A hotel manager believe that the average cost of a hotel room in Muscat is more than R.O70. To test this, a researcher selects a sample of 35 hotel rooms in Muscat and finds that the average cost is RO 71. The standard deviation of the population is R.O 3.6. At α =0.01 [level of significance (LOS)], is there any evidence to conclude that the average cost is more than 70?
Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 262.2…
A: The mean is 262.2 and the standard deviation is 61.4.
Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 257.5…
A: The z-score for a variable X, with assumption that, X~N(?, ?²) is Defined that, Z~N(0,1), which is…
Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 263.9…
A: a) The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the…
Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 263.1…
A: μ = 263.1σ = 66.9Normal distributionempirical rule:68-95-99.7% data fall withikn1σ-2σ-3σ of μ…
Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 255.3…
A: Given : mean, u = 255.3 standard deviation , σ = 61.2
Q: A manufacturer claims that the calling range (in feet) of its 900-MHz cordless telephone is greater…
A: From the provided information,
Q: The blood platelet counts ofa group of women have a bell-shaped distribution with a mean of 253.1…
A:
Q: statistics student randomly selected 45 packets of sugar and weighed the contents of each packet,…
A: Given data: Mean = 3.5 g Sample mean = 3.586 g Standard deviation = 0.195 g Sample size = 45…
Q: It is reported that the average American eats out at a restaurant 5.9 times per week. A random…
A: We have given that, Population mean (u) = 5.9, population standard deviation (o) = 1.7, sample size…
Q: Suppose Abby tracks her travel time to work for 60 days and determines that her mean travel time, in…
A: The independent variable is Abby tracks her travel time to work for 60 days. It is measured by days.…
Q: A health professional obtains records for 35 patients who have undergone a certain surgical…
A: We have given, The sample size: n=35 The sample mean: x¯=3.17 days The sample standard deviation:…
Q: A biotechnology compuny produced alb doses of somutopin,induding 1 Which were defective. Quality…
A:
Q: A psychologist reports that the average length of R.E.M. sleep in his test subjects was 10 minutes.…
A: Hypothesis Testing: Hypothesis is a procedure by which we can tests an assumption regarding a…
Q: f7.22. on time
A: Solution
Q: is there enough evidence to support the administrator's claim
A: Given that Sample size(n)= 76 Sample mean (x¯) = 283 Population standard deviation(σ) = 31 Level of…
Q: a. Approximately % of women in this group have platelet counts within 2 standard deviations of the…
A:
Q: standard deviation was estimated to be 11.2 µg m-³. a. Determine the 95% confidence interval for the…
A: xbar = 41.5 s = 11.2 n= 30
Q: The desired percentage of SiO2 in a certain type of aluminous cement is 5.5. To test whether the…
A: The test statistic formula is, z=x¯-μσn The sample size is 16 with sample mean 5.25, population…
Q: A random sample of 81 eighth grade students' scores on a national mathematics assessment test has a…
A:
Q: Assume the resting heart rates for a sample of individuals are normally distributed with a mean of…
A: I have used the Empirical rule
Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 263.4…
A:
Q: On average, Americans have lived in 4 places by the time they are 18 years old. Is this average more…
A:
Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 247.3…
A:
Q: Suppose there are two different vaccines for Covid, Vaccine X and Vaccine Y. An interesting question…
A: Note: According to Bartleby guidelines we can solve maximum of three subparts in a question and rest…
Q: DIood platlelet countsS of a group of women nave a bell-shaped distribution with a mean of 247.ð and…
A: Let X be the blood platelet of a group of women. X ~ N(μ, σ) Given mean, μ = 247.8 Standard…
Q: (a). The null and alternative hypotheses are Но: 3D 21.7 Ha:µ > 21.7 Ho:µ = 20.3 Но: %| На: д < 20.3…
A: The claim is that the new drug will significantly reduce the average recovery time for a particular…
Q: A state school administrator claims that the standard deviations of U.S. history assessment test…
A: a) Hypotheses: Null hypothesis: H0: s1=s2The standard deviations of U.S. history assessment test…
Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 257.9…
A: Solution: Let X be the blood platelet counts of a group of women. From the given information, X…
Q: A random sample of 76 eighth grade students' scores on a national mathematics assessment test has a…
A: Given data is appropriate for testing of hypothesis . to test z-test for single mean . Because it is…
Q: A one-sample test of H0: μ = 125 against Ha: μ > 125 is carried out based on sample data from a…
A: The population standard deviation is 15.
Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 245.4…
A:
Q: The CDC is concerned that teenagers are being pushed into too many out-of-school activities. Their…
A: The level of significance is 0.01.
Q: Hawaiians are known to have an active lifestyle, enjoying the fresh air and natural beauty the…
A: State the appropriate hypothesis:Denote the population mean life expectancy of the US population…
Q: A researcher claims that the average number of calories in a serving of ice cream is 70 with a…
A: Suppose μ is the population average number of calories in a serving of ice cream.
A hotel manager believe that the average cost of a hotel room in Muscat is more than R.O70. To test this, a researcher selects a sample of 35 hotel rooms in Muscat and finds that the average cost is RO 71. The standard deviation of the population is R.O 3.6. At α =0.01 [level of significance (LOS)], is there any evidence to conclude that the average cost is more than 70?
![](/static/compass_v2/shared-icons/check-mark.png)
Step by step
Solved in 2 steps with 2 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
- Sony would like to test the hypothesis that the average age of a PlayStation user is different from the average age of an Xbox user. A random sample of 32 PlayStation users had an average age of 33.7 years while a random sample of 36 Xbox users had an average age of 35.6 years. Assume that the population standard deviation for the age of PlayStation and Xbox users is 3.7 and 3.5 years, respectively. Sony would like to set α = 0.05. The p-value for this hypothesis test would beThe blood platelet counts of a group of women have a bell-shaped distribution with a mean of 251.5 and a standard deviation of 69.1. (All units are 1000 cells/uL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 3 standard deviations of the mean, or between 44.2 and 458.8? b. What is the approximate percentage of women with platelet counts between 113.3 and 389.7? a. Approximately% of women in this group have platelet counts within 3 standard deviations of the mean, or between 44.2 and 458.8. (Type an integer or a decimal. Do not round.) b. Approximately % of women in this group have platelet counts between 113.3 and 389.7. (Type an integer or a decimal. Do not round.)An electrical engineer wishes to compare the mean lifetimes of two types of transistors in an application involving high-temperature performance. A sample of 60 transistors of type A were tested and were found to have a mean lifetime of 1827 hours and a standard deviation of 174 hours. A sample of 180 transistors of type B were tested and were found to have a mean lifetime of 1658 hours and a standard deviation of 231 hours. Let ux represent the population mean for transistors of type A and µy represent the population mean for transistors of type B. Find a 95% confidence interval for the difference uy – µy . Round the answers to three decimal places. The 95% confidence interval is
- A person read that the average number of hours an adult sleeps on Friday night to Saturday morning was 6.9 hours. The researcher feels that college students sleep more than 6.9 hours on average. The researcher randomly selected 13 students and found that on average they slept 7.4 hours. The standard deviation of the sample is 1.2 hours. At =α0.10 , is there enough evidence to say that college students sleep more than 6.9 hours on average? Assume that the population is approximately normally distributed. Use the P -value method and tables. Part: 0 / 5 0 of 5 Parts Complete Part 1 of 5 (a) State the hypotheses and identify the claim. This hypothesis test is a _____-tailed test. (b) Compute the test value. Always round t score values to three decimal places. (c) Select the correct interval for the P -value. 0.05 < P-value <0.10 0.01 < P-value <0.025…A data set of lumber estimates(dollars) has a mean of 5 and a standard deviation of 4.739, calculate the z-score of 15.321542. Z-Score = [three decimal places]A researcher claims that the average life span of mice can be extended when the calories in their diet are reduced by approximately 40% from the time they are weaned. The restricted diets are enriched to normal levels by vitamins and protein. Suppose that a sample of 10 mice is fed a normal diet and has anaverage life span of 32.1 months with a standard deviation of 3.2 months, while a sample of 15 mice is fed the restricted diet and has an average life span of 37.6 months with a standard deviation of 2.8 months. Assume the distributions of life spans for the regular and restricted diets are approximately normal withequal variance.(a) State the appropriate hypotheses to test the researcher’s claim.(b) Conduct the test at the 0.05 level of significance. What do you conclude?
- The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 260.4 and a standard deviation of 60.2. (All units are 1000 cells/uL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 3 standard deviations of the mean, or between 79.8 and 441.0? b. What is the approximate percentage of women with platelet counts between 140.0 and 380.8? ..I. a. Approximately % of women in this group have platelet counts within 3 standard deviations of the mean, or between 79.8 and 441.0. (Type an integer or a decimal. Do not round.)A health professional obtains records for 33 patients who have undergone a certain surgical procedure and finds the average length of stay is 3.23 days with a standard deviation of 1.58 days. Using α=0.10 is there evidence to suggest the actual average length of stay for this surgical procedure is 3 days? The correct conclusion is that we Select an answer: (can, maybe can, cannot) conclude that the average length of stay of Select an answer: (all, sampled, randomly selected) surgeries of this type Select an answer: (is less than, is is different from, is more than) Select an answer: (3.23, 0.85, 3) days.What level of concern do you have for the validity of your results? Moderate - the original data is not normally distributed which is an assumptions violation Low - our sample size is near 30, so while that's likely sufficient for X¯ to be approximately normally distributed, seeing that the original data isn't extremely skewed would make us feel more comfortable Extreme - we…The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 255.1 and a standard deviation of 62.2. (All units are 1000 cells/uL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 3 standard deviations of the mean, or between 68.5 and 441.7? b. What is the approximate percentage of women with platelet counts between 192.9 and 317.3? a. Approximately % of women in this group have platelet counts within 3 standard deviations of the mean, or between 68.5 and 441.7. (Type an integer or a decimal. Do not round.)
- Suppose there are two different vaccines for Covid, Vaccine X and Vaccine Y. An interesting question is which vaccine has a higher 6-month antibody effectiveness quotient (6AEQ). To examine this we randomly select 78 recipients of vaccine X and 93 recipients on vaccine Y. The vaccine X recipients had a mean 6AEQ of x = 151. The vaccine Y recipients had a mean 6AEQ of y = 148. It is recognized that the true standard deviation of 6AEQ for vaccine X recipients is 0x = 8.7 while it is recognized that the true standard deviation of 6AEQ for vaccine Y recipients is dy = 11.5. The true (unknown) mean 6AEQ for vaccine X recipients is μx, while the true (unknown) mean 6AEQ for vaccine Y recipients is y. 6AEQ measurements are known to be a normally distributed. In summary: Type Sample Size Sample Mean Standard Deviation Vaccine X 78 Vaccine Y 93 151 148 8.7 11.5 a) Calculate the variance of the random variable X which is the mean of the 6AEQ measurements of the 78 vaccine X recipients.…Suppose there are two different vaccines for Covid, Vaccine X and Vaccine Y. An interesting question is which vaccine has a higher 6-month antibody effectiveness quotient (6AEQ). To examine this we randomly select 78 recipients of vaccine X and 93 recipients on vaccine Y. The vaccine X recipients had a mean 6AEQ of x = 151. The vaccine Y recipients had a mean 6AEQ of y = 148. It is recognized that the true standard deviation of 6AEQ for vaccine X recipients is o, = 9.7 while it is recognized that the true standard deviation of 6AEQ for vaccine Y recipients is o, = 10.5. The true (unknown) mean SAEQ for vaccine X recipients is ly, while the true (unknown) mean 6AEQ for vaccine Y recipients is 4,. 6AEQ measurements are known to be a normally distributed. summary: Sample Size Sample Mean Standard Deviation 9.7 Гуре Vaccine 78 151 Vaccine Y 93 148 10.5 What is the length of your 96% confidence interval for uy Hy ? ) If we used this data to test Hg: Hy - Hy =0 against the alternative H: uy…
![A First Course in Probability (10th Edition)](https://www.bartleby.com/isbn_cover_images/9780134753119/9780134753119_smallCoverImage.gif)
![A First Course in Probability](https://www.bartleby.com/isbn_cover_images/9780321794772/9780321794772_smallCoverImage.gif)
![A First Course in Probability (10th Edition)](https://www.bartleby.com/isbn_cover_images/9780134753119/9780134753119_smallCoverImage.gif)
![A First Course in Probability](https://www.bartleby.com/isbn_cover_images/9780321794772/9780321794772_smallCoverImage.gif)