Jump to level 1 A rods manufacturer makes rods with a length that is supposed to be 17 inches. A quality control technician sampled 24 rods and found that the sample mean length was 17.09 inches and the sample standard deviation was 0.25 inches. The technician claims that the mean rod length is more than 17 inches. What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex: 20 Does sufficient evidence exist at the a = 0.1 significance level to support the technician's claim? Select ✓ Check Next 2 4

Jump to level 1 A rods manufacturer makes rods with a length that is supposed to be 17 inches. A quality control technician sampled 24 rods and found that the sample mean length was 17.09 inches and the sample standard deviation was 0.25 inches. The technician claims that the mean rod length is more than 17 inches. What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex: 20 Does sufficient evidence exist at the a = 0.1 significance level to support the technician's claim? Select ✓ Check Next 2 4

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Using the Hypothesis Testing Procedures, please complete: The average production of peanuts in Virginia is 3000 pounds per acre. A new plant food has been developed and is tested on 60 individual plots of land. The mean yield with the new plant food is 3120 pounds of peanuts per acre, the population standard deviation is 578 pounds. At a = 0.05, can you conclude that the average production has increased?
Sales at a fast-food restaurant average $6,500 per day. The restaurant decided to introduce an advertising campaign to increase daily sales. To determine the effectiveness of the advertising campaign, a sample of 64 days of sales were taken. They found that the average daily sales were $6,600 per day. From past history, the restaurant knew that its population standard deviation is about $1,000. The value of the test statistic is _______. Multiple Choice .80 6.50 6.60 2.01
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What is the p-value for this sample? The significance level is a 0.005. The standard deviation is 13.2. The sample mean is 60.4. The samle size is 35. The test statistic is 0.986
The commercial for the new Meat Man Barbecue claims that it takes 20 minutes for assembly. A consumer advocate thinks that the assembly time is lower than 20 minutes. The advocate surveyed 10 randomly selected people who purchased the Meat Man Barbecue and found that their average time was 19 minutes. The standard deviation for this survey group was 2.3 minutes. What can be concluded at the the a = 0.10 level of significance level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? Select an answer H₁: ? Select an answer ✓ c. The test statistic ? ✓ = d. The p-value= e. The p-value is ? ✓ a f. Based on this, we should Select an answer the null hypothesis. (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.)
An engineer designed a valve that will regulate water pressure on an automobile engine. The engineer designed the valve such that it would produce a mean pressure of 7.4 pounds/square inch. It is believed that the valve performs above the specifications. The valve was tested on 190 engines and the mean pressure was 7.5 pounds/square inch. Assume the standard deviation is known to be 0.9. A level of significance of 0.1 will be used. Determine the decision rule. Enter the decision rule. 画 Tables E Keypad Answer How to enter your answer Keyboard Shortcuts Reject Ho if z > | Submit Answer O 2020 Hawkes Learning MacBook Air 888 DII esc F3 F4 FS F7 23 $ & 1 2 3 4 6 8 { Q W E R Y P D F G H J K ? C V option command command option : - .. - | ' V is
Wind power Should you generate electricity with yourown personal wind turbine? That depends on whetheryou have enough wind on your site. To produce enoughenergy, your site should have an annual average windspeed above 8 miles per hour, according to the WindEnergy Association. One candidate site was monitored fora year, with wind speeds recorded every 6 hours. A totalof 1114 readings of wind speed averaged 8.019 mph witha standard deviation of 3.813 mph. You’ve been asked tomake a statistical report to help the landowner decidewhether to place a wind turbine at this site.a) Discuss the assumptions and conditions for usingStudent’s t inference methods with these data. Hereare some plots that may help you decide whether themethods can be used:b) What would you tell the landowner about whether thissite is suitable for a small wind turbine? Explain.
Chell is testing several types of boots for durability when falling a long distance. She found six types of boots. For each boot she drops from increasing heights until she is injured. Her overall average was 72.5 feet, with a pooled standard deviation of 6.4. The data for each type is shown below. Number ofboots Std Dev(for each boot) Mean height(in feet) Steel 24 6.9 69.5 Titanium 7 8.9 69.4 Vibranium 18 5.2 73.3 Mithril 8 5.9 74.5 Netherite 13 4.4 75.4 Atium 15 7.2 74.2 Assuming normality and equal variances perform a hypothesis test.Use three decimal places in the table
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Give: rejection region, test statistic, p-value, and conclusion please.
Watching TV: The 2012 general Social Survey asked a large number of people how much time they spent watching TV each day. The mean number of hours was 3.09 with a standard deviation of 2.9. Assume that in a sample of 37 teenagers, the sample standard deviation of daily TV time is 2.2 hours, and that the population of TV watching times is normally distributed. Can you conclude that the population standard deviation of TV watching times for teenagers differs from 2.9? Use the a=0.10 level of significance.
MC Qu. 10-64 Sales at a fast-food restaurant average... Sales at a fast-food restaurant average $6,000 per day. The restaurant decided to introduce an advertising campaign to Increase daily sales. In order to determine the effectiveness of the advertising campaign, a sample of 49 day's sales were taken. The sample showed average daily sales of $6,300. From past history, the restaurant knew that its population standard deviation is about $1,000. If the level of significance is 0.01, have sales increased as a result of the advertising campaign? Multiple Choice Fail to reject the null hypothesis. Reject the null hypothesis and conclude the mean is higher than $6,000 per day. Reject the null hypothesis and conclude the mean is lower than $6,000 per day. Reject the null hypothesis and conclude that mean equal to $6,000 per day.