State the null and alternative hypotheses
Q: The mean serum cholesterol in American males over 60 years of age is 220 with a standard deviation…
A:
Q: Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.21 and a…
A: X~N( μ , ?) μ=8.21 , ?=1.48 Z-score =( x - μ )/?
Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…
A: According to the given information in this question There are more than three subparts according to…
Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…
A: a)Hₒ: μ = 114Hₐ: μ > 114 b)t c)t = 2.28449883 d)p = 0.01773328 e)Yes Explanation:Step 1: List the…
Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…
A:
Q: A village head wants to know the number of chickens in his area. So the Lurah conducted research on…
A: Given data : sample size, n =36 sample mean, x̄ = 4.7 sample standard deviation,s=…
Q: top stu ents, an administrator at a college claims that this year's entering class must have a…
A: given data, claim:μ>113n=18x¯=116s=9α=0.05
Q: ccording to her Dr., Mrs. Brown's cholesterol level is higher than only 5% than females aged 50 and…
A: Given data, Mean=230 sd=25 P(X<x)=0.05 x=?
Q: A town's average rainfall in the month of March is 7 inches with a standard deviation of 1.8 inches;…
A: Given: Rainfall in Month of March μ=7σ=1.8 Rainfall in Month of August μ=3.5σ=0.4 and x=4
Q: in 2015 when she was a high school senior, linda scored 680 on the mathmatics part of the SAT the…
A: Obtain the Z-score for the SAT math score of 680 scored by Linda.Consider the scores on SAT math…
Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…
A: We have given that Sample size (n) = 16Sample mean (x̅) = 116Standard deviations (s) = 9Significance…
Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…
A: Given: sample size n = 14sample mean x̄ = 114sample standard deviation s = 13population (claimed)…
Q: Suppose that grade point averages of undergraduate students at one university have a bell-shaped…
A: Answer: 2.5%.Explanation:Detailed explanation: 1. Calculating the Z-score: The Z-score formula…
Q: The mean age when smokers first start is 13 years old with a population standard deviation of 2…
A: The hypotheses for the test is given below.Null hypothesis:H0: µ = 13Alternative hypothesis:H1: µ ≠…
Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…
A: GivenMean(x)=114standard deviation(s)=13sample size(n)=14significance level(α)=0.05
Q: to test if these results says that the average of daily calcium take from low income adults is below…
A: Given : μ0 = 800 Sample Mean (Xˉ)(\bar X) = 755.3 Sample Standard Deviation (s)(s) = 239.3 Here…
Q: Based on data from the u.s. census, the mean age of college students in 2011 was 25 years, with a…
A: Given that: X is normal Distributed with mean µ = 25.0 and standard deviation σ = 9.5 By using…
Q: A market research firm reported that the mean annual earnings of all family practitioners in the…
A: From the provided information, Sample size (n) = 38 Sample mean (x̄) = 198513 Sample standard…
Q: hanks to an initiative to recruit top students, an administrator at a college claims that this…
A: Given that:
Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…
A:
Q: Thanks to än initiative to recruit top students, an administrator at a college claims that this…
A: a) The hypotheses for the test are given below. Null hypothesis: H0: µ =111
Q: Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.358.35…
A: The provided information are: Population mean (µ) = 8.35 Population standard deviation (σ) = 1.46
Q: Suppose that grade point averages of undergraduate students at one university have a bell-shaped…
A: Empirical rule: The probability that the observation under the normal curve lies within 1 standard…
Q: Can you conclude the mean price in 2013 is greater than the mean price in 2012?
A: Sample size is n = 70 Sample mean = 295 And population SD = 148 Test is that whether the mean price…
Q: Suppose that grade point averages of undergraduate students at one university have a bell-shaped…
A: From the provided information, Mean (µ) = 2.61 Standard deviation (σ) = 0.44
Q: Using the empirical rule, what percentage of American women have shoe sizes that are no more than…
A: It is given that Mean, μ = 8.33Standard deviation, σ = 1.5
Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…
A: As per our guidelines I can solve only first three subparts. Kindly post the remaining subparts…
Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…
A: The null hypothesis is: H0: μ = 114. The alternative hypothesis is: H1: μ > 114
Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…
A: Given that Xbar = 114 , n= 22, s= 15, mu = 111 Alpha= 0.05 Note: According to Bartleby…
Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…
A: given data,claim: μ>110n=11x¯=112s=15α=0.05one- tailed test
Q: Suppose that grade point averages of undergraduate students at one university have a bell-shaped…
A: Empirical rule: The probability that the observation under the normal curve lies within 1 standard…
Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…
A: From given data we have : Number of sample (n) = 21 Sample mean (X―) = 112 Sample Standard…
Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…
A: The given sample size is 11, sample mean is 118 and sample standard deviation is 9.
Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…
A: From the provided information, Sample size (n) = 11 Sample mean (x̄) = 118 Sample standard deviation…
Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…
A: Given,sample size(n)=18sample mean(x¯)=120standard deviation(s)=9α=0.10
Q: Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.168.16…
A: Given : population mean, u = 81.6 population standard deviation,σ = 1.52
Q: Thanks to an initiative to recruit top students, an administrator at a college claims that this…
A: Answer Mean =116Standard deviation =10sample size =19level of significance =0.05
Mrs. Sal is considering of running a saloon business. The present owner claimed that over the past 6
years the average daily revenue has been RM 675 with a standard deviation of RM 75. A sample of 30
selected days reveals daily average revenue of RM 625. Use p- value approach.
State the null and alternative hypotheses.
Step by step
Solved in 2 steps
- Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.12 and a standard deviation of 1.53 Using the empirical rule, what percentage of American women have shoe sizes that are less than 9.65? Please do not round your answer.Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.168.16 and a standard deviation of 1.511.51. Using the empirical rule, what percentage of American women have shoe sizes that are less than 9.679.67? Please do not round your answer.Kathy and her brother Clay recently ran in a local marathon. The distribution of finishing timefor women was approximately normal with mean 259 minutes and standard deviation 32minutes. The distribution of finishing time for men was approximately normal with mean 242minutes and standard deviation 29 minutes. (a) The finishing time for Clay was 289 minutes. Calculate and interpret the standardized scorefor Clay’s marathon time. Show your work. (b) The finishing time for Kathy was 272 minutes. What proportion of women who ran themarathon had a finishing time less than Kathy’s? Show your work. (c) The standard deviation of finishing time is greater for women than for men. What does thisindicate about the finishing times of the women who ran the marathon compared to thefinishing times of the men who ran the marathon?
- Thanks to an initiative to recruit top students, an administrator at a college claims that this year's entering class must have a greater mean IQ score than that of entering classes from previous years. The administrator tests a random sample of 17 of this year's entering students and finds that their mean IQ score is 112, with a standard deviation of 15. The college records indicate that the mean IQ score for entering students from previous years is 111. Is there enough evidence to conclude, at the 0.10 level of significance, that the population mean IQ score, μ, of this year's class is greater than that of previous years? To answer, assume that the IQ scores of this year's entering class are approximately normally distributed. Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis H0 and the alternative hypothesis H1. H0:…A doctor believes women have been getting taller. She knows that 10 years ago the average height of women in her city was 63 inches. The standard deviation is unknown. She randomly samples 8 women from the town and finds their average height to be 64.5 inches, the standard deviation was 6.5. state the hypotheses(H0 and H1) What is your conclusion based on α=0.052tailThe mean waiting time for non-emergency surgeries in your hospital is 87.5 days with astandard deviation of 14 days. Over the last year the hospital’s CEO has beenimplementing various programs to try to reduce the waiting time. You are asked to testwhether the wait times have changed from the previous average. Not knowing if thewait times have increased or decreased, you hypothesize that the wait times are not 87.5days. You randomly select 100 cases and calculate the average wait time, which is 84days. Use ?= 0.05
- Five years ago, the average term length for a new car loan was 69.3 months. Loan analysts noticed that the average term lengths have been getting longer and think that now the average term length is more than 69.3 months. A sample of 80 new car loans from from the first quarter of 2021 randomly selected. The sample mean term length is 72 months. This data is widely studied, so we know that that population standard deviation for loan term length is 12 months. Find the test statistic and p-value for this hypothesis test. Round answers to 3 decimals.Thanks to an initiative to recruit top students, an administrator at a college claims that this year's entering class must have a greater mean IQ score than that of entering classes from previous years. The administrator tests a random sample of 11 of this year's entering students and finds that their mean IO score is 118, with a standard deviation of 13. The college records indicate that the mean IO score for entering students from previous years is 110. Is there enough evidence to conclude, at the 0.10 level of significance, that the population mean IQ score, M, of this year's class is greater than that of previous years? To answer, assume that the IQ scores of this year's entering class are approximately normallydistributed. Perform a one-tailed test. Then complete the parts below.Carry your intermediate computations to three or more decimal places.Thanks to an initiative to recruit top students, an administrator at a college claims that this year's entering class must have a greater mean IQ score than that of entering classes from previous years. The administrator tests a random sample of 22 of this year's entering students and finds that their mean IQ score is 112, with a standard deviation of 9. The college records indicate that the mean IQ score for entering students from previous years is 111. Is there enough evidence to conclude, at the 0.10 level of significance, that the population mean IQ score, μ, of this year's class is greater than that of previous years? To answer, assume that the IQ scores of this year's entering class are approximately normally distributed. Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis Ho and the alternative hypothesis H₁. H₂₁:0 H₁ :0 (b)…
- Thanks to an initiative to recruit top students, an administrator at a college claims that this year's entering class must have a greater mean IQ score than that of entering classes from previous years. The administrator tests a random sample of 21 of this year's entering students and finds that their mean IQ score is 112, with a standard deviation of 9. The college records indicate that the mean IQ score for entering students from previous years is 111. Is there enough evidence to conclude, at the 0.10 level of significance, that the population mean IQ score, u, of this year's class is greater than that of previous years? To answer, assume that the IQ scores of this year's entering class are approximately normally distributed. Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis Ho and the alternative hypothesis H₁. 0 Ho H₁ :0 1 (b)…Thanks to an initiative to recruit top students, an administrator at a college claims that this year's entering class must have a greater mean IQ score than that of entering classes from previous years. The administrator tests a random sample of 21 of this year's entering students and finds that their mean IQ score is 118, with a standard deviation of 13. The college records indicate that the mean IQ score for entering students from previous years is 113. Is there enough evidence to conclude, at the 0.10 level of significance, that the population mean IQ score, μ, of this year's class is greater than that of previous years? To answer, assume that the IQ scores of this year's entering class are approximately normally distributed. Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis Ho and the alternative hypothesis H₁. H₂ : O H₁ :0 (b)…After sitting in the waiting room for 12 minutes, a patient begins to complain. Is this patient’s wait time unusual?
