Boxes of Honey-Nut Oatmeal are produced to contain 15.0 ounces, with a standard deviation of 0.10 ounce. For a sample size of 64, the 3-sigma x chart control limits are: Upper Control Limit (UCL)= | ounces (round your response to two decimal places). Lower Control Limit (LCL)= | ounces (round your response to two decimal places).
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- A local supermarket spent $250,000 remodeling. Prior to remodeling, the average daily receipts were $57,500. In a sample of 18 days following the remodeling, daily receipts were $59,800, with a standard deviation of $5,460. At the 10% significance level, what can you conclude as to whether the remodeling improved daily receipts?A soft drink dispenser is designed to dispense 250 mL of drink per cup. However, there havebeen recent reports to the managements of a fast-food restaurant of both underfilled andoverfilled cups. Seeking to investigate this matter, they fill up 50 cups using this machine. If the mean amount of drink in the 50 cups is 248 mL with standard deviation of 12 mL, is there acause for concern for the management? Use a level of significance of 0.01A large university reports that the mean salary of parents of an entering class is $111,500. To see how this compares to his university, a president surveys 428 randomly selected families and finds that their average income in $109,000 with a sample standard deviation of $21,000. At the .05 significance level, can the president conclude that there is a difference?
- In a particular community, it is claimed that the mean household water usage for a particular month is 45 cubic meters. The following year, a countrywide water conservation campaign was conducted. Forty nine homes were randomly selected and found that the mean consumption is 54 cubic meters with a standard deviation of 5 cubic meters. Is there enough evidence to say that the mean household water usage per month is higher than 45 cubic meters at a = 0.01?Hinton Press hypothesizes that the average life of its largest web press is 14,500 hours. They know that the standard deviation of press life is 2,100 hours. From a sample of 25 presses, the company finds a sample mean of 13,000 hours. At a 0.01 significance level, should the company conclude that the average life of the presses is less than the hypothesized 14,500 hours?A national online business magazine reports that the average cost of a speeding ticket in Miami, including court fees, is $220. A local police department claims that this amount has increased. To test their claim, they collect data from a simple random sample of 16 drivers who have been fined for speeding in the last year. Assuming that the distribution of speeding ticket costs is normally distributed and the population standard deviation is $12, is there sufficient evidence to support the police department’s claim at the 0.01 level of significance? Speeding Ticket Costs in Miami $221 $241 $212 $245 $235 $234 $217 $218 $244 $203 $203 $239 $225 $229 $235 $211 Copy Data Step 2 of 3 : Compute the value of the test statistic. Round your answer to two decimal places. Answer Tables Keypad Keyboard Shortcuts Answer Submit Answer
- An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining that the mean out-of-pocket patient billing above the reimbursed amount was $275.66 with a standard deviation of $78.11. At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? (a) Calculate the test statistic(b)Is the null hypothesis should be rejected?A computer software vendor claims that a new version of its operating system will crash fewer than six times per year on average. A system administrator installs the operating system and claims that the new operating system will crash more than six times per year on average. At the end of year, the system administrator samples 41 computers with the new operating system and finds that the mean number of crashes on those computers for the year was 7.1 with sample standard deviation of 3.6 crashes. Can you conclude that the system administrator’s claim is correct? Use the critical value method to perform a hypothesis test at the 0.05 level of significance. a. Define the parameter we are testing and setup a hypothesis test to test the administrator’s claim: b. Calculate the test statistics for this hypothesis test. c. What is the critical value for this hypothesis test?