For a study conducted by the research department of a pharmaceutical company, 295 randomly selected individuals...

For a study conducted by the research department of a pharmaceutical company, 295 randomly selected individuals were asked to report the amount of money they spend annually on prescription allergy relief medication. The sample mean was found to be $17.60 with a standard deviation of $5.70. A random sample of 235 individuals was selected independently of the first sample. These individuals reported their annual spending on non-prescription allergy relief medication. The mean of the second sample was found to be $18.40 with a standard deviation of $4.40 . As the sample sizes were quite large, it was assumed that the respective population standard deviations of the spending for prescription and non-prescription allergy relief medication could be estimated as the respective sample standard deviation values given above. Construct a 95% confidence interval for the difference between the mean spending on prescription allergy relief medication () and the mean spending on non-prescription allergy relief medication (). Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. What is the lower limit of the 95% confidence interval? What is the upper limit of the 95% confidence interval?

Solutions

Expert Solution

orchestra answered 1 year ago

Next > < Previous

Related Solutions

A study conducted by the research department of a pharmaceutical company claims that the annual spending...

A study conducted by the research department of a pharmaceutical company claims that the annual spending (per person) for prescription drugs for allergy relief, μ1 , is greater than or equal to the annual spending (per person) for non-prescription allergy relief medicine, μ2 . A health insurance company conducted an independent study and collected data from a random sample of 225 individuals for prescription allergy relief medicine. The sample mean is found to be 17.5 dollars/year, with a sample standard...

A study was conducted on a sample randomly selected from city A. The results are presented...

A study was conducted on a sample randomly selected from city A. The results are presented in the table. Based on the information in the table answer the below questions: Age groups Number of participants Proportion of female Relative frequency of participants 15 years or younger 10 0.4 16-25 years 25 0.6 26-30 years 10 1.0 31 years or older 2 1.0 Are the age groups mutually exclusive? Based on the number of participants, can you argue for or against...

In a recent survey conducted by Pew Research, it was found that 156 of 295 adult...

In a recent survey conducted by Pew Research, it was found that 156 of 295 adult Americans without a high school diploma were worried about having enough saved for retirement. Does the sample evidence suggest that a majority of adult Americans without a high school diploma are worried about having enough saved for retirement? Use a 0.05 level of significance. State the null and alternative hypothesis What type of hypothesis test is to be used? What distribution should be used...

For a new study conducted by a fitness magazine, 240 females were randomly selected. For each,...

For a new study conducted by a fitness magazine, 240 females were randomly selected. For each, the mean daily calorie consumption was calculated for a September-February period. A second sample of 230 females was chosen independently of the first. For each of them, the mean daily calorie consumption was calculated for a March-August period. During the September-February period, participants consumed a mean of 2385.3 calories daily with a standard deviation of 206 . During the March-August period, participants consumed a...

For a new study conducted by a fitness magazine,285 females were randomly selected. For each, the...

For a new study conducted by a fitness magazine,285 females were randomly selected. For each, the mean daily calorie consumption was calculated for a September-February period. A second sample of 275 females was chosen independently of the first. For each of them, the mean daily calorie consumption was calculated for a March-August period. During the September-February period, participants consumed a mean of 2383.5 calories daily with a standard deviation of 208. During the March-August period, participants consumed a mean of...

For a new study conducted by a fitness magazine, 270 females were randomly selected. For each,...

For a new study conducted by a fitness magazine, 270 females were randomly selected. For each, the mean daily calorie consumption was calculated for a September-February period. A second sample of 285 females was chosen independently of the first. For each of them, the mean daily calorie consumption was calculated for a March-August period. During the September-February period, participants consumed a mean of 2387.2 calories daily with a standard deviation of 216. During the March-August period, participants consumed a mean...

A researcher at a medical college conducted a study of 60 randomly selected male soccer players...

A researcher at a medical college conducted a study of 60 randomly selected male soccer players and concluded that frequently "heading" the ball in soccer lowers players' IQs. The soccer players were divided into two groups, based on whether they averaged 10 or more headers per game. Mean IQs were reported in the article, but the sample sizes and standard deviations were not given. Suppose that these values were as given in the accompanying table. n Sample Mean Sample sd...

For a new study conducted by a fitness magazine, 240 females were randomly selected. For each,...

For a new study conducted by a fitness magazine, 240 females were randomly selected. For each, the mean daily calorie consumption was calculated for a September-February period. A second sample of 210 females was chosen independently of the first. For each of them, the mean daily calorie consumption was calculated for a March-August period. During the September-February period, participants consumed a mean of 2385.5 calories daily with a standard deviation of 222 . During the March-August period, participants consumed a...

A study is conducted on 8,000 individuals free of diabetes and 8,000 individuals with diabetes. The...

A study is conducted on 8,000 individuals free of diabetes and 8,000 individuals with diabetes. The investigators are looking to determine if a newly marketed drug may prevent diabetes. Among patients with diabetes, 1,000 individuals received the new drug. Among patients without diabetes, 2,000 individuals received the drug. 4a. Construct a 2 by 2 table displaying the combination of diabetics/non-diabetics who are exposed/not exposed. 4b. Calculate an odds ratio and provide an interpretation 4c. Calculate the relative risk and provide...

The research department of an insurance company conducted a survey of the cause of automobile accidents...

The research department of an insurance company conducted a survey of the cause of automobile accidents in the last calendar year. A random sample of 200 policies written on single persons revealed that 60 had been in at least one accident. A similar survey of 300 policies written on married persons revealed that 75 had been in at least one accident. At the .05 level of significance, is there a significant difference in the proportion of the population of single...

Subjects