Question: An online poll conducted by Ipsos Reid on behalf of
An online poll conducted by Ipsos Reid on behalf of Rogers Wireless in May 2009 concluded that "two in ten (17%) of cellphone and smartphone users typically access the Internet on a daily basis from their phone."3 Although this online poll was not a probability sample, assume that it was. 1,403 Canadians were surveyed. Is there enough evidence, at the 4% level of significance, to conclude that more than 15% of all Canadian cell phone and smartphone users typically access the internet on a daily basis from their phone?
Answer to relevant QuestionsA retail electronics shop is thinking of mounting a sales push to get customers to buy the extended warranty available for their purchases. The sales manager believes that fewer than 10% of customers currently opt for the ...A financial services company conducted a survey of a random sample of its customers. One of the items on the survey was as follows: "The staff at my local branch can provide me with good advice on my financial affairs." ...A gasoline refinery has developed a new gasoline that, theoretically, reduces gas consumption per 100 kilometres driven (or, to use a non-metric phrase, provides improved gas mileage).The company wants to gather evidence to ...Suppose you have null and alternative hypotheses as follows: H0: p = 0.26 H1: p ≠ < 0.26 Assume that the sample size, at 200,is less than 5% of the population. The sample proportion is 0.30.Estimate the p-value for this ...A researcher wants to estimate the average grocery bill of households whose members shop at a particular supermarket to within $10, with 95% confidence. How big a sample size is necessary? A preliminary sample revealed a ...
Post your question