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A: * SOLUTION :- (4) From the given information the answer is given as follows ,
27) The only difference between a one- and two-sided hypothesis test is:
- A. dependent on the
sample size n. - B. how you interpret the t-statistic.
- C. the sign of the slope coefficient.
- D. the null hypothesis.
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- QUESTION 23 A lab technician realizes the test he had just conducted gave him a false negative result. What is this an example of? Type 1 error Type 2 error Hypothesis error Test errorASSISTANCE REQUIRED FOR PART "e" i- vi ONLY, please. Also can you please show step by step how to get null and alternative in the hypothesis? A car company wants to know the monthly sales made in ($000), based on the brand of vehicle.The data collected was entered on a MINITAB spreadsheet for analysis. Exhibit II below was subsequently generated. Exhibit 2 Model N Mean Median Tri.Mean Std Dev S.E. Mean Hyundai 23 109 135 107.64 * 1.34 Toyota 27 165 124 143.65 9.5 ** a) Determine the values of * and **. b) Give the unbiased point estimate for the average monthly earning from Hyundai Vehicles.c) Give the unbiased point estimate for the variance of monthly earning from Hyundai Vehicles.d) Assuming normality, construct and interpret a 90% confidence interval for the average monthly earning from Toyota Vehicles. e) You are required to test at the 5% level of significance the hypothesis that the average monthly earnings on Hyundai Vehicles is equal to $110,000 versus the…Economic topic. Solve it A radio shop sells, on an average, 200 radios per day with a standard deviation of 50 radios After an extensive advertising campaign, the management will compute the average sales for the next 25 days to see whether an improvement has occurred. Assume that the daily sales of radios is normally distributed: (i) Write down the null and the alternative hypotheses. (ii) Test the hypothesis at 5% level of significance if X = 216. %3D (iii) How large must Xbe in order that the null hypothesis is rejected at 5% level of significance.
- Which of the following is a reason for using independently pooled cross sections? a. To increase the sample size b. To select a sample based on the dependent variable c. To select a sample based on the independent variable d. To obtain data on different cross sectional unitsNext 3 questions are related to the following: A random sample of 1200 vehicles on a freeway are clocked to test the hypothesis that the proportion of vehicles driving above 80 miles per hour is 25%. The number of vehicles in the sample driving above 80 mph is 326. What is the sample proportion? 31 a 0.267 0.272 0.276 d 0.281 32 The test statistic is: a 1.73 1.67 1.60 d 1.54 33 The p-value is, 0.0830 Reject Ho at a = 0.10. 0.0798 Do not reject Ho at a = 0.05. 0.0415 Reject Ho at a = 0.05. 0.0399 Reject Ho at a = 0.05. a b dA shopper wanted to test whether there was a difference in the average waiting times at the check-out counter among 5 different supermarkets. She selected a random sample of 20 shoppers from each of the five supermarkets. i. What is the null hypothesis for this situation? OThe average waiting time to check out is 25 minutes for all five supermarkets OThe average waiting time for each of the 100 shoppers is different. ONone of these OThe average waiting time to check out is the same for all five supermarkets OThe average waiting time to check out is not the same for all five supermarkets. ii. What is the alternative hypothesis for this situation? OThe average waiting time to check out is 25 minutes for all five supermarkets OThe average waiting time to check out is the same for all five supermarkets OThe average waiting time for each of the 100 shoppers is different. ONone of these OThe average waiting time to check out is not the same for all five supermarkets.
- Consider the following hypothesis test. Ho: H = 15 На: и# 15 A sample of 50 provided a sample mean of 14.05. The population standard deviation is 3. (a) Find the value of the test statistic. (Round your answer to two decimal places.) (b) Find the p-value. (Round your answer to four decimal places.) p-value (c) At a = 0.05, state your conclusion. Reject Ho. There is sufficient evidence to conclude that u # 15. Reject Ho. There is insufficient evidence to conclude that u + 15. Do not reject Ho. There is sufficient evidence to conclude that u + 15. Do not reject Ho. There is insufficient evidence to conclude that u + 15. O O O OWhat is the value of the test statistic for a test with a null hypothesis that mu = 250, Xbar = 260 the standard deviation = 5 and n = 100?The score of 8 candidates prior and after training are given below Test the hypothesis whether performance improved after the training at 5% los. Prior 84 48 36 37 54 69 83 96 After 90 58 42 44 62 81 84 86
- A company that has a 15% market share launches a marketing campaign. At the end of the campaign period, the company conducts a survey in order to assess whether its market share has increased. From a survey issued to 500 customers after the campaign, the company found that 90 of them were committed to their products. a. Write the null and alternative hypotheses. b. What is the value of the test statistic? c. What is the associated P-value? d. State your conclusion using α = 0.05.A tea company appoints four salesmen A, B, C and D and observes their sales in three months, April, May and June: Months Salesmen A B C D April 36 36 21 35 May 28 29 31 32 June 26 28 29 29 Prepare a two – way analysis of variance table Name the blocking variable and the treatment in this experiment. Test at the 5% level of significance the null hypothesis that there is significant difference in sales made by the four salesmen Test at the 5% level of significance the null hypothesis that there is significant difference in the sales made during different months.15 To perform a test of hypothesis that the population slope parameter is zero, the test statistic t is ______. a 14.487 b 16.097 c 17.885 d 19.873