test statistic x2 & pvalue
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Q: test statistic and p value are incorrect. please provide correct solutions!!
A: s1=170.97 s2=118.25
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- I AM RESUBMITTING THIS QUESTION FOR DIFFERENT PARTS. I AM AT THE SECOND NUMBER 2 QUESTION "P-VALUE =". Before the furniture store began its ad campaign, it averaged 160 customers per day. The manager is investigating if the average has changed since the ad came out. The data for the 16 randomly selected days since the ad campaign began is shown below: 131, 127, 148, 143, 141, 153, 158, 145, 138, 163, 164, 148, 166, 154, 170, 133 Assuming that the distribution is normal, what can be concluded at the αα = 0.05 level of significance? For this study, we should use Select an answer t-test for a population mean z-test for a population proportion The null and alternative hypotheses would be: H0:H0: ? μ p Select an answer < = ≠ > H1:H1: ? p μ Select an answer = > ≠ < The test statistic ? t z = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) The p-value is ? ≤ > αα Based on this, we…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…Is it possible for a statistic to be unbiased yet very imprecise? How about being very accurate but biased?
- 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 optionsIn 1995, the proportion of all mutual funds that beat their benchmark indices was .42. In 2002, a random sample of 200 mutual fund, it was found that 74 beat their benchmark indices. a) At the 1% level of significance, test to see if the proportion of funds beating their benchmark indices has decreased since 1995 b) What is the p-value? Write down all formulas and hypothesis
- High IQ Exercise 26 proposes modeling IQ scores withN(100, 16). What IQ would you consider to be unusuallyhigh? Explain.b) 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_pregnancyDo wearable devices that monitor diet and physical activity help people lose weight? Researchers had 237 subjects, already involved in a program of diet and exercise, use wearable technology for 24 months. They measured their weight (in kilograms) before using the technology and 24 months after using the technology. (a) Explain why the proper procedure to compare the mean weight before using the wearable technology and 24 months after using the wearable technology is a matched pairs t test. Choose the correct explanation. A person's weight before and after wearing the device would not be independent; thus, the data from this before and after study should be analyzed using a matched pairs t test. O A person's weight before and after wearing the device would be independent; thus, the data from this before and after study should be analyzed using a matched pairs t test. O A person's weight before and after wearing the device would be independent; thus, the data from this before and after…
- Data from the Motor Vehicle Department indicate that 80% of all licensed drivers are older than age 25. Information on the age of n = 50 people who recently received speeding tickets was sourced by researchers who are interested in whether the age distribution for the sample of drivers who recently received speeding tickets is different from the age distribution for the population of licensed drivers. 17 people are 25 or younger, 33 people are older than 25. 1) Test assumptions and make a decision (please provide written evidence to support your decision): 2) Inferential statistic(s) and p-value(s): 3) Decision:Find the missing values ‘*’, ‘**’, ‘***’, Showing necessary workingWhat test should you use to analyze these results, and why? Will you use a one-tailed or a two-tailed test? Also, what is the result of your analysis?
