Answers:1.a) rXY = .461, t = 1.272, Do not reject H0: no evidence for a significant correlation between the two variables b) 43.66 1. Verbal ability consists of at least two components: verbal comprehension (e.g., reading ability) and verbal fluency (e.g.,writing ability). A researcher measures these two components in a sample of 8 seventh-grade children and obtains thefollowing scores:Comprehension Fluency57 74 42 48 75 62 76 694046383654425025a) Is there a significant correlation between the two variables (a ≤.05)?b) If another seventh-grader obtained a verbal comprehension score of 70, what would his or her predicted verbal fluencyscore be?

The given two components are verbal comprehension and verbal fluency.

Answered: 1. Verbal ability consists of at least…

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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Claim: The mean systolic blood pressure of all healthy adults is less than 122 mm Hg. Sample data: For 278 healthy adults, the mean systolic blood pressure level is 119.95 mm Hg and the standard deviation is 15.39 mm Hg. Complete parts (a) and (b). C a. Express the original claim in symbolic form. Let the parameter represent a value with respect to systolic blood pressure of a healthy adult. (Type an integer or a decimal. Do not round.)
You are doing a T-test and get a Standardized Test Statistic (STS) of T = 0.9, with d. f. = 23. Round answers to 4 decimals. Find the P-value for a: a. right tailed test : b. left tailed test : a. two tailed test : Submit Question 13 MacBook Air esc 00 F3 600 O00 F4 F1 F2 F5 %23 2 tab R. # 3
A1) - Calculate the mean speed [in mph] of 4 cars travelling at 46 mph and 4 cars travelling at 63 mph. A2) Calculate the root mean square speed [in mph] of 6 cars travelling at 43 mph and 7 cars travelling at 56 mph. Sidenote: for a1 I tried submitting the answer as 54.5 and it was wrong for a2 I tried submitting the answer as 50.42 and it was incorrect
Claim: The mean systolic blood pressure of all healthy adults is less than 125 mm Hg. Sample data: For 272 healthy adults, the mean systolic blood pressure level is 123.92 mm Hg and the standard deviation is 15.65 mm Hg. Complete parts (a) and (b). a. Express the original claim in symbolic form. Let the parameter represent a value with respect to systolic blood pressure of a healthy adult. ▼ (Type an integer or a decimal. Do not round.) b. Identify the null and alternative hypotheses. ▼ ▼ C Ho H₁: (Type integers or decimals. Do not round.)
Need the claim, hypothesis, crit value(s), rejection regions, d, Sd, t test, reject or fail to, and conclusion.
Claim: The mean systolic blood pressure of all healthy adults is less than 122 mm Hg. Sample data: For 278 healthy adults, the mean systolic blood pressure level is 119.95 mm Hg and the standard deviation is 15.39 mm Hg. Complete parts (a) and (b). a. Express the original claim in symbolic form. Let the parameter represent a value with respect to systolic blood pressure of a healthy adult. H < 122 (Type an integer or a decimal. Do not round.) b. Identify the null and alternative hypotheses. Ho: H₁: (Type integers or decimals. Do not round.)
State the conclusion based on the results of the test. Nex qeSuOn The mean of the pressure required to open a certain valve is known to be = 6.5psi. Due to changes in the manufacturing process, the quality-control manager feels that the average pressure has changed. The null hypothesis was rejected. Choose thee correct answer below. OA. There is not sufficient evidence that the mean of the pressure required to open a certain valve has changed. O B. The mean of the pressure has not changed. Oc. The mean of the pressure has changed. OD. There is sufficient ovidence that the mean of the pressure required to open a certain valve has changed. OE. There is sufficient evidence that the mean of the pressure required to open a certain valve has not changed. OF There is not suficient evidence that the mean of the pressure required to open a certain valve has not changed.
K A company is developing a new high performance wax for cross country ski racing. In order to justify the price marketing wants, the wax needs to be very fast. Specifically, the mean time to finish their standard test course should be less than 55 seconds for a former Olympic champion. To test it, the champion will ski the course 8 times. The champion's times (selected at random) are 54.9, 63.7, 48.1, 53.9, 49.3, 47.4, 53.7, and 44.9 seconds to complete the test course. Should they market the wax? Assume the assumptions and conditions for appropriate hypothesis testing are met for the sample. Use 0.05 as the P-value cutoff level. Choose the correct null and alternative hypotheses below. Ο A. Ho:μ = 55 HAH55 Calculate the test statistic. ... t= OB. Ho:μ>55 HA:μ = 55 OD. Ho:μ<55 HAH=55 (Round to three decimal places as needed.) Calculate the P-value. P-value= (Round to four decimal places as needed.) Choose the correct clusion below. A. No, do not market the wax as there is insufficient…
A sports fan conducted a test to investigate whether male high school athletes are equally divided among football, soccer, swimming, tennis, and basketball. A sample of male high school athletes was selected and the resulting value of the chi-square test statistic was 10.65. Which of the following represents the p-value? A P (x > 10.65) = 0.00 В P(x² > 10.65) = 0.03 P (x > 10.65) = 0.06 D P (x² > 10.65) = 0.94 E P(x? > 10.65) = 0.97
Here is part of a calculation in a spreadsheet working with population data of x. Which statement is incorrect? Q4. frequency,f 3 5 4 2 7 Total 10 23 ΣΤ= 10 & Σx = 23 & Σίx 49 E(x) = 4.9 The median of x is (4 + 7)/2. А. В. %3D C. D. H = 4.9 O A. A В. В С. С O D. D
Answer 8.144
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