Test statistic = ? c. P-value = ? d. Reject/Accept null hypothesis ?
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14.
b. Test statistic = ?
c. P-value = ?
d. Reject/Accept null hypothesis ?
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- 13. The sign of the alternative hypothesis in a two-tailed test is always A. C. greater than D. less than equal B. not equal 14. This hypothesis states that there is no difference between population parameters and the hypothesized value. A. hypothesis B. alternative hypothesis C. null hypothesis D. two-tailed hypothesis 15. "The ratings given by male and female students with regard to the online teaching skills of their teachers is the same." This statemen example what kind of hypothesis? A. one-tailed hypothesis B. alternative hypothesis C. null hypothesis D. two-tailed hypothesis 16. "The use of social media as modern approach of advertising will increase the demand for a new product." This is an exam __hypothesis. A. Mean B. null C. alternative D. two-tailed 17. Which is the correct alternative hypothesis for one-tailed test? A. µ = 25 B. µ # 25 C.µ ≥ 25 D. p < 25 18. Mrs. Nazareth conducted a research on the preference of residents of Mayapa in choosing their venue for occasions.…10. Use the given confidence interval to find the margin of error and the sample mean. (15.0,22.4) The sample mean is The margin of error is (Type an integer or a decimal.) . (Type an integer or a decimal.)10) The average height of males in the freshmen class of a certain college has been 68.5 inches. Is there a reason to believe that there has been no change in the average height if a random sample of 50 males in the present freshmen class has an average height of 69.7 inches with a standard deviation of 2.7 inches? Use a 0.01 level of significance. Solution: I. Statement of the Hypothesis: Но H1 II. Statistical Test: III. Level of Significance and Critical Value: IV. Computed value of Z: V. Conclusion:
- Which two quantities are needed to estimate the standard error of the proportion‘s toward the further estimation of confidence interval‘s for proportion’s? A) sample mean and sample standard deviation B) sample proportion in sample size C) population proportion in population size D) population mean and population standard deviation ( don't Hand writing solution)07 A statistics professor wants to determine whether the average grade on Assignment 1 differs significantly from 23 (A average). a) State the null and alternative hypotheses. b) Based on the t-test in the following table 1, make a decision regarding the null hypotheses. c) Explain the results observed in (b). assign1 assign1 t -4.944 N dif 15 14 Mean 21.0333 Std. Deviation 1.54072 Test Value = 23 Mean Sig. (2-tailed) Difference .000 -1.96667 Table 1: T-test Std. Error Mean 39781 95% Confidence Interval of the Difference Lower Upper -2.8199 -1.11344. The amount of juice from a dispenser has a normal distribution with a mean of 240ml. A random sample of 10 glasses of juice dispensed from the machine had a mean of 200ml and a standard deviation of 130 ml. A test was carried out at the 5% level of significance to determine if on average the machine does not dispense 240ml of juice. a) State, in symbols, appropriate null and alternative hypothesis for the test. b) Calculate the critical value for the test. c) Calculate the test statistic. d) State, with reason, your decision and conclusion for this test.
- urgent pleaseSuppose the number of observations in a sample is 30, sample mean is 73 and sample standard deviation is 13. Perform a test of null hypothesis is `population mean is equal to 72` and the alternative hypothesis is `population mean is greater than 72`. (Use 5% significance level) a) 0.42: accept the null b) -0.42: reject the null c) 0.25: accept the null d) -0.25: reject the null5. a). What is a fundamental difference between the t statistic and a z-score in terms of variability? b). What value is estimated with a confidence interval using the t statistic?
- Average heart rate for Americans is 72 beats/minute. A group of 25 individuals participated in an aerobics fitness program to lower their heart rate. After six months the group was evaluated to identify is the program had significantly slowed their heart. The mean heart rate for the group was 69 beats/minute with a standard deviation of 6.5. Was the aerobics program effective in lowering heart rate? a) What would be the null hypothesis and alternative hypothesis in this study? b) What is your tcrit(t critical value) ? c) Is there a significant difference between the two groups? d) Interpret your answer. e) Write out your t-value in APA format. *ANSWER ALL PARTS OF THE QUESTION*WHO (World Health Organization) states that 1500 cals is the average daily calorie intake for the people in Hatay. A group of 100 people are selected from there, and the mean and standard deviation of the daily calorie intake are found to be 1700+HI cals and 900 cals, respectively. Use 5% significance level and; a) Perform a test of hypothesis if the WHO statement about the daily average calorie intake still holds? b) Find the probability of committing a Type II error and calculate the Power of Test when the real average is 1800+HI. H is 3 and I is 217. Confidence interval is for population parameter and prediction interval is for a variable . Select one: True of false