The mean number of credits earned by students is claimed to be 30.0. A random sampleis taken to test if the mean is different. The sample has x = 31.2 s= 2.1, and n= 40.%3DUse this data to solve problems 7 through 11.The stem and leaf plot below shows the running times in a 400 m run for a randomsample of 19 runners. 6|0 represents 60 seconds. Use this data for questions 18through 21.5|896|015587|02466898|12335For a one samplet-test with sample size 58, the degrees of freedom is:а. 58O b. 59О с. 57 Using the data on no. 2:A one sample ttest is conducted with H a: µ > 14. If t= 2.08and n= 31, the p-value isO a. between 0.02and 0.025O b. between 0.01and 0.02O c. between 0.005 and 0.01

TO find, 1) For a one sample t test with sample size 58 , the degrees of freedom is: 2) For one…

Answered: Using the data on no. 2: A one sample…

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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Find the P-value (to 4 decimals) for a x test with d. f. = 9 and STS x = 1.6 if the test is: a. Left tailed: b. Right tailed: c. Two-tailed: Submit Question
State the hypothesis and identify the claim. Find the critical and z-values.
Scores on the SAT form a normal distribution with a mean of µ = 500 with σ = 100. If the state college only accepts students who score in the top 60% on the SAT, what is the minimum score needed to be accepted? a. X = 525 b. X = 560 c. X = 440 d. X = 475
Carboxyhemoglobin is formed when hemoglobin is exposed to carbon monoxide. Heavy smokers tend to have a high percentage of carboxyhemoglobin in their blood.t Let x be a random variable representing percentage of carboxyhemoglobin in the blood. For a person who is a regular heavy smoker, x has a distribution that is approximately normal. A random sample of n = 12 blood tests given to a heavy smoker gave the following results (percent carboxyhemoglobin in the blood). Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value a small amount and thereby produce a slightly more "conservative" answer. 9.1 9.8 10.4 9.8 11.3 12.2 11.6 10.3 8.9 9.7 13.4 9.9 (a) Use your calculator to calculate x and s. (Round your answers to four decimal places.) X = S = (b) A long-term population mean u = 10% is considered a health risk. However, a long-term population mean above 10% is considered a…
touch ".llE 55% D14:52 Question Measurements for the length and width of a rectangular plastic covers for CDs are Tounded to the nearest mm (so they are discrete). Let X denote the length and Y dente the width. The possible values of X are 129, 130, and 131 mm. The possible values of Y are 15 and 16 mm. The joint distribution is given by the following table X-length 129 130 131 Y=width 15 0.12 0.42 006 16 0.08 0.28 0.04 The probability that a CD cover has width of 16 mm knowing that it has a length of 131 mm is O 0.13 O 0.2 O 0.4 O 0.08
Let sample size n = 51. Find P (t > 4.92). a. 0.0005 < P (t > 4.92) < 0.001 b. 0.001 < P (t > 4.92) < 0.0025 c. P (t > 4.92) < 0.0005 d. P (t > 4.92) > 0.25
Find the standardized test statistic t for a sample with n= 15, x= 10.2, s 0.8, and a= 0.05 if H: H 2 9.9. Round your answer to three decimal places. A. 1.728 B. 1.452 C. 1.631 D. 1.312 Click to select your answer. P Type here to search a +66 hp 2) 立

A researcher reports t(26) = 2.71 for a two independent samples t-test. How many participants were in the entire experiment? a. 28 b. 27 c. 30 d. cannot determine with the information provided
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A researcher wishes to see if there is a difference between the mean number of hours per week that a family with no children participates in recreational activities and a family with children participates in recreational activities. She selects two random samples and the data are shown. Use μ1 for the mean number of families with no children. At α=0.01 , is there a difference between the means? Use the P -value method and tables. X σ n No children 8.6 2.6 22 Children 10.1 2.7 22 (a) State the hypothesis and identify the claim with the correct hypothesis. H0: ▼(Choose one) H1: ▼(Choose one) This hypothesis test is a ▼(Choose one) test. (b)Find the critical value(s). Round the answer to 3decimal places, if necessary. If there ismore than one critical value, Critical values: (c)Compute the test value. Round the answer to at least 3 decimal places, if necessary. z= Compute the P -value. Round the answer to four…
1:37 PM Wed Apr 21 * 72% 88 Q Stats Exam •.. Untitled Notebook (1) Stats Exam 37. The manager of Green Valley medical center claims that the median number of patients seen by doctors who work at the center is 85. To test this claim, 20 days are randomly selected and the number of patients seen is recorded as shown. At a=0.1, test the claim. (Use sign test) 86 82 90 88 85 85 94 93 69 61 89 90 91 94 78 85 71 77 69 77

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Using the data on no. 2: A one sample t-test is conducted with H a: u > 14. If t= 2.08 and n= 31, the p-value is a. between 0.02 and 0.025 O b. between 0.01 and 0.02