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Angela Jones

Angela J.

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Paul A. verified

Numerade educator

The manufacturers of Ben & Jerry’s Ice Cream would like to check the quality of their batches of Cherry Garcia, their most popular ice cream flavor. Since they have recently been receiving complaints from customers claiming that there aren’t enough cherries in their pints of Cherry Garcia, the company would like to evaluate whether their recent batches contain fewer cherries than their known average 27 cherries. Below are the numbers of cherries the company has counted in 9 pints they have manufactured from their most recent batch. Test this hypothesis using an alpha level of .01. Please show me how to find the critical value and obtained statistic.

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Katy Gimbel verified

Numerade educator

I toss an unfair coin 12 times. This coin is ( 70 % ) likely to show up heads. Calculate the probability of the following. Answer the following questions: 11 heads 3 or more heads 7 heads 9 tails 8 or less heads

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Juan Nicolás verified

Numerade educator

A hockey team is convinced that the coin used to determine the order of play is weighted for tails. The team captain steals this special coin and flips it 19 times to evaluate the hypothesis that the coin is weighted for tails, and it shows up tails 11 times. Test this hypothesis (use alpha=.01). 1. What is the appropirate test? I think this is a z test am I correct? 2. Are these the correct null and alternative hypotheses? H0: p = 0.5 Ha: P > 0.5 3. Find the critical value(s). I don't know how to find this can you please show me. 4. Calculate the obtained statistics. I do not know how to find this can you please show me how? 5. Make a decision: (can you explain to me which one of these it would be and why?) Reject the null. Retain the alternative. Retain the null. Reject the alternative 6. What does your decision mean? Please explain what it means. A hockey team is convinced that the coin used to determine the order of play is weighted. The team captain steals this special coin and flips it 19 times to evaluate the hypothesis that the coin is weighted, and it shows up heads 12 times. Test this hypothesis (use alpha=.05).

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Juan Nicolás verified

Numerade educator

4 2 what is the standard deviation? 7 1 7 what is the standard deviation? 8 15 12

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Diwakar Mandilwar verified

Numerade educator

Are there any clues in the word problems that tell me what I need to do to solve it? If it flat out says what is the standard deviation, I can do that. I can do all the calculations I just don't know when I am suppose to use them . How do I what to do when? Are there clues that let me know for example this is a z score problem, or a Pearson's r problem? Thanks!

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Sam Low verified

Numerade educator

( egin{aligned} r &=frac{Sigma X Y-frac{(Sigma X)(Sigma Y)}{N}}{sqrt{left[Sigma X^{2}-frac{(Sigma X)^{2}}{N} ight]left[Sigma Y^{2}-frac{(Sigma Y)^{2}}{N} ight]}} \ &=frac{106-frac{21(22)}{5}}{sqrt{left[111-frac{(21)^{2}}{5} ight]left[112-frac{(22)^{2}}{5} ight]}} \ &=frac{13.6}{18.616}=0.731=0.73 end{aligned} )

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