t is wrong? a) The population standard deviation is 10, then the standard deviation of x, with line on top of it for an SRS of 10 observations is 10/10= 1. b) When taking SRS's from a population, larger sample sizes will result in larger standard deviation of x with line on. c) For an srs from a population, both mean and the standard deviation of x with line on top depend on the sample size n. d) The larger the population size N, the larger the sample size n needs to be for a desired standard deviation of X with line on top.

6.) The mean weight for bags of chips is believed to be 16oz. A researcher believes that the actual mean weight is significantly lower than this. The researcher measures the weights of a sample of 31 bags, and finds that the mean of the sample is 15oz, with a sample standard deviation of 4oz. For  = 0.01, determine if the researcher is correct.a. State the null hypothesis and the alternative hypothesis.b. Is the test left-tailed, right-tailed, or two-tailed?c. Find the test value d. Find the critical value or p valuee. Should you reject the null hypothesis?f. Summarize the results

A professor at a local community college noted that the grades of his students were normally distributed with a mean of 84 and a standard deviation of 6. The professor has informed us that 10 percent of his students received A's while only 2.5 percent of his students failed the course and received F's.   a. To the nearest tenth, what is the minimum score needed to make an A?   b. To the nearest tenth, what is the maximum score among those who received an F?   c. If there were 4 students who did not pass the course, how many students took the course?

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2500 grams and a standard deviation of 800 grams while babies born after a gestation period of 40 weeks have a mean weight of 3000 grams and a standard deviation of 385 grams. If a 32​-week gestation period baby weighs 2650 grams and a 41​-week gestation period baby weighs 3150 ​grams, find the corresponding​ z-scores. Which baby weighs more relative to the gestation​ period? Find the corresponding​ z-scores. Which baby weighs relatively more​? Select the correct choice below and fill in the answer boxes to complete your choice. ​(Round to two decimal places as​ needed.)   A. The baby born in week 41 weighs relatively more since its​ z-score, nothing​, is smaller than the​ z-score of nothing for the baby born in week 32.   B. The baby born in week 32 weighs relatively more since its​ z-score, nothing​, is smaller than the​ z-score of nothing for the baby born in week 41.   C. The…