Q: I’m testing the claim that a population exceeds .62, the null hypothesis is H0, what is it?
A: H0 = Null Hypothesis H1 = Alternative Hypothesis
Q: A meteorologist is concerned about the number of tornadoes in her county. Using data from the past…
A: (a)Here, the claim is that true proportion of days with a tornado during peak season is greater than…
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A: It is given that Population mean, μ = 60000 Sample mean, x̄ = 65000 Standard error, SE = 130
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A: Hypothesis is an assumption that is being tested.
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A: GIVEN DATA, n=374x=45p^=xn=45374=0.1203claim:p≠0.18
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A: Given : A hypothesis test is conducted at the α = 0.05 significance level and the null hypothesis…
Q: Test the claim that the mean GPA of night students is larger than 2.1 at the 0.005 significance…
A: Solution:- Given: μ0=2.1,x¯=2.11,n=50,s=0.06,α=0.005 and d.f.=n-1=50-1=49 To find, (1) Hypothesis…
Q: b. Get Most Powerful Test (MPT) at a given significance level a. c. Analyze your MPT's power. [let n…
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Q: Only about 15% of all people can wiggle their ears. Is this percent different for millionaires? Of…
A: The complete solution of the question given in the image uploaded below. Thanks!
Q: significance level of α=0.02α=0.02. H0:p=0.59H0:p=0.59 H1:p<0.59H1:p<
A: The test is left tailed test. The sample proportion is:
Q: Which of the following is NOT true when we increase the significance level of a hypothesis test?…
A:
Q: You wish to test the following claim (Ha) at a significance level of a = 0.02. H.:P1 – P2 = 0 Ha:P1…
A: The test statistic for proportions difference is, Z=p^1-p^2P^(1-P^)(1n1+1n2)where p^1 and p^2=first…
Q: Only about 18% of all people can wiggle their ears. Is this percent different for millionaires? Of…
A: Given info: Only about 18% of all people can wiggle their ears. Of the 374 millionaires surveyed, 45…
Q: If a treatment is expected to decrease scores on a variable for which the mean is expected to be…
A: Given: μ=50 If a treatment is expected to decrease scores on a variable, then the appropriate…
Q: The P-value for a hypothesis test is shown. Use the P-value to decide whether to reject H0 when…
A: If p- Value < level of significance We reject the null hypothesis. If p-value >level of…
Q: A meteorologist is concerned about the number of tornadoes in her county. Using data from the past…
A: I solve this problem using Excel.
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A: It is given that the p-value is 0.009.
Q: If the p-value is greater than 0.5, then you have proven the null hypothesis is true. True or False
A: We have to find given statement is true or false..
Q: If a null hypothesis is rejected at the 0.05 level of significance, it must be rejected at the 0.01…
A: Statement: " If a null hypothesis is rejected at the 0.05 level of significance, it must be rejected…
Q: researcher is conducting an experiment to evaluate a treatment that is expected to decrease the…
A:
Q: Test the claim that the proportion of people who own cats is smaller than 30% at the 0.005…
A: Givenn=100p^=0.21p=0.3α=0.005
Q: Recall that a test is statistically significant at a particular significance level if the null…
A: Given that If a test is statistically significant at 5% level of significance. That is the null…
Q: Which of the following is true? A. a high R2 indicates that the model has a high goodness-of-fit. B.…
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Q: After the rule change between 2006 and 2007 that permitted teams to prepare their own footballs, new…
A: From the ginve data in the question 36 38 40 40 44 44 44 44 46 46 46 46 48 48 48 48 50 50 50 52 52…
Q: Using the z table (Table E), find the critical value (or values) for each of the following…
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Q: State your decision to the significance test in terms of the null hypothesis.According to a recent…
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A: Interpretation:The 95% confidence interval can be interpreted as follows:One can be 95% confident…
Q: e the given information to complete parts (a) and (b) below. Original claim: More than 54% of…
A: The hypothesis regarding the population proportion will be: H0:p=0.54H1: p > 0.54
Q: Test the claim that the proportion of people who own cats is significantly different than 80% at the…
A: Here, the claim is that the proportion of people who own cats is significantly different than…
Q: A researcher is testing a two-tailed null hypothesis at the p < .01 level with df = 45. What…
A:
Q: null hypothesis at the p < .01 level with df = 48. What critical value would she or he use? Justify…
A: Given that Degree of freedom =df =48 p<0.01
Q: Only about 12% of all people can wiggle their ears. Is this percent lower for millionaires? Of the…
A: The level of significance is 0.05.
Q: You wish to test the following claim (HaHa) at a significance level of α=0.005.…
A: The known values are, The null and alternative hypothesis is, The level of significance is,…
Q: publisher reports that 36% of their readers own a laptop. A marketing executive wants to test the…
A: Given n=320 P=0.36 Alpha=0.01
Q: Test the claim that the mean GPA of night students is larger than the mean GPA of day students at…
A:
Q: When the null hypothesis is true, the F test statistic is close to When the null hypothesis is…
A: F-statistics are the ratio of two variances that are approximately the same value when the null…
Q: Only about 10% of all people can wiggle their ears. Is this percent higher for millionaires? Of the…
A:
Q: You are conducting a study to see if the proportion of voters who prefer Candidate A is…
A: Given,n=80x=54p^=xnp^=5480=0.675α=0.01
Q: You set up a two-sided hypothesis test for a population mean u with a null hypothesis of Ho : µ =…
A: Given: α = 0.05 Null hypothesis: H0 : μ = 100 p-value = 0.12
Q: er per population for people 25 years age. 5 124 99 134 121 110 116 113 96 116 116 135 96 sample of…
A: From the data given There is no difference in rate of Hay fever 0"…
Q: State whether the standardized test statistic z indicates that you should reject the null…
A: The values of the standardized test statistic z are given.
Q: u wish to test the following claim (HaHa) at a significance level of α=0.10 Ho:p1=p2…
A: For the 1st population, Number of success in a sample, Sample size, For the 2nd population, Number…
Q: Only about 19% of all people can wiggle their ears. Is this percent different for millionaires? Of…
A: We have given that Population proportion p=0.19 Sample size n=392 82 could wiggle their ears X=82…
Q: Is there sufficient evidence at the 0.05 level of significance that the average repair time is less…
A: Let μ denotes the population mean repair time. The claim of the test is that the average repair time…
Q: Past studies have indicated that the percentage of smokers is estimated to be about 35%. Given the…
A: a) From the given information, the claim of the problem is the percentage of smokers has reduced.…
Q: Based on certain data, a null hypothesis is rejected atthe 0.05 level of significance. Would it also…
A: Concept of p-value: The p-value in hypothesis testing is the probability of obtaining a test…
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- You are conducting a study to see if the proportion of women over 40 who regularly have mammograms is significantly more than 0.77. You use a significance level of α=0.002α=0.002. H0:p=0.77H0:p=0.77 H1:p>0.77H1:p>0.77You obtain a sample of size n=324n=324 in which there are 256 successes.What is the test statistic for this sample? (Report answer accurate to three decimal places.)test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.)p-value = The p-value is... less than (or equal to) αα greater than αα This test statistic leads to a decision to... reject the null accept the null fail to reject the null As such, the final conclusion is that... There is sufficient evidence to warrant rejection of the claim that the proportion of women over 40 who regularly have mammograms is more than 0.77. There is not sufficient evidence to warrant rejection of the claim that the proportion of women over 40 who regularly have…In the past, the mean lifetime for a certain type of flashlight battery has been 9.5 hours. The manufacturer has introduced a change in the production method and wants to perform a significance test to determine whether the mean lifetime has increased as a result. The hypotheses are: null: μ = 9.5 hours alternative: u 9.5 hours Suppose that the results of a significance test result in a rejection of the null hypothesis. If we later find out that the true population running time was actually equal to 10.5, what error has been committed? Type I and Type II error Type II error no error Type I errorTest the claim that the proportion of people who own a pet is smaller than 50% at the 0.05 significance level. The null and alternative hypothesis would be: Но: р 3 0.5 Но:д > 0.5 Но:д 0.5 Ні:р 0.5 Hi:р + 0.5 The test is: left-tailed two-tailed right-tailed Based on a sample of 600 people, 288 owned a pet, the p-value is: |(to 4 decimals) Based on this we: Fail to reject the null hypothesis Reject the null hypothesis
- If the p-value is very large (say close to 1), then it is likely that we will reject the null hypothesis. True FalseYou recently completed an experiment concerning the effects of carbs on happiness. One group of 11 people are assigned a high carb diet, another group of 11 people are assigned a moderate-high carb diet, another group of 11 people are assigned a moderate-low carb diet, and a final group of 11 people are assigned a low carb diet. If I find that I fail to reject the null hypothesis, what might my next step be? Group of answer choices Change my analysis and alpha to make the finding significant and then run post-hoc tests. 1. Run multiple dependent measures t-tests to see if there are any significant differences between particular groups 2. Run multiple independent samples t-tests to see if there are any significant differences between particular groups 3. Change my hypothesis to see if I can find something significant with a different hypothesis for this study 4. Run home and binge-watch Bridgerton because there is nothing else that should be done statisticallyState the Result: A hypothesis test was conducted at the alpha = 0.01 level of significance. The test resulted in a p-value of 0.044.
- Prof. Johnson conducts a hypothesis test on whether the proportion of all UBC students who bike to school (denoted as p) equals 30%. Specifically, Prof.Johnson has H0:p=0.3 versus HA:p≠0.3. He obtains a P-value of 0.01. On the other hand, Prof. Smith would like to test if there is sufficient evidence to support that p is greater than 0.3 at the 10% significance level. Based on Prof. Johnson's result, will the null hypothesis of Prof. Smith's test be rejected? A. There is insufficient information to tell.B. Yes.C. No.Looking at youth depression scores from a general sample of random children in the US, we want to determine if our sample is significantly different than the national average of scores of children with depression in the US. The national average of scores on a measure of depression is 5 points. We have no reason to assume it will be higher or lower than the US national average. The sample: 11 9 12 3 3 4 13 1. What is the null and alternative hypotheses? Do not specify any directionality. 2. What did you discover (using 95% Cl)? Provide an interpretation.(e) If the researcher decides to test this hypothesis at the x = 0.05 level of significance, will the researcher reject the null hypothesis? Yes O No
- Suppose you want to test the claim that a population mean equals 40. (a) State the null hypothesis. H0: μ > 40 H0: μ < 40 H0: μ = 40 H0: μ ≠ 40 H0: μ ≥ 40 (b) State the alternate hypothesis if you have no information regarding how the population mean might differ from 40. H1: μ > 40 H1: μ < 40 H1: μ = 40 H1: μ ≠ 40 H1: μ ≥ 40 (c) State the alternative hypothesis if you believe (based on experience or past studies) that the population mean may exceed 40. H1: μ > 40 H1: μ < 40 H1: μ = 40 H1: μ ≠ 40 H1: μ ≥ 40You are conducting a study to see if the probability of catching the flu this year is significantly less than 0.22. You use a significance level of α=0.005α=0.005. H0:p=0.22H0:p=0.22 H1:p<0.22H1:p<0.22You obtain a sample of size n=430n=430 in which there are 77 successes.What is the p-value for this sample? (Report answer accurate to four decimal places.)p-value = The p-value is... less than (or equal to) αα greater than αα This p-value leads to a decision to... reject the null accept the null fail to reject the null As such, the final conclusion is that... There is sufficient evidence to warrant rejection of the claim that the probability of catching the flu this year is less than 0.22. There is not sufficient evidence to warrant rejection of the claim that the probability of catching the flu this year is less than 0.22. The sample data support the claim that the probability of catching the flu this year is less than 0.22. There is not sufficient sample…Questions A, B, and C. Please!