Question

1) A study of 150 apple trees showed that the average number of apples per tree...

1) A study of 150 apple trees showed that the average number of apples per tree was 2000. The standard deviation of the population is 100. Which of the following is the 80% confidence interval for the mean number of apples for all trees?

a) (1986.6, 2013.4) b) (1988.5, 2011.5) c) (1989.5, 2010.5) d) (1993.1, 2006.9)

2) If a population has a standard deviation of 16, what is the minimum number of samples that need to be averaged in order to be 95% confident that the average of the means is within 4 of the true mean?

a) 62 b)16 c)8 d)122

3) A recent study of 750 internet users in Europe found that 35% of internet users were women. What is the 95% confidence interval of the true proportion of women in Europe who use the internet? a) b)  c) d)

4) If p^ is equal to 0.82, then q^   is equal to

a) 0.35 b)0.18 c)0.50 d)0.82

5) For the conjecture "The average rent of an apartment is more than or equal to $950 per month", the alternative hypothesis is:

a) The average rent of an apartment is less than $950 per month b)The average rent of an apartment is greater than $950 per month c) We do not reject the hypothesis that the average rent of an apartment is more than $950 per month   d) We reject the hypothesis that the average rent of an apartment is more than $950 per month

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A study of peach trees showed that the average number of peaches per tree was 2000....
A study of peach trees showed that the average number of peaches per tree was 2000. The standard deviation of the population is 200. A scientist wishes to find the 99% confidence interval for the mean number of peaches per tree. How many trees does she need to sample to be accurate within 16 peaches per tree?
An apple orchard has an average yield of 32 bushels of apples per tree if tree...
An apple orchard has an average yield of 32 bushels of apples per tree if tree density is 26 trees per acre. For each unit increase in tree density, the yield decreases by 2 bushels per tree. How many trees per acre should be planted to maximize yield? Hint – first convince yourself that the function for yield is given by  where  is the number of trees per acre above or below 26. Write your final answer in a sentence like this...
Among a random sample of 37 smokers, the average number of cigarettes smoked per day per...
Among a random sample of 37 smokers, the average number of cigarettes smoked per day per person is 22.0 with a standard deviation of 10.8. Perform a test of significance to determine if it is likely that on average smokers will smoke more than 17 cigarettes a day. a) H_0: mu (=, >, <, or not equal to)  17 H_a: mu (=, >, <, or not equal to)  17 b) Is the CLT for means valid? (yes/no) c) Calculate the test statistic  (use...
A study carried out by Nielsen/ Net Ratings in the last August 2001 indicated that the...
A study carried out by Nielsen/ Net Ratings in the last August 2001 indicated that the average number of Internet sessions at home per month was 34. In the following September, they conducted a study and recorded the number of Internet sessions at home for a random sample of 100 Internet users. The average number of Internet sessions was 32 with standard deviation equal to 4.5. Compute a statistical test to determine if the number of Internet sessions decreased from...
The number of trees per acre in the Lassen National Forest in California follows a Poisson...
The number of trees per acre in the Lassen National Forest in California follows a Poisson distribution with a rate of 100 trees per acre. Let the random variable X count the number of trees per randomly selected acre of the Lassen National Forest A) State the distribution of the randomly variable defined above B) Compute and interpret P(X=107) C) Compute the probability that in a randomly selected acre of the Lassen National Forest there are at most 90 trees...
Do students study less than 150 minutes (2.5 hours), on average, each week? A survey of...
Do students study less than 150 minutes (2.5 hours), on average, each week? A survey of 51 randomly selected students finds that on average students study 138 minutes per night with a standard deviation of 32 minutes. A hypothesis test based on this data produces a test statistic of -2.68 and a p-value of 0.005. What are the appropriate decision and conclusion at the 5% significance level? Select one or more: Reject the null hypothesis. Do not reject the null...
A study carried out by Nielsen/ Net Ratings in the last August 2001 indicated that the...
A study carried out by Nielsen/ Net Ratings in the last August 2001 indicated that the average number of Internet sessions at home per month was 34. In the following September, they conducted a study and recorded the number of Internet sessions at home for a random sample of 100 Internet users. The average number of Internet sessions was 32 with standard deviation equal to 4.5. Compute a statistical test to determine if the number of Internet sessions decreased from...
In a study or 200 adult female​ (sample 1) and 250 adult male​ (sample 2) internet​...
In a study or 200 adult female​ (sample 1) and 250 adult male​ (sample 2) internet​ users, 60 of the females and 95 of the males said they plan to shop online at least once during the next month. At alphaα ​= 0.10, test the claim that there is a difference in the proportion of females internet users who plan to shop online and the proportion of male of male internet users who plan to shop online. Hypotheses What are...
A gaming company would like to test the hypothesis that the average age of someone who...
A gaming company would like to test the hypothesis that the average age of someone who uses gaming console A is different from the average age of someone who uses gaming console B. A random sample of 36 gaming console A users had an average age of 34.2 years while a random sample of 30 gaming console B users had an average age of 32.7 years. Assume that the population standard deviation for the age of gaming console A and...
A gaming company would like to test the hypothesis that the average age of someone who...
A gaming company would like to test the hypothesis that the average age of someone who uses gaming console A is different from the average age of someone who uses gaming console B. A random sample of 36 gaming console A users had an average age of 34.2 years while a random sample of 30 gaming console B users had an average age of 32.7 years. Assume that the population standard deviation for the age of gaming console A and...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT