A verification study was performed and a standard with a known value of 10 was performed on a new analyzer. The new analyzer produced a value of 13. What would the accuracy be for this standard?
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A verification study was performed and a standard with a known value of 10 was performed on a new analyzer. The new analyzer produced a value of 13. What would the accuracy be for this standard?
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- A random sample of 12 song lengths (in minutes) on a playlist found: = 278.3, s = 19. Build a 80% CI for the population mean length of a song on the playlist. Round all intermediate calculations to two decimals, then construct the Cl and enter like this: (min,max). Note: if you use a built-in Cl command on a calculator/computer, you might get marked wrong due to rounding. Use the formulas given in the text/notes. a. Since n < 30, We use a Z-interval O We use s, not o O It is important that song lengths be normally distributed O We use a T-interval b. The Cl is: Submit QuestionHigh cholesterol is one of the major risk factors for heart disease. A total cholesterol reading above 190 mg/dL is considered high.A physician is concerned that a patient may be at risk for high cholesterol. In order to accurately measure the patient's average cholesterol level, the physician instructs the patient to come into the physician's office once a week for 12 weeks for a blood lipid screening. The results of the 12 measurements are listed below. 189 186 199 197 190 186 185 200 200 200 185 190 Use the critical value method to test the hypothesis that the patient's cholesterol level is greater than 190 mg/dL, using a significance level of 10%. Assume that the distribution of all cholesterol measurements from this patient is approximately normally distributed. Determine the critical value(s) for this hypothesis test. Round the solution(s) to four decimal places. If more than one critical value exists, enter the solutions using a comma-separated list.Determine the test…FOLLOW THE INSTRUCTIONS AND ANSWER COMPLETELY AND TYPEWRITTEN FOR UPVOTE. NOT FOLLOWING MY INSTRUCTIONS GETS DOWNVOTE
- A student at Tolland High School wondered if boys or girls at her school traveled a greater distance to college. The student randomly selected 50 boys and 50 girls and found the distance each boy and girl travels to college. What type of interval should the student use to compute the difference in the average distances between how far boys and girls from Tolland High School travel to college?researchers wanted to determine if carpeted rooms contained more baterica than uncapted rooms. to determine the amount of bacterica in a room reseachers pumpled the air from the room over a petri dish at the rate of 1 cubic foot per minute for eight carpeted rooms and eight uncaprted rooms. colonies of baterica were alled to form in 16 petri dishes. the results shown below are the baterica counta per cubic foot mean standard deviation sample size capeted room 11.2 2.6774 8 uncapted room 9.7875 3.21 8 you want ti test using sigificance level of 0.01 whether the mean bactiria count is high for carpeted rooms than for uncapteed rooms. test whether the mean bacteria count is high for carpeted rooms thatn uncarpeted rooms. show all steps using the p value method. what is Ho and H1? what is the test statsic and p value? what conclusion can be made?A wildlife study is designed to find the mean weight of salmon caught by an Alaskan fishing company. It is known that ?=2.15σ=2.15 pounds. How large a sample should be taken to be 93% confident that the sample mean is within 0.20 pounds of the true mean weight of the salmon caught?
- A group of 320 male students from the local high school have a mean mass of 70.41 kg. Records of similar students countrywide show a mean mass of 70.0 kg. A researcher wishes to determine whether the local students differ from the national group. what would be the research problem?A music fan claims that R&B songs and Rap songs differ in terms of their positivity. The individual collected two independent random samples from the population of all songs on Spotify. Fifteen R&B songs and another fifteen Rap songs were collected and their Valence was recorded. Remember, the variable Valence is measured on a 0 to 1 scale. Songs with high valence sound more positive (e.g. happy, cheerful, euphoric), while songs with low valence sound more negative (e.g. sad, depressed, angry). We will subtract (R&B – Rap) and use the 10% significance level. Assume the Central Limit Theorem conditions hold. The data set is called RBRapSample31. Please import the data set into Rguroo or find it in our group. Define the population parameter in context and symbols in one sentence. State the hypotheses you would use to test the claim that a difference exists in the mean Valence between R&B and Rap songs using correct notation.A researcher evaluates a new cholesterol medication by measuring cholesterol levels for a group of patients before they begin taking the medication and after they have been taking the medication for 8 weeks. A second researcher measures quality of life for a group of 40-year-old men who have been married for at least 5 years and a group of 40-year-old men who are still single. Explain why the first researcher is probably not concerned about the validity of the measurement, whereas the second researcher probably is. (Hint: What variable is each researcher measuring and how will it be measured?)
