Elisabeth conducted an experiment where she examined the number of tourists who visited one place in the north. She counted the number each day for two months last year and wanted to find out if there was a difference in the average number of tourists in those two months. Elizabeth calculated a 95% confidence interval for the difference between the two averages as: −8.21 <μ1 - μ2 <−2.12. She then performed an appropriate hypothesis test to see if there was a difference in the averages and used α = 0.05.   Which of the following statements is true?   The 1st p-value of the test is lower than 0.05. The p-value of the test is higher than 0.05. The probability that the null hypothesis is true is 0.05. None of the above statements is correct given the information provided.

Q: A magazine provided results from a poll of 1000 adults who were asked to identify their favorite…

A: Given level of confidence = 0.90 So, level of significance (α) = 1 - level of confidence

Q: You wish to test the following claim (HaHa) at a significance level of α=0.001α=0.001.…

A: Given information: The hypotheses are given below: H0: μ=74.2Ha: μ&gt;74.2 The sample of size is…

Q: ou wish to test the following claim (HaHa) at a significance level of α=0.02α=0.02.…

A: As you do not know the standard deviation, we will use a t-test. Given: n=89 M=X=75.7 SD=s= 16.4 The…

Q: A news article that you read stated that 58% of voters prefer the Democratic candidate. You think…

A: Solution: Given data: p= .58 x= 150 n =30 Level of significance = 0.05 To Test the claim:   58% of…

Q: 7. For the preceding problem you should find that there are significant differences among the three…

A:

Q: Suppose you carry out a significance test of H0: μ = 8 versus Ha: μ > 8 based on sample size n = 25…

A: Given that µ = 8 n = 25 df = n-1 = 25-1= 24

Q: Data from the Motor Vehicle Department indicate that 80% of all licensed drivers are older than age…

A: (A). Propose the suitable analysis: Denote the proportion of licensed drivers who are older than 25…

Q: You wish to test the following claim (HaHa) at a significance level of α=0.05α=0.05.…

A:

Q: ou wish to test the following claim (HaHa) at a significance level of α=0.001α=0.001.…

A: As the population standard deviation is not known, we will use a t-test. The t-test statistic can be…

Q: A survey of 500 randomly selected students was taken and 200 responded that they favor candidate Z…

A: The confidence interval given is (-0.3090, -0.1767)This interval represents the range within which…

Q: 9% of all Americans suffer from sleep apnea. A researcher suspects that a higher percentage of those…

A: 1)

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A:

Q: 54% of students entering four-year colleges receive a degree within six years. Is this percent…

A: n=299x=138Population proportion(P)=0.54and

Q: Consider the following null and alternative hypotheses: Ho:u = 60 versus H1: µ > 60 Suppose you…

A:

Q: Dr. Romanoff reported the following in a journal: “F (5, 106) = 10.09, p = .04.”  Should Dr.…

A: It is given that p- value is 0.04 and the level of significance is 0.05.

Q: A store manager claims that 60% of shoppers who enter her store make a purchase. To investigate this…

A: From the provided information, Sample size (n) = 40 Sample proportion (p̂) = 0.40

Q: In a test of H0: p = .43 versus Ha: p ≠ .43, a sample of size 1500 leads to a p-value of 0.087.…

A: Here from the given hypothesis test and the p value we need to arrive at the correct conclusion from…

Q: You wish to test the following claim (HaHa) at a significance level of α=0.10α=0.10.…

A:

Q: What is the test statistic for this sample? (Report answer accurate to three decimal places.) test…

A: A normally distributed population is given, n=119M=70.8SD=6.8α=0.001 Hypothesis to be tested is…

Q: A suggestion is made that the proportion of people who have food allergies and/or sensitivities is…

A:

Q: You wish to test the following claim (HaHa) at a significance level of α=0.001α=0.001.…

A:

Q: University officials hope that changes they have made have improved the retention rate. Last year, a…

A:

Q: You wish to test the following claim (HaHa) at a significance level of α=0.002α=0.002.…

A: Given , Sample size = n = 13 Sample mean = x¯ = 82.3 Standard deviation = s = 9.1 Hypothesis : H0 :…

Q: Dr. Stevenson reported the following in a journal: “F (4, 106) = 10.09, p = .04.”  Should Dr.…

A:

Q: The manufacturer claims that your new car gets 35 mpg on the highway. You suspect that the mpg is a…

A: One sample t-test is used to compare the significance difference between sample mean and population…

Q: The manufacturer claims that your new car gets 31 mpg on the highway. You suspect that the mpg is…

A: For the given data Perform t test for single mean

Q: The manufacturer claims that your new car gets 26 mpg on the highway. You suspect that the mpg is…

A: Given data: Claim: The mpg is more for your car. Significance level= 0.10

Q: Suzette does an experiment where she collects date from 5 women and obtains the scores: 4,4,5,2 and…

A: We want to test the hypothesis by using t test.

Q: You wish to test the following claim (HaHa) at a significance level of α=0.001α=0.001.…

A: Here, the sample size n is 12.

Q: You wish to test the following claim (HaHa) at a significance level of α=0.02.       Ho:μ=88.1…

A: Given, Sample size = 74 Sample mean = 81.2 Sample standard deviation = 16.9   Set up the null and…

Q: If a treatment is expected to decrease scores on a variable for which the mean is expecte

A: From the given information, If a treatment is expected to decrease scores on a variable. The mean is…

Q: 15% of all Americans suffer from sleep apnea. A researcher suspects that a lower percentage of those…

A: Hey, since there are multiple subparts posted, we will answer the first three subparts. If you want…

Q: Under what circumstances is a t statistic used instead of a z-score for a hypothesis test?

A: As per our honor code we will only answer first question. 1)  There are two cases when we use t…

Q: mpany etballs has the motto, balls are ready to play. it is important to the company that the…

A:

Q: You conduct a statistical study in order to test whether a new training program has led to any…

A: Given, You conduct a statistical study in order to test whether a new training program has led to…

Q: The recommended daily dietary allowance for zinc among males older than age 50 years is 15 mg/day.…

A: Test statistic: Given information: n=117x¯=12.2s=6.60μ=15 Therefore,   z=x¯-μsn  =12.2-156.60117…

Q: A study was carried out to evaluate the safety of motorcycle helmets. 40 randomly selected helmets…

A: Solution:-To determine the confidence with which the study can claim that the proportion of all…

Q: Justine is an analyst for a sleep study center. She believes that the average adult in a certain…

A:

Q: The recommended daily dietary allowance for zinc among males older than age 50 years is 15 mg/day.…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.