A popular nutritional magazine reported in 2017 that the average per serving calorie content for cold cereals is 110 g. A 2015 random sample of 76 cold bowls of cereal had a mean of 107 g per serving with a standard deviation of 20 g. To conduct a hypothesis test to determine whether the mean calorie content for cold cereals is different in 2016 than in 2017 what would be the null and alternative hypothesis.
Solution :
This is the two tailed test .
The null and alternative hypothesis is ,
H0 :
= 110
Ha :
110
A popular nutritional magazine reported in 2017 that the average per serving calorie content for cold...
Suppose production specifications for a new energy drink require exactly 40 mg of vitamins per serving. Fred, a quality control engineer, suspects that the production process does not ensure each serving contains 40 mg of vitamins, on average To test his suspicions, Fred collects a random sample of 8 servings and determines their average vitamin content to be 34.9985 mg with a standard deviation of 6.9871 mg. Fred uses a 95% confidence interval to test the null hypothesis Ho: μ-μο...
I need to test a hypothesis regarding drunk driving: i.e., that a higher blood alcohol content of 0.08+ causes a higher rate of drunk driving fatalities, than a lower blood alcohol content of 0.01-0.07. This is to prove that the American BAC level should be lowered from 0.08 to a range of 0.01-0.07 to reduce drunk driving fatalities. I chose a random sample of 10 U.S. states: 1) Total Fatalities for 2016 and 2015, 2) Total fatalities with a driver’s...
#1: Food scientists and nutritionists at the Sale Mart Supermarket chain want to estimate the true mean cholesterol content in their house brand blocks of Colby Jack cheese. Industry standards indicate that the population standard deviation is 2.5 mg. Determine the minimum sample size necessary to estimate to within 0.5 mg of the true population mean and with 95% confidence. (a) 95 (b) 96 (c) 97 (d) 98 (e) None of these answers #2: Food scientists and nutritionists at...