In a sample of 38 observations, you calculate a sample standard deviation of 6. To test Ho : o = 20 against the alternative Ha: a 20, what is the value of your test statistic? %3D O 66.6 O 123.21 O 11.1 O 68.4
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- The average cost of tuition plus room and board for a small private liberal arts college is reported to be $8500 per term but I financial administrator boys that the average cost is half a study conducted using 350 small liberal arts colleges showed that the average cost per term is $8745 the population standard deviation is $1200 let a =0.05.what is the p-value for this testCalculate the sample size to study the average age of a Central State College student, plus or minus 0.4 years. We’d like to be 85% confident about our result. From a previous study, we know that the standard deviation for the population is 2.8.ASAP Exercise 7-48 (Algo) (LO7-3) According to a government study among adults in the 25- to 34-year age group, the mean amount spent per year on reading and entertainment is $2,125. Assume that the distribution of the amounts spent follows the normal distribution with a standard deviation of $439. (Round your z-score computation to 2 decimal places and final answers to 2 decimal places.) a. What percent of the adults spend more than $2,400 per year on reading and entertainment? b. What percent spend between $2,400 and $3,400 per year on reading and entertainment? c. What percent spend less than $1,000 per year on reading and entertainment?
- Is it true or false that the least absolute deviations (LAD) estimator minimizes the sum of the absolute value of the population errors.a. 36 Out of 100 persons interviewed are familiar with the tax incentive given by the governmenti for installing solar panel, construct 96% confidence interval for true proportion. b. The average wages of 25 employees of a company are RS. 2500 with standard deviation of Rs. 250. Assuming wages to be normally distributed, calculate 98% confidence upper bound for the average wages and interpret it.For x = 15, n = 35 test the claim that p > 0.3
- There answer is not AQ.3 What is the difference between ordinary least square and maximum likelihood ( ML ) estimators ? Also discuss their properties ?12 A researcher reports survey results by stating that the margin of error for the 95% middle interval of the sample means is 44.75. The population variance is assumed to be σ² = 18750. The sample size used in this survey is ________. a 53 b 44 c 36 d 31
- Suppose that (Yi, Xi) satisfy the least squares assumptions . A random sample of size n = 250 is drawn and yields ^Y= 5.4 + 3.2X, R2 = 0.26, SER = 6.2. (3.1) (1.5)a. Test H0 : β1 = 0 vs. H1 : b1 | 0 at the 5% level.b. Construct a 95% confidence interval for β1.c. Suppose you learned that Yi and Xi were independent. Would you besurprised? Explain.d. Suppose that Yi and Xi are independent and many samples of sizen = 250 are drawn, regressions estimated, and (a) and (b) answered.In what fraction of the samples would H0 from (a) be rejected? Inwhat fraction of samples would the value β1 = 0 be included in theconfidence interval from (b)?Engineers must consider the breadths of male heads when designing helmets. The company researchers have determined that the population of potential clientele have head breadths that are normally distributed with a mean of 6.6-in and a standard deviation of 0.9-in.In what range would you expect to find the middle 50% of most head breadths? Between _____________ and __________________.If you were to draw samples of size 37 from this population, in what range would you expect to find the middle 50% of most averages for the breadths of male heads in the sample? Between _______________ and ________________.Enter your answers as numbers. Your answers should be accurate to 2 decimal placeConsider the following data: −11,−5,−5,−11,13,−11,−5−11,−5,−5,−11,13,−11,−5 Copy Data Step 2 of 3: Calculate the value of the sample standard deviation. Round your answer to one decimal place.