ision about the null hypothesis.

I need help understanding the null hypothesis and when to “reject” or “fail to reject” it. I got 5.77 in 3df and a critical value of 7.82.

Dentists A toothpaste company wants to declare in an ad that more than 80% of dentists recommend their toothpaste.   The company performs a hypothesis test at the α = 0.05 significance level to test their claim. The company samples 800 dentists.  Of these, 653 recommend their toothpaste. Let p represent the population proportion of dentists that recommend their toothpaste. b.Calculate the z or t statistic. (Do not use continuity correction.  Round final answer to 4 decimal places) Statistic: c.  Find the p-value. (Do not use continuity correction.  Round final answer to 4 decimal places) p-value:

You may need to use the appropriate echnology to answer this questiol Consider the following hypothesis test. Ha: Hd > 0 (a) The following data are from matched samples taken from two populations. Compute the difference value for each element. (Use Population 1 - Population 2.) Population Element 1 2 Difference 1 21 19 2 28 25 18 17 4 20 17 26 25 (b) Compute d. (c) Compute the standard deviation (d) Conduct a hypothesis test using a = 0.05. Calculate the test statistic. (Round your answer to three decimal places.) Calculate the p-value. (Round your answer to four decimal places.) p-value %3D

Base on the relationship between the obtained value and the critical value, what decision would you make about the null hypothesis? Reject the null, the critical value exceeds the obtained value Accept the null, the critical value exceeds the obtained value Reject the null, the obtained value exceeds the critical value Accept the null, the obtained value exceeds the critical value

A personal computer manufacturer is interested in comparing assembly times for two keyboard assembly processes. Assembly times can vary considerably from worker to worker, and the company decides to eliminate this effect by selecting a random sample of 12 workers and timing each worker on each assembly process. Half of the workers are chosen at random to use Process 1 first, and the rest use Process 2 first. For each worker and each process, the assembly time (in minutes) is recorded, as shown in the table below. Worker 1 2 3 4 5 6. 7 8. 9. 10 11 12 Process 1 85 63 46 85 83 70 64 51 48 69 67 52 Process 2 88 46 43 61 80 51 59 53 23 46 59 52 Difference - 3 17 3 24 19 5 -2 25 23 8 (Process 1 - Process 2) Send data to calculator Based on these data, can the company conclude, at the 0.05 level of significance, that the mean assembly times for the two processes differ? Answer this question by performing a hypothesis test regarding u, (which is with a letter "d" subscript), the population…

K During the 2015 season, the home team won 142 of the 263 National Football League games. Is this strong evidence of a home field advantage in professional football? Test an appropriate hypothesis and state your conclusion. Be sure the appropriate assumptions and conditions are satisfied before you proceed. Use α = 0.05. Determine the hypotheses for this test. (The proportion of home teams winning is denoted by p.) Ho: P = HA: P (Type 11 V V # cimals.) …... View an example Statorumah

P-value is -.055 You are asked to make a decision about whether to reject the null hypothesis that the population value of gamma equals 0 (i.e., that there is no ordinary association in the population between frequency of prayer and health). If alpha = 0.05 and you use a non-directional alternative hypothesis, which of the following is true?)    A. Since the p-value is larger than alpha, you do not reject the null hypothesis B. Since the p-value is less than alpha, you do not reject the null hypothesis  C. Since the p-value is larger than alpha, you reject the null hypothesis. D. Since the p-value is less than alpha, you reject the null hypothesis

Movie Theater Attendance:  The data shown are the movie admissions, in thousands, of people attending movie theaters over two different time periods. At α = 0.05, is there a difference in the means for the movie attendance for these time periods? Use the traditional method of hypothesis testing unless otherwise specified. State the hypotheses and identify the claim. Find the critical value. Compute the test value. Make the decision. Summarize the results. Return of the Jedi (1983) Harry Potter 5 (2007) 6207 10579 4412 4395 6424 6031 8126 6607 8423 5357 7456 2431 4171 2140 3829 1969 3756 1778 5074 2384 6833 2866 5189 2337

A sample mean, sample standard deviation, and sample size are given. Use the one-mean t-test to perform the required hypothesis test about the mean, μ, of the population from which the sample was drawn. Use the critical-value approach. Sample mean = 7.1                 s = 2.3             n = 18              α = 0.01 H0: µ = 10 H1: µ < 10 The decision is to the null hypothesis. (Enter R if you reject and enter F if you fail to reject)