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Compute the mean and the standard deviation of the sample 1. You are given the following information obtained from a random sample of 4 observations. 25 47 32 56 You want to determine whether or not the mean of the population from which this sample was taken is significantly different from 48. (Assume the population is normally distributed.) a. State the null and the alternative hypotheses. b. Determine the test statistic. c. Det ...

Other / Other 20 Apr 2016

What is the p-value associated with the sample results 1. A soft drink filling machine, when in perfect adjustment, fills the bottles with 12 ounces of soft drink. A random sample of 49 bottles is selected, and the contents are measured. The sample yielded a mean content of 11.88 ounces with a standard deviation of 0.35 ounces. a. Formulate the hypotheses to test to determine if the machine is in perfect adjustment. b. Compute the val ...

Other / Other 20 Apr 2016

Determine the standard error of the proportion 1. Consider the following hypothesis test: Ho:  38 Ha:  > 38 You are given the following information obtained from a random sample of six observations. Assume the population has a normal distribution. X 38 40 42 32 46 42 a. Compute the mean of the sample b. Determine the standard deviation of the sample. c. Determine the standard error of the mean. d. Compu ...

Other / Other 20 Apr 2016

A student believes that the average grade on the statistics 1.Identify the null and alternative hypotheses for the following problems. a. The manager of a restaurant believes that it takes a customer less than or equal to 25 minutes to eat lunch. b. Economists have stated that the marginal propensity to consume is at least 90¢ out of every dollar. c. It has been stated that 75 out of every 100 people who go to the movies on Saturd ...

Other / Other 20 Apr 2016

Compute the standard error of the mean 1. You are given the following information obtained from a random sample of 5 observations. Assume the population has a normal distribution. 20 18 17 22 18 You want to determine whether or not the mean of the population from which this sample was taken is significantly less than 21. a. State the null and the alternative hypotheses. b. Compute the standard error of the mean . c. Determine the ...

Other / Other 20 Apr 2016

Determine the critical value for this test 1. Automobiles manufactured by the Efficiency Company have been averaging 42 miles per gallon of gasoline in highway driving. It is believed that its new automobiles average more than 42 miles per gallon. An independent testing service road-tested 36 of the automobiles. The sample showed an average of 42.8 miles per gallon with a standard deviation of 1.2 miles per gallon. a. With a 0.05 le ...

Other / Other 20 Apr 2016

State the hypotheses to determine whether the proportion of odd numbers 1. A law enforcement agent believes that at least 88% of the drivers stopped on Saturday nights for speeding are under the influence of alcohol. A sample of 66 drivers who were stopped for speeding on a Saturday night was taken. Eighty percent of the drivers in the sample were under the influence of alcohol. a. State the null and alternative hypotheses. b. Compute ...

Other / Other 20 Apr 2016

What is the p-value associated with the sample results 1. A lathe is set to cut bars of steel into lengths of 6 centimeters. The lathe is considered to be in perfect adjustment if the average length of the bars it cuts is 6 centimeters. A sample of 121 bars is selected randomly and measured. It is determined that the average length of the bars in the sample is 6.08 centimeters with a standard deviation of 0.44 centimeters. a. Formula ...

Other / Other 20 Apr 2016

State the null and the alternative hypotheses 1. In the past, the average age of employees of a large corporation has been 40 years. Recently, the company has been hiring older individuals. In order to determine whether there has been an increase in the average age of all the employees, a sample of 64 employees was selected. The average age in the sample was 45 years with a standard deviation of 16 years. Let  = .05. a. State the ...

Other / Other 20 Apr 2016

Compute the sample mean and the standard deviation 1. A group of young businesswomen wish to open a high fashion boutique in a vacant store but only if the average income of households in the area is at least $25,000. A random sample of 9 households showed the following results. $28,000 $24,000 $26,000 $25,000 $23,000 $27,000 $26,000 $22,000 $24,000 Assume the population of incomes is normally distributed. a. Compute the sam ...

Other / Other 20 Apr 2016