Testing: H0:μ≥30.2H0:μ≥30.2 H1:μ<30.2H1:μ<30.2 Your sample consists of 24 values, with a sample mean of 30. Suppose the population standard deviation is known to be 4.79. a) Calculate the value of the test statistic, rounded to 2 decimal places. z=z= b) At α=0.03α=0.03, the rejection region is z>1.88z>1.88 z>2.17z>2.17 z<-2.17z<-2.17 z<-2.17orz>2.17z<-2.17orz>2.17 z<-1.88orz>1.88z<-1.88orz>1.88 z<-1.88z<-1.88 c) The decision is to Fail to reject the null hypothesis Reject the null hypothesis Accept the null hypothesis

Q: Testing: H0:μ=9.305H0:μ=9.305 H1:μ>9.305H1:μ>9.305 Your sample consists of 25 subjects, with a…

A: Given :H0:μ=9.305H1:μ&gt;9.305x¯=10.4s=4.59n=25The formula for test statistic is :t=x¯-μsn

Q: What is the mean of the distribution of sample means? μ¯x=μx¯=  What is the standard deviation of…

A:

Q: What is the z-score for an exam mark of 80

A: Given that μ = 71 and σ = 6 And we have to find the z score for an exam mark of 80.

Q: population of values has a normal distribution with μ=23.8μ=23.8 and σ=72.7σ=72.7. You intend to…

A:

Q: Testing: H0:μ=25.64H0:μ=25.64 H1:μ≠25.64H1:μ≠25.64 Your sample consists of 219 subjects, with a…

A: Given : H0:μ=25.64H1:μ≠25.64n=219x¯=26.2s=4.32The formula for test statistic is :Z=x¯-μsn

Q: The mean and standard deviation of the sample mean is given by Mean= Hx = µ = 2560 Standard…

A:

Q: A population has a mean μ = 130 and a standard deviation o =26. Find the mean and standard deviation…

A: Given that  Population mean (μ) = 130 Population standard deviation (σ) = 26 Sample size (n) = 52…

Q: μ=42.895H0:μ=42.895 H1:μ≠42.895H1:μ≠42.895 Your sample consists of 22 subjects, with a mean of 42.4…

A: As the population standard deviation is not known, we will use t distribution.

Q: Weight Loss of Newborns An obstetrician read that a newborn baby loses on average 7 ounces in the…

A:

Q: Assume that adults have IQ scores that are normally distributed with μ=38 and a standard deviation…

A:

Q: H0:μ=31.085H0:μ=31.085 H1:μ≠31.085H1:μ≠31.085 Your sample consists of 23 subjects, with a mean of…

A: Given: n =23 μ = 31.085 s = 4.43 X=30.8 As the population standard deviation is not known, the…

Q: study of working actors looked at age and gender. One sample of 75 male actors had a mean age of 25…

A: Given that  Sample Mean 1 (\bar X_1)(Xˉ1​) = 2525 Sample Standard Deviation 1 (s_1)(s1​) = 22…

Q: A population of values has a normal distribution with μ=203.6μ=203.6 and σ=45σ=45. You intend to…

A: Obtain the value separating the bottom 44% values from the top 56% values. The value separating the…

Q: A population has mean  =μ19  and standard deviation  =σ5 . Find  μx  and  σx  for samples of…

A:

Q: The score on a standardized test for a certain year is modeled using the normal distribution shown…

A: From the given information, it is clear that,  V=Mean μ=76.5, Standard deviation σ=5.2 According to…

Q: Testing: H0:μ=22.43H0:μ=22.43 H1:μ≠22.43H1:μ≠22.43 Your sample consists of 403 subjects, with a…

A: Null and alternative hypothesis is- H0:μ=22.43Ha:μ≠22.43Level of significance=0.05 Test statistic…

Q: people who were playing roulette is 55.5 with a standard deviation of 3.2 years. Can it be concluded…

A: The random sample  of people who were playing slot machines, The random sample of people who were…

Q: Testing: H0:μ=12.205H0:μ=12.205 H1:μ>12.205H1:μ>12.205 Your sample consists of 42 subjects, with a…

A: Here the sample mean is 13.5, the sample standard deviation is 2.59 and the sample size is 42.

Q: Ages of Gamblers The mean age of a sample of 25 people who were playing the slot machines is 49.9…

A: The Welch's t - test should be used to compare the mean differences between two population groups…

Q: For a test: HO: μ = 63 H1: μ > 63 X bar = 54, standard deviation (s) = 14 and sample size(n) = 225…

A: Answer: From the given data, mean (X¯) = 54 Standard deviation(S) = 14 Sample size(n) = 225 μ = 63

Q: H0:μ=5.3H0:μ=5.3 H1:μ≠5.3H1:μ≠5.3 Your sample consists of 43 subjects, with a mean of 5.6 and a…

A:

Q: random variable is normally distributed. It has a mean of 241 and a standard deviation of 17. For a…

A: Given that.   X~N( μ , ?)   μ=241 , ?=17   Z-score =( x - μ )/?

Q: The score on a standardized test for a certain year is modeled using the normal distribution shown…

A: It is given that the mean is 56.7 points and the standard deviation is 4.8 points.

Q: A population of values has a normal distribution with u = 239.7 and o = 42.6. You intend to draw a…

A:

Q: A random variable is normally distributed. It has a mean of 241 and a standard deviation of 17.…

A: given data normal distributionμ = 241σ = 17n= 10

Q: A population has a mean of μ = 87 and a standard deviation  = 24 find the mean and standard…

A:

Q: Ho: μ = 8.295 H₁:μ8.295 Your sample consists of 34 subjects, with a mean of 7.7 and standard…

A: From the provided information, Sample size (n) = 34 Sample mean (x̅) = 7.7 Sample standard deviation…

Q: A population has parameters u = 94.8 and o = 10.7. You intend to draw a random sample of size n =…

A:

Q: alculate the test statistic, rounded to 2 decimal places.

A: Given : n=21 , X-bar=44.1  , s=2.09 , μ0=43.855  Our aim is to find the value of the test statistic.…

Q: A mean and standard deviation of a normal variate are 8 and 4 respectively. Find P(5 < x < 10)

A: Given that ; Population mean (u) = 8  Standard deviation = 4 By using standard normal distribution…

Q: A population has a mean μ=79 and a standard deviation σ=18. Find the mean and standard deviation of…

A:

Q: A population of values has a normal distribution with μ=86.1μ=86.1 and σ=46.3σ=46.3. You intend to…

A: 88th implies area of 0.88 to the left of the normal curve. Refer Standard normal table/Z-table,…

Q: Testing: H0:μ=59.325H0:μ=59.325 H1:μ≠59.325H1:μ≠59.325 Your sample consists of 40 subjects, with a…

A:

Q: ← A population has a mean μ 156 and a standard deviation o=30. Find the mean and standard deviation…

A: simple formula of sample mean has used and solve.

Q: sample of 40 items resul- tandard deviation is o= 5 . dard error of the mean (O

A: Given Data Population Mean,μ = 25.0 Population Standard Deviation,σ = 5.0

Q: Wechsler Adult Intelligence Scale (WAIS) scores follow a Normal distribution with  μ=10μ=10 and…

A: Solution: Let X be the Wechsler Adult Intelligence Scale score. From the given information, X…

Q: Find the value separating the bottom 45% values from the top 55% values.   Find the sample mean…

A: The values separating from bottom 45% value from the top 55% values will be:

Q: The equation for a general normal curve with mean ? and standard deviation ? is images Calculate…

A:

Q: Testing: H0:μ=22 H1:μ<22 Your sample consists of 23 subjects, with a mean of 21.5 and standard…

A: Denote μ as the population mean.

Q: The mean age of a sample of 25 people who were playing the slot machines is 49.9 years, and the…

A: The random sample  of people who were playing slot machines, The random sample of people who were…

Q: Calculate the test statistic, rounded to 2 decimal places.

A:

Q: H0:μ=25.735H0:μ=25.735 H1:μ≠25.735H1:μ≠25.735 Your sample consists of 46 subjects, with a mean of…

A:

Q: A population of values has a normal distribution with μ=191.3μ=191.3 and σ=79.3σ=79.3. You intend to…

A: Given Population mean μ=191.3, standard deviations σ=79.3, n=239 Let X be the population value…

Q: Testing: H0:μ=50.9H0:μ=50.9 H1:μ<50.9H1:μ<50.9 Your sample consists of 33 subjects, with a mean of…

A:

Q: 2. Hypothesis: College students sleep less than the recommended 8 hours. Data: Sample mean (X) =…

A: Given data: Sample mean, X¯=7.25 Sample standard deviation, SX=2.1 Sample size, N = 25 Let the level…