1. A research firm claims that 60% of families have two or more televisions, 30% have only one, and the rest do not own

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1 A Research Firm Claims That 60 Of Families Have Two Or More Televisions 30 Have Only One And The Rest Do Not Own 1 (72.85 KiB) Viewed 32 times

1. A research firm claims that 60% of families have two or more televisions, 30% have only one, and the rest do not own a television. Do the following data, obtained from a survey of 43 randomly selected consumers, support these claims? Conduct a test at the 0.05 level of significance. Two or more 20 One Zero 15 8 2. A retail store claims that it has twice as many customers in the winter than in any other season. Assuming that the numbers of customers in the other seasons are equivalent, do the following data support the store's claim? Use a =0.01. Spring Summer 1,950 1.800 Fall Winter 1.700 3,500 3. In a study to determine whether there is a relationship between employee's standard of dress and their professional advancement, a random sample of 180 employees yielded the results shown below. What conclusion should be reached at the 1% significance level? Well dressed Poorly dressed Slow advancement Avg. advancement Fast advancement 28 69 22 15 33 13 4. Doctors are interested in comparing different treatments for preventing the recurrence of urinary tract infections in women. One hundred and fifty women with a UTI were sampled and then randomly assigned to three treatment groups. Do the following data indicate that there is a relationship between treatment type and the recurrence of UTIS a = 0.05? Cranberry juice Lactobacillus drink Control Recurring UTI No new UTI 8 42 20 30 18 32