A normal distribution has a mean of 50 and a standard deviation of 4.

A normal distribution has a mean of 50 and a standard deviation of 4. Please use Execl Spreadsheet Show all work and Formulas a) Compute the probability of a value between 44.0 and 55.0 Show your work here Answer b) Compute the probability of a value greater than 55.0 Show your work here Answer c) Compute the probability of a value between 52.0 and 55.0 Show your work here Answer

Bob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. From his records, he selects a random sample of 60 sales and finds the mean number of gallons sold is 8.60 and the standard deviation is 2.30 gallons.

Bob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. From his records, he selects a random sample of 60 sales and finds the mean number of gallons sold is 8.60 and the standard deviation is 2.30 gallons. PLease Show all work in excel Spread Sheet with formulas a) What is the point estimate of the population mean? Answer below b) Develop a 99% confidence interval for the population mean. Low Level High Level your work here c) Interpret the mea... click for more

At the 0.10 significance level, can we conclude that less than 90% of the orders are delivered in less than 10 minutes?

Chicken Delight claims that 90% of its orders are delivered within 10 minutes of the time the order is placed. A sample of 100 orders revealed that 82 were delivered within the promised time. At the 0.10 significance level, can we conclude that less than 90% of the orders are delivered in less than 10 minutes? Please show all work in Excel spread sheet with formulas Null Hypothesis Alternate Hypothesis Alpha Choice of test Critical value of test Show your work to compute the test in this area. Answer to test you calculated. Interpret your findings

The Tampa bay (Florida) Area Chamber of Commerce wanted to know whether the mean weekly salary of nurses was larger than that of school teachers. To investigate, they collected the following information on the amounts earned last week by a sample of school teachers and nurses.

The Tampa bay (Florida) Area Chamber of Commerce wanted to know whether the mean weekly salary of nurses was larger than that of school teachers. To investigate, they collected the following information on the amounts earned last week by a sample of school teachers and nurses. Pease show work with formulas in Excel Spread sheet Questions: Is it reasonable to conclude that the mean weekly salary of nurses is higher? What is the p value? Teachers Nurses - Null Hypothesis 845 841 - 826 890 - Alternate Hypothesis Alpha 0.01 Given 827 821 - ... click for more

ROA, debt/equity, ROE

Can you walk me through the steps to solve these problems? Lily Cosmetics has annual sales of $400,000,000 maintains a net after tax profit margin of 5% and has a sales-to-assets ratio of 4 a. What is its return on assets? b. If its debt/equity ratio is 1.0 , what is the return on equity?