Although not as popular as Facebook (Meta), Instagram has 500 million daily users and is also popular with advertisers. One key metric is how much time people spend per day on the platform. In 2020, Instagram users spent an average of 43 minutes per day on the platform. The marketing department of one advertiser took a survey of 72 Instagram users in 2022 and found they spent an average of 53 minutes per day on the platform with a standard error of 6.8715. (a) Which hypotheses should be used to test if the average amount of time people spend on the platform has increased since 2020? H0: Ha: (b) The p-value = 0.0750. The advertiser will only increase their spending if there is sufficient evidence the average number of minutes per day has increased. What should they do, for ? = 0.05? ; their spending. (c) Suppose the average number of minutes spent per day really has increased, but they conclude it has stayed the same. Which type of error would this be, if any? Type I error Type II error No error was made
Although not as popular as Facebook (Meta), Instagram has 500 million daily users and is also popular with advertisers. One key metric is how much time people spend per day on the platform. In 2020, Instagram users spent an average of 43 minutes per day on the platform. The marketing department of one advertiser took a survey of 72 Instagram users in 2022 and found they spent an average of 53 minutes per day on the platform with a standard error of 6.8715.
(a) Which hypotheses should be used to test if the average amount of time people spend on the platform has increased since 2020?
H0:
Ha:
(b) The p-value = 0.0750. The advertiser will only increase their spending if there is sufficient evidence the average number of minutes per day has increased. What should they do, for ? = 0.05?
; their spending.
(c) Suppose the average number of minutes spent per day really has increased, but they conclude it has stayed the same. Which type of error would this be, if any?
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