Big fish: A sample of 150 flounder of a certain species have sample mean weight 23.5 grams. Scientists want to perform a hypothesis test to determine howstrong the evidence is that the mean weight differs from 22 grams. State the appropriate null and alternate hypotheses.The null hypothesis is H:H (Choose one) ▼The alternate hypothesis is H :p(Choose one) v

The random variable weight follows normal distribution. We have to write the null and alternative…

Answered: Big fish: A sample of 150 flounder of a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Summary statistics are given for independent simple random samples from two populations. Assuming population distributions are normal and equal population variances, conduct the required hypothesis test. Perform a right-tailed hypothesis test using a significance level of alpha= 0.05
Consider the hypothesis test below. Ho : P1 – P2 S 0 На : Рі — Р2 > 0 The following results are for independent samples taken from the two populations. Sample 1 Sample 2 Пі 3D 100 n2 300 P1 = 0.29 P2 = 0.16 Use pooled estimator of p. a. What is the p-value (to 4 decimals)? Use Table 1 from Appendix B. b. With a = 0.05, what is your hypothesis testing conclusion? Conclude the difference between the proportions is greater than 0
If you use a 0.05 level of significance in a two-tail hypothesis test, what decision will you make if ZSTAT=−1.52? Determine the decision rule.
A random sample of students attending a large university has been selected. Is there a statistically significant difference between Liberal Arts majors and other students in the mean number of books (other than those required by course work) read per year? Use α = .05 and the five-step model to conduct the hypothesis test. Write a sentence or two interpreting your results. Liberal Arts X1 = 16.2 s1 =2.3 N1 =236 Other Students X2 = 13.7 s2 =9.0 N2 =321
52
Cadmium, a heavy metal, is toxic to animals. Mushrooms, however, are able to absorb and accumulate cadmium at high concentrations. Some governments have a safety limit for cadmium in dry vegetables at 1.9 parts per million (ppm). A hypothesis test is to be performed to decide whether the mean cadmium level in a certain mushroom is less than the government's recommended limit. Complete parts (a) through (c) below. a. Determine the null hypothesis. HoiH ppm (Type an integer or a decimal. Do not round.)
Match the hypothesis to the situation. Hypothesis: 1. Ho: p1=p2 2. Ho: p= .73 3. Ho: = 0 4. Ho: 11 = ₂ 5. Ho: =.73 Two sample mean, independent samples Two sample mean, dependent samples One sample mean One sample proportion Two sample proportion o [Choose | [Choose ] Hypothesis 3 None of the hypothesis Hypothesis 4 Hypothesis 2 Hypothesis 5 Hypothesis 1 € A ► n 3
part d dropdown: at least .55 or less than .55 did not provide or provided should or should not
Suppose that you want to perform a hypothesis test for a population mean. Assume that the population standard deviation is unknown and that the sample size is relatively small. In each exercise, we have given the distribution shape of the variable under consideration. Decide whether you would use the t-test, the Wilcoxon signed-rank test, or neither. Explain your answers. Symmetric bimodal
Although the samples are actually related, an investigator ignores this fact in the statistical analysis and uses a t test for two independent samples. How will this mistake affect the probability of a type II error?
Observations from The null hypothesis is Ho: H1 = H, and the alternative hypothesis is as specified. The provided data are from a simple random paired sample from the two populations under consideration. Use the paired t-test to perform the required hypothesis test at the 10% significance level. Pair Population 1 Population 2 24 20 Hai Hy> H2 2 9 10 20 19 E Click the icon to view the t-table. 4. 13 8 5 8 14 14 7 10 15 8 22 28 Find the test statistic. Use population 1- population 2 as the difference. t=| (Round to three decimal places as needed.)
We want to conduct a hypothesis test of the claim that the population mean time it takes drivers to react following the application of brakes by the driver in front of them is less than 2.2 seconds. So, we choose a random sample of reaction time measurements. The sample has a mean of 2.1 seconds and a standard deviation of 0.4 seconds. For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round your answers to two decimal places. (a) The sample has size l18, and it is from a normally distributed population with an unknown standard deviation. t = O It is unclear which test statistic to use. (b) The sample has size 15, and it is from a normally distributed population with a known standard deviation of 0.45. O z O It is unclear which test statistic to use.

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