The latest model of a certain brand of electric car is reported to have an average...
According to a study conducted two years ago by the Organisation for Economic Cooperation and Development (OECD), the average length of stay in a hospital was 16.2 days in Japan. A researcher in Japan suspects that the average length of stay in a hospital has actually increased in Japan since the study was released by the OECD two years ago. To test her suspicion, the researcher selected a random sample of 111 hospital patients in Japan and calculated the average...
A certain drug is used to treat asthma. In a clinical trial of the? drug, 26 of 255 treated subjects experienced headaches? (based on data from the? manufacturer). The accompanying calculator display shows results from a test of the claim that less than 99?% of treated subjects experienced headaches. Use the normal distribution as an approximation to the binomial distribution and assume a 0.01 significance level to complete parts? (a) through? (e) below. a. Is the test? two-tailed, left-tailed, or?...
Two different models of a car manufacturer are compared to see if Model A has a higher average miles per gallon (mpg) than Model B. A sample of size 14 Model A cars found a sample average of 28.2 mpg and a standard deviation 3.0 mpg. A sample of size 10 Model B cars found a sample average of 22.6 mpg and a standard deviation of 5.1 mpg. Conduct the appropriate hypothesis test. a. Ho: μA = μB Ha: μA...
question #12 A certain drug is used to treat asthma. In a clinical trial of the drug, 27 of 257 treated subjects experienced headaches (based on data from the manufacturer). The accompanying calculator display shows results from a test of the claim that less than 11% of treated subjects experienced headaches. Use the normal distribution as an approximation to the binomial distribution and assume a 0.05 significance level to complete parts (a) through (e) below. 1-Prop Test prop<0.11 2- -0.253169571...
A certain drug is used to treat asthma. In a clinical trial of the drug, 27 of 292 treated subjects experienced headaches (based on data from the manufacturer). The accompanying calculator display shows results from a test of the claim that less than 8% of treated subjects experienced headaches. Use the normal distribution as an approximation to the binomial distribution and assume a 0.01 significance level to complete parts (a) through (e) below. 1-PropZTest prop<0.08 z=0.785183294 p=0.7838269455 p=0.0924657534 n=292 a....
please show all work A certain drug is used to treat asthma. In a clinical trial of the drug. 27 of 285 treated subjects experienced headaches (based on data from the manufacturer). The accompanying calculator display shows results from a test of the claim that less than 10% of treated subjects experienced headaches. Use the normal distribution as an approximation to the binomial distribution and assume a 0.05 significance level to complete parts (a) through (e) below. peop<0.1 2-Prop Teas...
The sample data consist of 23 houses from a specific city yielded the average house price $226,460 and the standard deviation of the house price $11,500. Use a significance level 0.01 to test whether the mean house price of the whole city is more than $220,000. Compute the value of the test statistic, and P-value for the specified hypothesis test and state your conclusion. Assume the house prices of this city follows normal distribution. Question 2 options: Test statistic: t...
The sample data consist of 23 houses from a specific city yielded the average house price $226,460 and the standard deviation of the house price $11,500. Use a significance level 0.01 to test whether the mean house price of the whole city is more than $220,000. Compute the value of the test statistic, and P-value for the specified hypothesis test and state your conclusion. Assume the house prices of this city follows normal distribution. Test statistic: t = 2.69, p-value...
To obtain information on the corrosion-resistance properties of a certain type of steel conduit, 45 specimens are buried in soil for a 2-year period. The maximum penetration (in mils) for each specimen is then measured, yielding a sample average penetration of x = 52.9 and a sample standard deviation of s = 4.3. The conduits were manufactured with the specification that true average penetration be at most 50 mils. They will be used unless it can be demonstrated conclusively that...
To obtain information on the corrosion-resistance properties of a certain type of steel conduit, 45 specimens are buried in soil for a 2-year period. The maximum penetration (in mils) for each specimen is then measured, yielding a sample average penetration of x = 52.8 and a sample standard deviation of s = 4.3. The conduits were manufactured with the specification that true average penetration be at most 50 mils. They will be used unless it can be demonstrated conclusively that...