State the null and alternative hypotheses (using appropriate mathematical symbols for the population parameters) and identify which represents the claim. Then determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed.(a) A job recruiting office claims that the standard deviation of starting salaries for introductory-level software engineers is $5000.(b) A news report claims that the proportion of college freshmen in the Class of 2024 planning to pursue a degree in business is at least 15%

All parts of the question.

A mobile game currently has 38% of the market share. The CEO of the company producing the game recently authorized an advertising campaign with the goal of increasing the game's market share. A random sample of 1041 mobile gamers found that 409 gamers played the game at least once a day.  A  .Setup the null and alternative hypotheses to see if there is a significant change in the market share of the game. B. Determine if you can use a normal model to approximate the distribution of sample proportions. C. Find the critical value for a level of significance of 0.03. D. Find the standardized test statistic. E. State the conclusion of the hypothesis test.

Assuming that other factors are held constant, which approach would tend to increase the likelihood of rejecting the null hypothesis?​   a. ​Decrease the sample mean difference.   b. ​Increase the sample variance.   c. ​Increase the sample mean difference.   d. ​Decrease the sample size.

Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the standard deviation is 5. What is the probability of selecting a person with a score greater than Cody’s?

State the null and alternate hypothesis. Will you use a left tail, right tail or 2 tailed test? Identify the sampling distribution to be used: standard normal, Student’s t or chi squared. Find the value of the test statistic. Find the P-Value. Based on your answers, shall we reject or accept the null hypothesis? Write the conclusion in the context of the problem.

Takeout Food A magazine article reported that 14% of adults buy takeout food every day. A fast-food restaurant owner surveyed 180 customers and found that 31 said that they purchased takeout food every day. At a=0.01, is there evidence to believe the article's claim? Use the critical value method with tables. Part 1 of 5 (a) State the hypotheses and identify the claim. This hy is a two-tailed V test. Part (b th e critical vaiue, separate them with co Critic Part: 2 / 5 Part 3 of 5 (c) Compute the test value. Always round z score values to at least two decimal places. z=