Prior to the virus outbreak in Maine, a pound of flour cost 75 cents. You sample 112 grocery stores and find that the average cost is X-bar = 88 cents with a standard deviations = 9 cents. You want to see if this is significantly higher than the cost before the outbreak, so you test the following hypotheses: Ho: µ s 75 and Ha: µ > 75. What is the standard error of the mean? Round your answer to three decimal places. In this problem, do not convert the cents to decimal format.

This problem is fill in the blank.  Just choose the correct answers.  Thank you for your help   A scientist has read that the mean birth weight, μ, of babies born at full term is  7.2 pounds. The scientist, believing that μ is less than this value, plans to perform a statistical test. She selects a random sample of birth weights of babies born at full term and finds the mean of the sample to be 6.9 pounds and the standard deviation to be 1.7 pounds.   Based on this information, answer the questions below. What are the null hypothesis (H0) and the alternative hypothesis (H1) that should be used for the test? H0:  (choose one) less than, less than or equal to, greater than, greater than or equal to, equal to, or not equal to.      (choose one)      6.9 pounds, 7.2 pounds, or 1.7 pounds. H1: (Choose one) less than, less than or equal to, greater than, greater than or equal to, equal to, or not equal to.          (Choose one)     6.9 pounds, 7.2 pounds, or 1.7 pounds.     In the context…

i need help solving this homework question: the lengths of nails (in millimeters) at a certain plant are normally distributed with a mean of 20.00 and a standard deviation of 0.21. nails produced will be rejected unless their lengths are between 19.71 mm and 20.42 mm. what percent of the nails are accepted?

Find the area, square unit, to the nearest thousandth of the standard deviation between the given z-scores. Z equals 1.12 and z equals 1.73.