Assuming you have Rejected the Null Hypothesis using a 90% Confidence Interval what would happen if you made one change in your analysis – switching to a 95% Confidence Interval? The Null Hypothesis would still be rejected The Null Hypothesis would not be rejected The Null Hypothesis might be rejected or it might not Changing the Confidence Interval would not change the conclusion to Reject the Null

Q: The weights of college football players are normally distributed with a mean of 200 pounds and a…

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Q: Define why a confidence interval makes clear that one should not accept the null hypothesis

A: Despite the size of the sample, it is not possible for an individual to conclude that the null…

Q: When 95% Confidence Intervals between means are compared, which of the following allows the null…

A: Each hypothesis test consist of two hypothesis statements, they are null hypothesis and alternate…

Q: The null hypothesis for a particular experiment is that the mean test score is 20. If the 99%…

A: Solution: From the given information, the null hypothesis for a particular experiment is that the…

Q: ference between two proportions. Find the sample size needed for a margin of ror of 0.2 if you do…

A: Given For 95% confidence interval, z value=1.96 Margin of Error =0.2

Q: If your supervisor decides that they want to be 95% confident in the results of a survey were the…

A: Solving the second part only.

Q: Variety magazine recently ask a random sample of readers if Disney Plus was "as good as" Netflix.…

A: The 90% confidence interval is [0.4575, 0.5225]

Q: Suppose we want to conduct a hypothesis test at the 5% significance level of whether room rates of…

A: Given that  Population mean = 350 95% confidence interval =( 310 , 345 )

Q: If the 90% confidence interval does not include the value stated in the null hypothesis at the 10%…

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Q: What is the definition of "confounding effects"? O When you have multiple factors in a study and you…

A: A term confounding effects is given and the objective is to get to the right definition of it by…

Q: Based on a study of 380 dorm residents, the 95% confidence interval for average hours slept per…

A: The 95% confidence interval for average hours slept per weeknight is from 7.2 to 7.8.

Q: You want to know about the difference in the percentage of men who get sick when exposed to H1N1 and…

A: Given data: For men: n1 = 150      x1 = 20 For Women: n2 = 200       x2 = 15 Confidence level = 95%…

Q: "Trydint" bubble-gum company claims that 4 out of 10 people prefer their gum to "Eklypse". Test…

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Q: what z value would make you reject the null hypothesis  u=52 at a 90% confidence level when the…

A: The alternative hypothesis is µ<52.

Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A: Number of Canadian adults in 2005= 75 Number of Canadian adults in 2009 = 120   significance level =…

Q: People love living in California for many reasons, but traffic isn’t one of them. Based on a random…

A: For the given study, let x be the random variable representing the travel time to work for people…

Q: (True or False)

A: The answer is False.

Q: If the test is done at 95% confidence, the null hypothesis should

A: HER GIVEN, sample mean = 12.75 $  n= 100 standard deviation = $2 here population standard deviation…

Q: What can we do to make a confidence interval narrower without changing the confidence level?

A: Confidence interval:  A range of values such that the population parameter can expected to contain…

Q: The first day of baseball comes in late March, ending in October with the World Series. Does fan…

A: given that,sample one,  n1 =1001, p1= x1/n1=0.45sample two,  n2 =1001, p2= x2/n2=0.51

Q: A random poll of 800 middle school students found that 9% are ESL (English as a Second Language)…

A: A random poll of 800 middle school students found that 9% are ESL (English as a Second Language)…

Q: Your medical professor asks you to collect data from a lab samples to find out the percentage of…

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Q: We wish to give a 99% confidence interval for the fraction of fruit flies which possess a certain…

A: According to the given information in this question We need to calculate 99% confidence interval of…

Q: A random sample of 500 males included 215 that approved of the performance of a President.  A random…

A: Solution-: Given:  n1=500,n2=500,x1=215,x2=185,α=0.05 We want to calculate  (a) p1^, and q1^, p2^,…

Q: We wish to give a 90% confidence interval for the fraction of fruit flies which possesses a certain…

A:

Q: Regardless of your previous answers, let's say you make a 99% confidence interval and the interval…

A: Given information- We have given a 99% confidence interval- Lower limit = 0.14 Upper limit = 0.26…

Q: Poll X predicts that a presidential candidate will receive 47​% of the​ vote, while Poll Y predicts…

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Q: An agricultural researcher plants 50 plots with a new variety of potatoes. A 90% confidence interval…

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Q: Two different simple random samples are drawn from two different populations. The first sample…

A: Given: Sample size of first is n1=20. Number of people have same attribute is x1=9. Estimated sample…

Q: If 25 falls inside the confidence interval, then you would fail to reject the null hypothesis and…

A: If 25 falls inside the confidence interval, then you would fail to reject the null hypothesis and…

Q: Your medical professor asks you to collect data from lab samples to find out the percentage of these…

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Q: You are interested in constructing a 99% confidence interval for the proportion of all caterpllal…

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Q: If n=260 and p' (p-prime) = 0.84, construct a 99% confidence interval. Give your answers to three…

A: Given: n =260 p' =0.84 we need 99% confidence interval

Q: A random sample of n1n1 = 228 people who live in a city were selected and 85 identified as a…

A: Given n1=228 n2=101 X1=85 X1=54

Q: A 95% confidence interval for the mean can be interpreted to which of the following? A None of the…

A: In this case, we need to find the correct statement for the given question.

Q: You want to estimate the proportion of park visitors that bring food to the park. If you took an SRS…

A: Given that sample size is n= 100 And x= 43 We know that, proportion, p= x/n p= 43/100 = 0.43…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: We have given that the random sample of size n=490 and favourable cases X=353. The sample proportion…

Q: Last year, the average math SAT score for students at one school was 475. New teaching methods were…

A: According to the question, To determine if there is statistically significant evidence that the new…

Q: probability of a Type I error?

A: Here given , confidence interval changes to  90% to 99%

Q: If the confidence interval for the difference between two treatment means does not contain , then we…

A: If the confidence interval for the difference between the treatment means does not contain the value…