(a)Suppose a market analyst wishes to see whether consumers have any preference among fiveflavors of a new fruit soda. A sample of 1000 people provided the following data:Apple320Strawberry280Test at 10% significance level whether customers show no preference for flavours.Orange160Lime140Grape100

Given data: Apple Strawberry Orange Lime Grape Total 320 280 160 140 100 1000 Required: To…

Answered: (a) Suppose a market analyst wishes to…

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.4: Collecting Data

Problem 2E

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What is meant by the sample space of an experiment?
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Quinn, a market analyst at Chips 4U vending machine company, wants to determine the best allocation of snacks throughout schools in a school district where the company recently won a contract to install snack machines. In particular, Quinn wants to determine whether there is a relationship between grade level and snack preference. A random sample of 130 students is surveyed, and their school level and preferred snack are given in the table. SNACK granola bar peanuts pretzels chocolate bar TOTAL ELEMENTARY 32 10 17 20 79 Expected: HIGH SCHOOL 15 7 20 9 51 Expected: TOTAL 47 17 37 29 130 Complete the contingency table by entering the expected values (round to 2 decimal places). Then conduct an appropriate hypothesis test at alpha=0.02 . Determine the null and alternative hypotheses. �0: Grade level and student snack preferences both follow a uniform distribution.��: Grade level and student snack preferences follow some other distribution.…
An ice-cream manufacturer wishes to determine whether there is a relationship between the gender of a teenager and their preferred flavor of ice cream. A survey of 200 teenagers produced the following results: Gender strawberry vanilla chocolate total Female 25 18 59 102 Male 32 29 37 98 Total 57 47 96 200 perform an appropriate test at a 5% level of significance to determine whether there is a relationship between the gender of teenagers and ice-cream flavor preferences. 2.) the financial manager of a national warehouse chain has found from previous experience that 45% of clients pay by credit card, 35% pay on account, while the reminder pay using cash. He wishes to know if this is still the case. A random sample of 1000 sales receipts from the last month produced the following results: Creditcard Account Cash Total No. Of receipts 500 315 185 1000 using a 1% significance level, test whether the payment method pattern has changed.
When a person states at the outset of an experiment that a higher average score will be received by a group receiving some kind of treatment when it is compared to the mean of a group that did not receive the treatment, the need for a _________________ is apparent. a. one-tailed test b. two-tailed test c. an independent groups test d. a matched groups test
A researcher wants to see if four different strategies to combat work fatigue are independent of the gender of the person using them. She draws a sample of 200 office workers, half of them women and half men, and obtains data on which strategy the participants use to combat fatigue at work. The four strategies are: Consumption of caffeine, taking a short “power” nap, exercise, and consumption of sugar. Is the preference for a particular method of combating drowsiness independent of gender? what statistical test should be used and why?
A market-research group specializes in providing assessments of the prospects of sites for new children’s toy stores in shopping centers. The group assesses prospects as good, fair, or poor. The records of assessments made by this group were examined, and it was found that for all stores that had annual sales over $1,000,000, the assessments were good for 70%, fair for 20%, and poor for 10%. For all stores that turned out to be unsuccessful, the assessments were good for 20%, fair for 30%, and poor for 50%. It is known that 60% of new clothing stores are successful and 40% are unsuccessful.a. For a randomly chosen store, what is the probability that prospects will be assessed as good?b. If prospects for a store are assessed as good, what is the probability that it will be successful?c. Are the events “prospects assessed as good” and “store is successful” statistically independent?d. Suppose that five stores are chosen at random. What is the probability that at least one of them will be…
A manufacturer is considering purchasing parts from three different suppliers. The parts received from the suppliers are classified as having a minor defect, having a major defect, or being good. Test results from samples of parts received from each of the three suppliers are shown below. Note that any test with these data is no longer a test of proportions for the three supplier populations because the categorical response variable has three outcomes: minor defect, major defect, and good.

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