1. A coin has been tossed 1000 times, 470 times of which it landed heads up, and 530 times it landed tails up. Is this coin fair? Formulate and test the corresponding null and alternative hypotheses and interpret your result.

Express the null hypothesis and the alternative hypothesis in symbolic form.   An entomologist writes an article in a scientific journal which claims that fewer than 12 in ten thousand male fireflies are unable to produce light due to a genetic mutation.

-Find the correct null hypothesis and for each correct alternative hypothesis 5. You want to test the fairness of a single die, so you concentrate on the proportion of 1s that come up. Write down the null and alternative hypotheses.

Claim: A minority of adults would erase all of their personal information online if they could. A software firm survey of 554 randomly selected adults showed that 38% of them would erase all of their personal information online if they could. Complete parts (a) and (b) below. ... a. Express the original claim in symbolic form. Let the parameter represent the adults that would erase their personal information. (Type an integer or a decimal. Do not round.)

The average manufacturing work week in metropolitan Chattanooga was 40,1 hours last year. It is believed that the recession has led to a reduction in the average work week. To test the validity of this belief, the hypotheses are O* Họ 2 40.1 Hạ <40.1 ObHọ - 401 H * 40.1

A fair coin is flipped 80 times, and it turns up heads 30 times. You want to test the hypothesis that the coin does not turn up heads one-half of the time. Pick the correct null hypothesis.  i. H0 : p = 3/8     ii .H0 : p = 1/2    iii. H0 : ˆp = 3/8      iv. H0 : ˆp = 1/2