ason claims the average price of a good gaming laptop is at least $500. You are not so sure, and you collect data about 15 different gaming laptops. In your sample, the average price is $475 and the standard deviation is $48. You want to determine if this gives you enough evidence to refute Jason's claim at the significance level ?=0.05.   Follow the outline to complete the hypothesis test.   a. State the null and alternative hypotheses. Select your answer from one of the following options. a. ?0:?≥$500??:?<$500 b. ?0:?≤$500??:?>$500 c. ?0:?=$500??:?≠$500 d. ?0:?>$500??:?≤$500     b. Find the critical t-score for the significance level ?=0.05   Round your answer to 2 decimal places.     Which graph below best represents the rejection region for this hypothesis test?   Select your answer from one of the following options. a. Graph A b. Graph B c. Graph C     c. Calculate the standardized test statistic ?=?⎯⎯⎯−??/?√   Round your answer to 2 decimal places.       d. Draw a conclusion and interpret your result.   Select your answer from one of the following options. a. Fail to reject the null hypothesis. There is enough evidence to refute Jason's claim that the average price for a gaming laptop is at least $500. b. Fail to reject the null hypothesis. There is enough evidence to support Jason's claim that the average price for a gaming laptop is at least $500. c. Reject the null hypothesis. There is enough evidence to refute Jason's claim that the average price for a gaming laptop is at least $500. d. Reject the null hypothesis. There is enough evidence to support Jason's claim that the average price for a gaming laptop is at least $500.

You are a manager of a building that hosts the local farmers market for a town. You want to investigate if the average amount of sales for a vendor per week at your building is greater than $2040. After surveying 17 of their vendors, you find that mean sales per week of the vendors sampled was $2110 with a standard deviation of $114.03. What is the value of the test statistic for your hypothesis test? Note: 1- Only round your final answer. Round your final answer to two decimal places.

In a survey, 28 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $30 and standard deviation of $3. Find the margin of error at a 98% confidence level. Give your answer to two decimal places. ch daurfT d.bLoA

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A consumer affairs investigator records the repair cost for 4 randomly selected TVs. A sample mean of $75.89 and standard deviation of $13.53 are subsequently computed. Determine the 80% confidence interval for the mean repair cost for the TVs. Assume the population is approximately normal.  Construct the 80% confidence interval. Round your answer to two decimal places.

A. You are given the sample mean and the population standard deviation. Use this information to construct the​ 90% and​ 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. If​ convenient, use technology to construct the confidence intervals. A random sample of 40 home theater systems has a mean price of ​$127.00. Assume the population standard deviation is $19.30. Construct a​ 90% confidence interval for the population mean. The​ 90% confidence interval is   B. A study of lobster trap placement used a 95​% confidence interval to estimate the mean trap spacing​ (in meters) for the population of red spiny lobster fishermen fishing in the west coast. How many teams of fisherman would need to be sampled in order to reduce the width of the confidence interval to 6 ​meters? Assume prior knowledge indicates that the trap spacing readings for the population of red spiny lobster taken during a day are approximately…

Use five-step hypothesis testing for each of the following problems.  Number each of the five steps.  You may use the traditional method or the p-value method.   1) Science fiction novels average 250 pages in length.  The average length of 8 randomly chosen novels written by I. M. Wordy was 265 pages in length with a standard deviation of 35.  At  are Wordy's novels significantly longer than the average science fiction novel? Use five-step hypothesis testing. 2) The average monthly cell phone bill was reported to be $50.07 by the U.S. Wireless Industry.  Random Sampling of a large cell phone company found the following monthly cell phone charges (in dollars):                                                                                                                                                                                                                                                   At the 0.01 level of significance, can it be concluded that the average phone bill has…

17 dog lovers and 12 cat lovers track how much they spend on their pets each month. At the end of the month, the mean spending for cat lovers was $26.97 with a standard deviation of $14.60, and the dog lovers spending average was $18.09 with a standard deviation of $3.48.    Perform an appropriate hypothesis test to test the null hypothesis that the true mean spending for dog lovers and cat lovers are equal versus the alternative that they are different. What is the test statistic and p-value of this test?