You intend to estimate a population mean with a confidence interval. You believe the population to have a normal distribution. Your sample size is 8. Find the critical value that corresponds to a confidence level of 80%. (Report answer accurate to three decimal places.) t₁/2 = ± Submit Question

I need help answering parts 4 and 5

Thank you!

Cereals sodium values have a mean of 167 and a standard deviation of 77.3. Find the z-score for the cereal that has a sodium value of 0. How would you interpret this z-score?

Plz help asap t7.

I need help solving

Most people think that the​ "normal" adult body temperature is 98.6degrees°F. In a more recent​ study, researchers reported that a more accurate figure may be 98.198.1degrees°F. ​Furthermore, the standard deviation appeared to be around 0.60.6degrees°F. Assume that a Normal model is appropriate. Complete parts a through c below.       Question content area bottom Part 1 ​a) In what interval would you expect most​ people's body temperatures to​ be? Explain. Select the correct choice below and fill in the answer​ box(es) to complete your choice.     A. Using the​ 68-95-99.7 Rule, about​ 95% of the body temperatures are expected to be less than enter your response heredegrees°F. ​(Round to one decimal place as​ needed.)   B. Using the​ 68-95-99.7 Rule, about​ 95% of the body temperatures are expected to be between enter your response heredegrees°F and enter your response heredegrees°F. ​(Use ascending order. Round to one decimal place as​ needed.)   C. Using the​…

You measure 46 turtles' weights, and find they have a mean weight of 36 ounces. Assume the population standard deviation is 3.4 ounces. Based on this, construct a 80% confidence interval for the true population mean turtle weight.Give your answers as decimals, to two places  ¯x                 ±                 M.O.E._________ ±  ________ounces

Hospital Noise Levels Noise levels at various area urban hospitals were measured in decibels. The mean noise level in  169  ward areas was  60.3  decibels, and the population standard deviation is  6.1 . Find the  96%  confidence interval of the true mean. Use a graphing calculator and round the answers to one decimal place.

Prison Sentences The average length of prison term in the United States for white collar crime is 34.9 months. A random sample of 40 prison terms indicated a mean stay of 28.8 months with a standard deviation of 8.9 months. At α=0.01, is there sufficient evidence to conclude that the average stay differs from 34.9 months? Use the   P-value method. Use a graphing calculator.  Find the P-value. Round the answer to at least four decimal places.  P-value=