Eat your cereal: Boxes of cereal are labeled as containing 14 ounces. Following are the weights, in ounces, of a sample of 12 boxes. It is reasonable to assumethat the population is approximately normal.13.03 14.98 13.12 13.13 13.11 13.0313.16 14.98 13.06 13.05 13.12 13.13Send data to ExcelPart: 0/2Part 1 of 2(a) Construct a 95% confidence interval for the mean weight. Round the answers to at least three decimal places.A 95% confidence interval for the mean weight is | <με Π.X3∞AB9 Sound it out: Phonics is an instructional method in which children are taught to connect sounds with letters or groups of letters. A sample of 133 first-graderswho were learning English were asked to identify as many letter sounds as possible in a period of one minute. The average number of letter sounds identifiedwas 34.21 with a standard deviation of 23.33.Part: 0/2Part 1 of 2(a) Construct a 99.9% confidence interval for the mean number of letter sounds identified in one minute. Round the answers to at least two decimalplaces.A 99.9% confidence interval for the mean number of letter sounds identified in one minute is<μ<.XS8B19

As per our guidelines we are suppose to answer only one question1)Given data is…

Answered: Eat your cereal: Boxes of cereal are…

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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How much customers buy is a direct result of how much time they spend in the store. A study of average shopping times in a large national houseware store gave the following information (Source: Why We Buy: The Science of Shopping by P. Underhill). Women with female companion: 8.3 min.Women with male companion: 4.5 min. Suppose you want to set up a statistical test to challenge the claim that a woman with a female friend spends an average of 8.3 minutes shopping in such a store. (a) What would you use for the null and alternate hypotheses if you believe the average shopping time is less than 8.3 minutes? Ho: ? = 8.3; H1: ? ≠ 8.3Ho: ? < 8.3; H1: ? = 8.3 Ho: ? = 8.3; H1: ? < 8.3Ho: ? = 8.3; H1: ? > 8.3 Is this a right-tailed, left-tailed, or two-tailed test? right-tailedtwo-tailed left-tailed (b) What would you use for the null and alternate hypotheses if you believe the average shopping time is different from 8.3 minutes? Ho: ? = 8.3; H1: ? > 8.3Ho: ? ≠ 8.3; H1: ? = 8.3…
Some college graduates employed full-time work more than 40 hours per week, and some work fewer than 40 hours per week. We suspect that the mean number of hours worked per week by college graduates, µ, is less than 40 hours and wish to do a statistical test. We select a random sample of college graduates employed full-time and find that the mean of the sample is 37 hours and that the standard deviation is 3 hours. Based on this information, answer the questions below. What are the null hypothesis (H,) and the alternative hypothesis (H ,) that should be used for the test? H:u is 7 In the context of this test, what is a Type I error? АТурe I error is 7 fact, u is 7 | the hypothesis that µ is ? when, in Suppose that we decide not to reject the null hypothesis. What sort of error might we be making? ?
n the 1992 presidential election, Alaska's 40 election districts averaged 2111 votes per district for President Clinton. The standard deviation was 551. (There are only 40 election districts in Alaska.) The distribution of the votes per district for President Clinton was bell-shaped. Let X = number of votes for President Clinton for an election district. (Source: The World Almanac and Book of Facts) Round all answers except part e. to 4 decimal places.a. What is the distribution of X? X ~ N(,)b. Is 2111 a population mean or a sample mean? Select an answer Population Mean Sample Mean c. Find the probability that a randomly selected district had fewer than 2134 votes for President Clinton. d. Find the probability that a randomly selected district had between 2048 and 2241 votes for President Clinton. e. Find the first quartile for votes for President Clinton. Round your answer to the nearest whole number.
Participant Keyboard A Keyboard B Keyboard C Keyboard D A 6. 3. -- 4 4 -- -- E 4 6. -- -- Are the data enough to conclude that there are significant differences in typing performance among the four keyboard designs. Test with a = .05. 2. 3.
Which one of the values below represents a lower quartile for the data set 23, 24, 21, and 20? a. O22.0 b. O22.5 20.25 C. d. O23.5 e. Onone of these
INSTRUCTION: Perform an appropriate statistical test using the dataset (Sheet name: Autism) if a researcher would like to determine if there is a significant difference between "Autistic," "Normal," and "Mentally Retarded"? The researcher took measurements of the serum concentration of an antigen in three groups of children (Autistic, Normal, and Mentally Retarded). Dataset for this can be retrieved on the given Excel. 1. What is the computed p-value for the given data on "Autism"? Round it off to two decimal places. Then, answer (YES or NO) if there is a significant difference in the serum concentration of antigen between "Autistic," "Normal," and "Mentally Retarded"? 2. What is the computed Mean of "Mentally Retarded" on the given data for Autism? Round it off to two decimal places. 3. What is the computed Standard Deviation of the "Autistic" group on the given data for Autism? Round it off to two decimal places.
please answer this question.. my homework is due in and im so confused .. please help Data table X Jard position, Autopitc executive Neil Geism Sample Size, n Mean Factor, Upper Range, DA Lower Range, D3 A2 1.880 3.268 3 1.023 2.574 4. 0.729 2.282 0.577 2.115 0.483 2.004 0.419 1.924 0.076 8. 0.373 1.864 0.136 0.337 1.816 0.184 10 0.308 1.777 0.223 12 0.266 1.716 0.284 Refer to the table EaclorSOComouino Conrokch LmiKEama for this problem. Autopitch devices are made for both major- and minor-league teams to help them improve their batting averages. When set at the standard position, Autopitch can throw hardballs toward a batter at an average speed of 53 mph. To monitor these devices and to maintain the highest quality, Autopitch executive Neil Geismar takes samples of 9 devices at a time. The average range is 4 mph. a) Using this information, construct control limits for the x-chart. UCL,-mph (round your response to three decimal places). LCL, mph (round your response to three decimal…
Forty students took a 50 point computer science test. The scores are shown in the stem and leaf plot: 0l1 7 1|1 1 4 6 210 2 5 8 8 9 312 6 9 414 6 8 510 0 What is the third quartile of the scores? O41 O 44 O 39.5 43.5 O 41.5
3. Using the two tables of output below, write three summary statements in APA format. Be sure you report results such as Mean and SD in proper APA format. Coffee refers to the amount of money spent on coffee in the previous week, soda refers to the amount of money spent on soda in the previous week, and sleep refers to the average daily number of hours spent sleeping in the previous week. Descriptive Statistics Mean Std. Deviation coffee 7.5500 9.62166 20 soda 6.1000 6.79706 20 sleep 7.2625 1.38001 20
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