The firmness of a piece of fruit is an important indicator of fruit ripeness. The Magness-Taylor firmness was determined for one sample of 20 golden apples with a shelf life of zero days, resulting in a sample mean of 8.74 and sample standard deviation of 0.66, and another sample of 20 apples with a shelf life of 20 days, with a sample mean and sample standard deviation of 4.96 and 0.39, respectively.
(a) Calculate a confidence interval for the differences between the true average firmness of zero-day apples and true average firmness of 20-day apples using a confidence level of 95%.
(b) Test with significance level 5% whether there is a difference between the true average firmness of zero-day apples and true average firmness of 20-day apples.
The firmness of a piece of fruit is an important indicator of fruit ripeness. The Magness-Taylor firmness was determined for one sample of 20 golden apples with a shelf life of zero days, resulting in a sample mean of 8.74 and sample standard deviation of
An article reported that for a sample of 54 kitchens with gas cooking appliances monitored during a one-week period, the sample mean CO2 level (ppm) was 654.16, and the sample standard deviation was 162. a) Calculate and interpret a 95% two sided answers to two decimal places.) confidence interval for true average CO2 level n the population of a homes from hich the sample as selected Round your ppm Interpret the resulting interval o we are 95% confident that the...
STA2221 examples on CI & Testing of Hypothesis Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answer the question Provide an appropriate response. 1) Find the critical value,te for 0.99 and n-10. A) 3.250 B) 3.169 1.833 D) 2.262 2) Find the critical value to forc=0.95 and n=16. A) 2.947 B) 2.602 2120 D) 2.131 3) Find the value of E, the margin of error, for A) 1.69 B) 0.42 0.99, n=16 and s=2.6. C)...