1. During the COVID-19 Pandemic, while school-aged children were attending classes online, 70% of parents feltoverwhelmed. It is believed this percent has decreased. A simple random sample of 500 parents was surveyed 335said they felt overwhelmed. Is this enough evidence to conclude that the percentage of parents who feeloverwhelmed has decreased from the Pandemic/Stay at Home Era?a. State the Ho and the Hab. Calculate the test statistic and the p-valuec. Reject or fail to reject Hod. State the full conclusion in plain English.

Sample size n =500 Favorable cases x =335 Sample proportion p^=x/n =335/500 =0.67

Answered: 1. During the COVID-19 Pandemic, while…

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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Consider a sample data with x=25 and s=2. Compute a chebyshev’s interval for which at least 89% of the data will lie?
A case-control study is conducted to assess the relationship between heavy alcohol use during the first trimester of pregnancy and miscarriage. Fifty women who suffered miscarriage are enrolled along with 50 who delivered full term. Each participant’s use of alcohol during pregnancy is ascertained. Heavy drinking is defined as 4 or more drinks on one occasion. The data are shown below. Miscarriage Delivered Full Term Heavy Alcohol Use 14 4 No Heavy Alcohol Use 36 46 a. Compute the odds of miscarriage in women with heavy alcohol use in pregnancy. b. Compute the odds of miscarriage in women with no heavy alcohol use in pregnancy. c. Compute is the odds ratio for miscarriage as a function of heavy alcohol use.
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In one study of smokers who tried to quit smoking with nicotine path therapy,38 were smoking one year after the treatment, and 32 were not smoking one year after the treatment. Use a 0.10 significance level to test the claim that among smokers who try to quit with nicotine patch therapy, the majority are smoking a year after the treatment. d. Calculate the test statistic z. Which of these options is closest to z? A. negative 2.02 B. 0.72 C. negative 0.25 D. 2.59 e. Calculate the P-value. Which of these options is closest to the P-value? A. 0.2358 B. 0.2164 C. 0.3359 D. 0.2271 f. State the technical conclusion A. Reject Upper H 0 B. Do not reject Upper H 0 g. State the final conclusion A. There is sufficient evidence to warrant rejection of the claim. B. There is not sufficient evidence to warrant rejection of the claim.…
A publisher reports that 69 % of their readers own a particular make of car. A marketing executive wants to test the claim that the percentage is actually under the reported percentage. A random sample of 200 found that 60% of the readers owned a particular make of car. Is there sufficient evidence at the 0.10 level to support the executive's claim? Step 5 of 7: Identify the value of the level of significance.

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