80% at the…
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- How do I solve this? Please show your work so I can understandif a researcher concludes that cereal color has no effect on amount consumed but the researcher was wrong in this conclusion which of the following best represents his decision? correct decision, type 1 error, type 2 error, or type 3 errorDo iPads Help Kindergartners Learn: A Subtest The Auburn, Maine, school district conducted an early literacy experiment in the fall of 2011. In September, half of the kindergarten classes were randomly assigned iPads (the intervention group) while the other half of the classes got them in December (the control group.) Kids were tested in September and December and the study measures the average difference in score gains between the control and intervention group.52 The experimenters tested whether the mean score for the intervention group was higher on the HRSIW subtest (Hearing and Recording Sounds in Words) than the mean score for the control group. a)State the null and alternative hypotheses of the test and define any relevant parameters. b) The p-value for the test is 0.02. State the conclusion of the test in context. Are the results statistically significant at the 5% level? c) The effect size was about two points, which means the mean score for the intervention group was…
- Test the claim that the proportion of men who own cats is significantly different than the proportion of women who own cats at the 0.01 significance level. Based on a sample of 80 men, 25% owned catsBased on a sample of 40 women, 50% owned catsThe test statistic is: (to 2 decimals)The p-value is: (to 2 decimals)Which of the following scenario is an example of a matched-pairs design? Group of answer choices comparison of the aggression scores of boys and girls comparison of third-grade boys to the known population comparison of the aggression scores when are in third grade, then in fifth grade comparison of the aggression scores of third-grade students and fifth-grade students matched on genderplease show working out. Thank you A University has put in place a 4 week course of lunchtime exercise breaks for its staff to see if its employees’ job satisfaction can be improved. To measure the effectiveness of this program, 10 randomly selected staff in the program were surveyed about their feelings at work, once at the start of the program and again after the course. Higher scores indicate higher satisfaction. The job satisfaction index results for this group were: Staff 1 2 3 4 5 6 7 8 9 10 Before 34 28 29 45 26 27 24 15 15 27 After 33 31 36 46 32 34 28 26 19 37 Use a test of significance at 5% level to decide if the program has improved the employee’s job satisfaction on average. Show your graphical evidence, if needed, and clear conclusion. - please sketch the curve as well. thank you
- A survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age 40 or older. Sample data follow. Age Group Hours of Sleep 39 or younger 40 or older Fewer than 6 38 36 6 to 6.9 60 57 7 to 7.9 76 74 8 or more 66 93 (a) Conduct a test of independence to determine whether hours of sleep are independent of age. (b) What is your estimate of the percentages of individuals who sleep fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more per night?The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.A researcher gathered a sample of participants who volunteered for a studying of phobias. She measured anxiety level of participants as they viewed photos of spiders and again when they viewed puppies. Which statistical test is appropriate for this study and why?
- Test the claim that the proportion of people who own cats is larger than 40% at the 0.1 significance level. Based on a sample of 500 people, 46% owned catsThe test statistic is: (to 2 decimals)The p-value is: (to 2 decimals)Using the z-scores you found, who is more likely to score 10 points in a game the Goodyear Silents' or their opponents and why? A. The Goodyear Silents would have a z-score furtherest from the mean so they are most likely B. Their opponents have a z-score furtherest from the mean so they are most likely C. The Goodyear Silents would have a z-score closest to the mean so they are most likely D. Their opponents have a z-score closest to the mean so they are most likelyStandardized test scores For his Statistics class experi-ment, researcher J. Gilbert decided to study how parents’ income affects children’s performance on standardizedtests like the SAT. He proposed to collect informationfrom a random sample of test takers and examine therelationship between parental income and SAT score.a) Is this an experiment? If not, what kind of study is it?b) If there is relationship between parental incomeand SAT score, why can’t we conclude that differencesin score are caused by differences in parentalincome?