A batch of cookies is sent out for sale if more than 95% pass a yum test. Rather than test every cookie in the batch, they only test sample n=250 from each batch. In batch #42, of the 250 cookie tests, 245 of them passed the yum test. Using this data, test the null hypothesis that H0: p=.95 vs Ha: p>.95 at the a=.1 level. What is the p-value of this test, and what is your conclusion?

Q: A researcher conducts a hypothesis test using a sample of n=20 with M =34 and s^2=36 from an unknown…

A: Here, the known values are n=20 with M =34 and s2=36.

Q: Based on information from a previous study, r1 = 38 people out of a random sample of n1 = 104 adult…

A: The parametric test contain the assumption of normally distribution. But the non parametric test is…

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A: Given that,possible chances (x)=40sample size(n)=50success rate ( p )= x/n = 0.8success…

Q: In a test of Ho:u data yielded the test statistic z = 2.17. Find the p-value for the test. = 100…

A: Here, the test statistic value is 2.17 and the test is two-tailed.

Q: An experiment compares two treatment conditions with a sample ofn = 20 in each treatment. If the…

A:

Q: In a test of Ho: µ = 100 against Ha: µ 100, a sample of size 80 produces z = 0.8 for the value of…

A: Given: z =0.8 The null and alternative hypothesis are: H​0​​: μ=100 H​a​​: μ≠100 It is a two tailed…

Q: In a test of H0: µ=150 against HA: µ<150, a sample of size 250 produces Z = -0.65 for the value…

A: The z statistic value is –0.65. Step-by-step procedure to obtain the p-value using standard normal…

Q: In a study whether there is a difference between the average heights (in inches) of adult females…

A: Given  n1=120, sample mean x̄1=62.7, s1=2.5, n2=150, sample mean x̄2=61.8, s2=2.62

Q: The data indicates that women in the tech industry (M = 7.26) rated intelligence as a more desirable…

A: A sample size is a part of the population chosen for a survey or experiment. Sample size…

Q: A two-sample t-test for a difference in means was conducted to investigate whether there is a…

A: Given: Test Statistic = 2.201 P-value = 0.027

Q: Perform the test of hypothesis indicated, at 0.10 level of significance, using the data from…

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Q: ng habits of adults in a certain region of the country are in the same proportion as the general…

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Q: In a previous year, 61% of females aged 15 and older lived alone. A sociologist tests whether this…

A: np(1-p)= 400×0.6×0.4=96>10  Hence, the sample size is under 5%op population size and consider as…

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: In a completely randomized experimental design, three brands of paper towels were tested for their…

A: Anova: Single Factor                   SUMMARY         Groups Count Sum Average Variance x 4…

Q: In a test of H0: µ=75 against HA: µ<75, a sample of size 450 produces Z = -1.19 for the value of…

A: The test statistic is given by –1.19.

Q: Based on information from a previous study, r1 = 30 people out of a random sample of n1 = 107 adult…

A: Here is given that r1 = 30    r2 = 46    n1 = 107   n2 = 107 we will find proportions of both…

Q: In a clinical trial, 27 out of 845 patients taking a prescription drug daily complained of flulike…

A:

Q: Based on information from a previous study, r1 = 38 people out of a random sample of n1 = 106 adult…

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Q: Under what circumstances can you use a z-test instead of a t-test to compare a sample against a…

A: t test and z-test are the statistical tests that are used to find if the value of the sample mean is…

Q: According to a certain government agency for a large country, the proportion of fatal traffic…

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Q: Based on information from a previous study, r1 = 39 people out of a random sample of n1 = 105 adult…

A: The test statistic for the difference of proportion is, Z=p1-q1P^(1-P^)1n1+1n2wherep1 and p2=sample…

Q: The test statistic of z= 1.19 is obtained when testing the claim that p> 0.3. a. Identify the…

A: a. Different null and alternative hypotheses can be defined as given below Two tailed test: Left…

Q: A test of hypothesis is conducted for a one population proportion test and the test is a two-tailed…

A: Te standard normal distribution is used to conduct the hypothesis test for population proportion. In…

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

A: We have  to find Given the test statistics .

Q: Two samples, each with n = 9 scores, produce an independent-measures t statistic of t = 2.00. If the…

A:

Q: You complete a hypothesis test using alpha = .05 and based on the evidence from the sample, your…

A: Researchers do a Hypothesis test to decide what is really happening withe the given data, there are…

Q: Consider the following: In general, when people diet they typically lose 10 lbs. (?σ = 2). A…

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Q: Public health regulators try to maintain a level of fluoride in the public drinking water of 0.8…

A:

Q: In the population of senior students at Shermer High School, the proportion who plan to attend…

A: From the provided information, Population proportion (p) = 0.64 Sample size (n) = 100 Sample…

Q: A sample is selected from a population with population mean = 50. After a treatment is administered…

A: μ=50 M = 55 s2 = 64 n = 36 α = 0.05

Q: In a test of H0:p=0.4 against Ha:p≠0.4, a sample of size 100 produces z=1.28 for the value of the…

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Q: If you have an experimental manipulation that you hypothesize will decrease scores, then for you to…

A: To reject the null hypothesis, the observed z score must be extreme than the critical z score.

Q: A researcher conducted a t-test for independent samples to evaluate the mean difference between two…

A:

Q: In a previous year, 61% of females aged 15 and older lived alone. A sociologist tests whether this…

A: According to our guidelines we can answer only first question and rest can be reposted.

Q: A researcher conducts an independent- measures research study and obtains t = 2.070 with df = 28.…

A: The given information is that the value of t-test statistic is 2.070 and degrees of freedom is 28.

Q: In a clinical trial, 19 out of 879 patients taking a prescription drug dally complained of flulike…

A: One proportion Z test is applicable

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: In each of Exercises, use the Wilcoxon signed-rank test to perform the required hypothesis test. How…

A: The null and the alternative hypotheses are,H0: µ≤37.2Ha: µ>37.2The test statistic is calculated…

Q: The test statistic of z = 0.54 is obtained when testing the claim that p > 0.5. Identify the…

A: Given that  Claim : p>0.50 Level of significance (α)=0.05 Test statistic (z) = 0.54

Q: The test statistic of z=1.79 is obtained when testing the claim that p≠0.576. a. Identify the…

A: From the provided information, The test statistic (z) = 1.79 Claim p ≠ 0.576

Q: In a test of H0: µ=10 against HA: µ<10, a sample of size 100 produces Z = -2.01 for the value of…

A: Given HypothesisH0: µ=10HA: µ<10Sample size n =100Z = -2.01The p-value corresponding to z = -2.01…

Q: A sample is selected from a population with population mean = 50 After a treatment is administered…

A: Provided information, n= 36 ,= 55 , S2 = 64 S= 8 ,  =50 Step 1 : We want to test the following null…

Q: Two different types of injection-molding machines are used to form plastic parts. A part is…

A:

Q: The test statistic of z = 0.54 is obtained when testing the claim that p > 0.5. Identify the…

A: GivenTest statistic(z)=0.54claim is that p>0.5

Q: A random sample of size 36 from a population with variance, o = 9, yields a sample mean of x = 17.…

A: We know that the α denotes the Type-1 error and β denotes the Type-2 error which is defined as the…

Q: n and the variance of a sample of size 16 from normal population are 32 and 8, respectively. For…

A: Hypothesis testing  Hypothesis testing is conducted for the parameters of the population like…

Q: The data in the following table resulted from an experiment that utilized a completely randomized…

A: Given data is :

Q: The test statistic of z = 0.85 is obtained when testing the claim that p > 0.2. Identify the…

A: State the hypotheses.   Identify the tail of the test.   The tail of the test is determined below…

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.