test statistic x2 & pvalue
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- 21WB_MATH_1016_WBON Ashley Ramos & Homework: Unit 7 Homework Save Score: 0.83 of 5 pts 6 of 14 (11 complete) HW Score: 49.17%, 24.58 of 50 pts 7.2.31-T Question Help A random sample of 75 eighth grade students' scores on a national mathematics assessment test has a mean score of 293. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 285. Assume that the population standard deviation is 32. At a = 0.14, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify Ho and Ha. Choose the correct answer below. O A. Ho: H2285 (claim) O B. Ho: H= 285 (claim) Ha:H> 285 Ψc. H : μ# 285 Ha:H 285 (claim) OD. Ho:H= 285 Ο Ε. H : μ 285 Hai H> 285 (claim) (b) Find the standardized test statistic z, and its corresponding area. z = 2.17 (Round to two decimal places as needed.) (c) Find the P-value. P-value = (Round to three decimal…Among a random sample of 2739 female atom bomb survivors, 1397 developedthyroid diseases. Among 1352 male atom bomb survivors, 436 developed thyroid diseases. Use a 0.01 significance level to test the claim that female survivors and male survivors have different rates of thyroid diseases. Use the p-value method. include a diagram of the distribution indicating important components of the question.A researcher conducted a one-way ANOVA comparing the means of four groups with each group consisting of 5 individual scores. What are the degrees freedom within and between? Edit View Insert Format Tools Table
- Are freshmen psychology majors less likely to change their major before they graduate compared to freshmen business majors? 454 of the 687 freshmen psychology majors from a recent study changed their major before they graduated and 439 of the 619 freshmen business majors changed their major before they graduated. What can be concluded at the = 0.05 level of significance? The test statistic z = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.)Prof. X has been monitoring all stats students' anxiety levels by covertly measuring micro-expressions with in-class video surveillance during each exam (including this one!). Prof. X wants to determine if anxiety levels differed across the three exams. Which statistical test should be used? Select one: a. One-way between subjects ANOVA Incorrect b. One-way repeated measures ANOVA c. Two-way between subjects ANOVA d. None of these optionsb) what is the correcr DF? option: 979, 973, 940, 934 c) which predictor is the most significan variable? option: smoke, height, age, gestation, weight, first_pregnancy d) which predictor is the least significan variable? option: smoke, height, age, gestation, weight, first_pregnancy
- Compute 70th percentile and compute the interquartile range 50,47,58,53,66,81,73,65,51,71,58Find the missing values ‘*’, ‘**’, ‘***’, Showing necessary working"STA3000Y - Advanced Theory of Statistics" is a graduate course taught at UTSG, which can only be taken by PhD students in the Department of Statistical Sciences. Assume the class consists of N = 8 students. The final marks in the course are: 95, 66, 71, 93, 75, 88, 68, 100 Find o?, the population variance. Show all the steps. Do not use any statistical package/excel here. For example, do not copy the final answer from R or from excel. Circle the final answer. Based on a simple random sample (without replacement) of size 4 selected from this class, find the exact variance of the sample total. Show all the steps. Circle the final answer. Based on a simple random sample (with replacement) of size 4 selected from this class, find the exact variance of the sample total. Show all the steps. Circle the final answer. According to the graduate school, a student fails a course if a student scores less than 72. Based on a simple random sample (without replacement) of size 4 selected from this…
- The Comprehensive Assessment of Outcomes in Statistics (CAOS) exam is an online multiple-choice teston concepts covered in a typical introductory statistics course. Students can take a pretest version beforeinstruction and then a posttest version after instruction. Fter taking the class, the pretest and posttest scoresare compared to assess student learning in the course.For a random sample of 10 students who took the class from Professor X, the posttest scores increased overthe pretest score by an average of 14 percentage points, with a standard deviation of 6.4 points. a) What additional information (if any!) do we need to know in order to use t-based methods from thisdata set? b) Compute a 95% confidence interval for the mean improvement in CAOS scores for students who tookthe class from Profesor X. c) The developers of the CAOS exam report that, for all students who have taken the CAOS exam (andnot just Professor X’s students), the mean improvment is 10.1. Do we have evidence to…A survey question asked whether you were looking forward to the time of self-driving, (autonomous) cars, and the choice of answers was yes or no. 1). Is it the appropriate statisticv ^p or x?Employees of a state university system can choose from among four different health plans. Each plan differs somewhat from the others in terms of hospitalization coverage. Four random samples of recently hospitalized individuals were selected, each sample consisting of people covered by a different health plan. The length of the hospital stay (number of days) was determined for each individual selected. USE SALT (a) What hypotheses would you test to decide whether the mean lengths of stay are not the same for all four health plans? (Let μ₁, M₂, M3, and 4 be the true mean length of hospital stay for the four different health plans.) OH₁ H₁ = ₂ = μ3 = μ4 H₂: all four of the u.'s are different O Ho: M₁ M₂ # μ3 = μ4 H₂ : at least one pair of the four μ's are the same O Ho: M₁ = ₂ = μ3 = μ4 H₂: at least one pair of the four u.'s are different O Ho: all four of the μ's are different H₂ M₁ = M₂ = H3 = μ²4 O Ho: at least one pair of the four μ's are different H₂ : M₁ = M₂ = μ3 = μ4 (b) If each…