state the null and alternative hypotheses  b. calculate the test statistic  c. what are the df? what is the critical value

Q: If the value of the test statistic is 0.064 and the critical value is ± 1.645, what will be your…

A:

Q: Find the critical values for (a) A left-tailed test with a=0.15 (b) A two-tailed test with a= 0.03

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Q: A random sample of 54 students from Cabrillo College are selected from a normal population with mu…

A: We have to find correct statement for given. Data

Q: Find the t-critical value (?(?/2)) for a 70% confidence interval with a sample size of 15.

A: Given that,  n=15,c=0.70 The level of significance is, α=1-c  =1-0.70  =0.30 The degree of freedom…

Q: (a) state the null and alternative hypotheses, (b) compute the test statistic, (c) determine the…

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Q: In order to test the following hypotheses at an a level of significance Ho:HS 800 H: u > 800 the…

A: Given hypothesis is, H0:μ≤800Ha:μ>800 Here, the alternative hypothesis is greater than case. That…

Q: The local swim team is considering offering a new semi-private class aimed at entry-level swimmers,…

A: Solution: From the given information, the claim is that the population mean is less than 15.

Q: Find the critical value zα/2 that corresponds to the confidence level 95​%.

A: From the provided information, Confidence level = 95%

Q: Find the critical value z(a/2) that corresponds to the confidence level 91%

A: Find the critical value z(a/2) that corresponds to the confidence level 91%

Q: If the p-value is greater than alpha, we will. reject the null hypothesis and accept the alternative…

A: If the P-value is greater than alpha, we do not have sufficient evidence to reject the null…

Q: As a researcher for the EPA, you have been asked to determine if the air quality in the United…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: According to a food website, the mean consumption of popcorn annually by Americans is 58 quarts. T…

A: Given Information:  Mean consumption (u) = 58 quarts

Q: For a two-tailed test at 86.12% confidence, if is known the critical value is

A: It is given that, the confidence level is 86.12.

Q: (e) Assuming that the four potential outliers of 0, 0, 8, and 20 are not recording errors, repeat…

A: Note: As per guidelines we will solve the first question only, please repost other questions for…

Q: If you want to show that the use of vitamin C reduces the mean time to recover from a common cold,…

A: Given that For no vitamin, sample size n1 = 32, sample mean = 6.3, and sample SD = 2.7 For vitamin…

Q: Suppose the average reading speed of 15 randomly selected elementary school students is 25, and the…

A: Given that, X1 bar = 25 , n1= 15 X2 bar= 31, n2= 15  Calculated t= 5.72  And the result is…

Q: In a study of the accuracy of fast food drive-through orders, one restaurant had 39 orders that were…

A: The random variable X follows binomial distribution. X ~B (n p). The number of successes is 39. The…

Q: cite three instances that will prove that experimental research is more accurate, and reliable.

A: Prooving That experimental research is more accurate, and reliable

Q: . Is there sufficient evidence at the 0.05 level of significance that the average years of…

A: To test whether there is sufficient evidence at 0.05 level of significance that the average years of…

Q: What is the critical value of a two-sided paired t test with ? = 0.05 and ? = 25?

A: Given that, Sample size n=25 Level of significance α=0.05

Q: Is this a valid experimental design?

A: Here student want to check fertilizer affect the plant growth

Q: For a two-sided confidence interval with 15 observations, Ox known, and a = 0.05 the (critical)…

A: Since the population SD is known the we will use the critical value of Z.

Q: If an original claim for some aspect of a population is u=3.00, the test statistics is t= +2.05 and…

A: The test statistic value is 2.05.

Q: A consumer group is investigating a producer of diet meals to examine if its prepackaged meals…

A: The random variable advertised amount of protein follows normal distribution. We have to test…

Q: find the critical value t of alpha over 2 used to construct  the confidence interval for a mean from…

A: It is given that n is 5 and level of significance is 0.02.

Q: A random sample of 7,000 had a proportion of interest of 0.535. Is there sufficient evidence, at the…

A: Solution: State the hypotheses Null hypothesis: That is, the true population proportion is 0.521.…

Q: Find the critical value z_α/2 that corresponds to the given confidence level. 96%

A: From the provided information, Confidence level = 96% Level of significance (α) = 1 – 0.96 = 0.04

Q: Use the critical value method to test the null hypothesis Ho: B₁=0 versus H₁ : B₁ #0. Use the a=0.05…

A: Given: n=25se=149.08∑x-x¯2=69.27b1=31.32

Q: Suppose we have a sample mean of 12, an estimated standard error of the mean of 2.5, and a…

A: Given x¯=12SEx¯=2.5tα2=2.306 The confidence interval for population mean is…

Q: Find the critical value zα/2 that corresponds to the given confidence level. 89%

A: Given: Confidence level = 0.89 So,  α=1-confidence level=1-0.89=0.11

Q: Imagine that your null hypothesis is σ2 = 10 and your alternative hypothesis is σ2 > 10. What is…

A: It is given that the test is right-tailed. Level of significance is 0.05. Degrees of freedom is 12–1…

Q: Suppose we have the following random samples: Male Female sample size 50 60 sample mean weight (kg)…

A:

Q: Suppose that you run a Regression Model and the Regression Coefficient for X has an associated…

A: regression coefficient for X is β here confidence level = 99% so significance level = 1%

Q: Find the critical value t, for the confidence level c= 0.90 and sample size n=27.

A: The degrees of freedom is, Df=n-1     =27-1    =26

Q: Find the critical value zα/2 needed to construct a(n) 98.3% confidence interval.

A: Here, we need to construct a 98.3% confidence interval. It means, level of significance in the…

Q: Formulate the null and alternative hypothesis and identify the type of test. Tge manufacturer if a…

A: Given: μ= average nicotine content=2.5

Q: It is expected that a treatment will reduce scores on a variable. If α = .05, what is the critical t…

A: According to the provided information, α = .05 n = 15 df = n-1 = 15-1 = 14

Q: Find the critical value t, for the confidence level c = 0.90 and sample size n= 10.

A: From the provided information, Sample size (n) = 10 Degree of freedom = n – 1 = 10 – 1 = 9…

Q: A company with a fleet of 160 cars found that the emissions systems of 9 out of the 25 they tested…

A: Given: Sample size, n is 25 The number of cars that fail to meet guidelines (x) is, 9 The proportion…

Q: While continuing to keep abreast of local trends in education, a school administrator read an…

A: Consider p is true proportion of high school students who study on a regular basis for this district…

Q: Make 1 real-life problem with a solution in any of the following topics; 1. Preforming hypothesis…

A: Testing of hypothesis is a rule which, when the sample values have been obtained, leads to a…

Q: The manufacturer of a new antidepressant claims that, among all people with depression who use the…

A: The random variable is people who find relief from depression. The population proportion is 65%. The…

Q: Find the critical value Zα/2 that corresponds to the given confidence level 82%

A: The confidence level is 82%. Therefore, α =0.18.

Q: Find the critical value zα/2 that corresponds to the confidence level 90​%.     QUESTION** zα/2…

A: Here we need to find the z value corresponding to the 90% confidence interval.

Q: Access the significsnce of each of the variables in the attached table. For age, write out all of…

A:

Q: If a treatment is expected to increase scores among a population with u= 20, then the alternative…

A: HERE CLAIM IS MEAN WILL BE INCREASED TO IT IS GREATER THAN 20  CLAIM IS REPRESNTED IN ALTERNATIVE…

Q: Find the critical value zα/2 needed to construct a(n) 99.2% confidence interval.

A:

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.