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A botanist wishes to test the null hypothesis that the average diameter of the flowers of a particular plant is 9.6cm. He decides to take a random sample of size n=80 and accept the null hypottesis if the mean of the sample falls between 9.3 cm to 9.9cm: if the mean of this sample falls outside this interval, he will reject the null hypothesis. What decision will he make and will it be in error if
a) he gets a sample mean of 10.2 cm amd Mu=9.6cm:
b)he gets a sample mean of 10.2 cm and Mu=9.8cm:
c)he gets a sample mean of 9.2 cm and Mu=9.6cm:
d)he gets a sample mean of 9.2 cm and Mu=9.8cm?
if you upload an image please make sure it is clear and your writing is legible.a telemarketer makes 80 calls in a one
Construct a 95% confidence interval for the population mean, assuming a normal distribution?
Compute a 95% confidence interval for the population proportion of positive drug tests. Explain why is the normality assumption not a problem despite the very small value of p.
1. identify a commonly used graphical technique for portraying events and relationships among events.2. what does it
Find out best decision, by using following decision criteria.
A deck of cards contains 52 cards, 13 in each of four suits (hearts, diamonds, clubs and spades). Suppose you have been dealt five cards without replacement from a randomly shuffled deck of cards. Find the probability that al five cards are hearts..
Calculate a 95% Confidence Interval
Using the 0.05 level of significance, is there evidence that the population mean is above $190? What is your answer in (a) if s = $50 and the 0.10 level of significance is used?
How might variance and standard deviation be applied to a real-world business-related problem? Provide a specific application in which these measures are useful.
She surveys 100 randomly selected families and finds the mean income to be $96,321 with a standard deviation of $9555.With a0.05, is she correct?
Expireall Corporation is in finishing business. The following data took place during September: The standard cost card indicates that 2.0 feet are used in the production of each unit. The standard cost of each material is $4.50 per foot.
A ten year old survey found that the average income of sole proprietor CPA's was $74,914. To update this information, a new survey of 112 proprietor CPA's was taken and it showed a mean of $74,695.
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