# [HELP] i need help with them

1. Dec 23, 2011

### filmi1

[HELP] i need help with them plz

20. A biologist is studying a new hybrid tomato. It is known that the seeds have a probability of 0.8 of germinating. The
biologist plants 400 seeds. What is the expected number of seeds that will germinate? (Assume a binomial distribution.)
a. 200 b. 240 c. 320 d. 480 e. none of these

21 - 25. A company claims that their chocolate chip cookies contain an average of 15 chips per cookie. A study of
100 cookies is done, and the average chip count of the sample is 14.78 with a standard deviation of 1.2.
21. What is the null hypothesis?
a. Ho: m § 15 b. Ho: m = 15 c. Ho: m ¥ 15

22. What kind of critical region is involved in this situation?
a. left-tailed b. right-tailed c. two-tailed

23. What is the standardized test statistic in this hypothesis test?
a. -1.65 b. -1.83 c. -1.96 d. -2.14 e. none of these

24. What is the p-value of this test statistic?
a. 0.0437 b. 0.0672 c. 0.0289 d. 0.0185 e. none of these

25. Based on a significance level of a = 0.05, what would the conclusion be?
a. fail to reject the null hypothesis b. reject the null hypothesis

to 20.question
I'm stuck with number 20..i think its C but im not too sure
and mostly i'm stuck on the null hypothesis..i'm confused because i can't tell what im supposed to pick

Last edited by a moderator: Dec 23, 2011
2. Dec 23, 2011

### filmi1

Re: [HELP] i need help with them plz

this is what i thinkkkk they are: 21.a 22.b 23.b 24.b 25.a
but help me ..i don't want to get them wrong? if you know that they are something else then plz tell me so i know what i did wrong

3. Dec 23, 2011

### micromass

Staff Emeritus
Re: [HELP] i need help with them plz

4. Dec 23, 2011

### Staff: Mentor

Re: [HELP] i need help with them plz

Some of the characters you typed are unreadable in my browser.
Is § supposed to be < ?
Is ¥ supposed to be >?

5. Dec 23, 2011

### filmi1

Re: [HELP] i need help with them plz

mark it's done for these .. thanks from u i appreciate

the topic can erare or close