5. The manager of a rent-a-car business want to know whether the true average numbers of cars rented a day is 25 with a standard deviation of 6.9 rentals. A random sample of 36 days was taken and found to have an average of 22.8 rentals. Test at 0.05 level of significance. Type of test : Z computed = Z-tabular =

Q: What percentage of fire station response times are under 3 minutes

A: Let X denote the response times for fire departments. Given that X follows N(mean = 4.5, SD = 1.2),…

Q: Consider a sample with a mean of 500 and a standard deviation of 100. What are the z-scores for the…

A: The mean is 500 and the standard deviation is 100.

Q: 2. Which is a better score: a score 82 on a test with a mean of 70 and a standard deviation of 8,…

A:

Q: A succesful basketball player has a height of 6 feet 4 inches or 193 cm based on statisc from data…

A:

Q: Assume that the number of pieces per bag has a mean of 72 with a standard deviation of 1.use the…

A: We have to find given probability by using emperical rule...

Q: For what lengths will a bolt be​ destroyed?

A: here given, mean = 7cm standard deviation = 0.10 cm

Q: Hypothesis Tests - 2 samples x C Solved: One of the questions b Answered: The mean numbero x P…

A: Answer:- The independent t-test implies that the means of the two independent populations are…

Q: The average score on the standard I.Q test is 100 with standard deviation 15. The     Mensa group…

A:

Q: 1. Exercise: Medical researchers conducted a study to determine whether treadmill exercise could…

A: From the provided information,

Q: Consider a sample with a mean of 500 and a standard deviation of 100. What are the z-scores for the…

A:

Q: The mean number of English courses taken in a two-year time period by male and female college…

A: Answer:-

Q: If the heights of intramural college basketball players are normally distributed with mean u =…

A: Given,μ=70σ=6.5P(63.5<X<76.5)=?

Q: The mean number of English courses taken in a two-year time period by male and female college…

A: Here we will conduct a 2 independent sample t-test to test the equality of the average number of…

Q: Assume that the heights of women are normally distributed with a mean of 65.4 inches and a standard…

A: We have given that  Mean=μ=65.4 Standard deviation=σ=2.7 X~Normal(μ=65.4,σ=2.7)

Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…

A: Determine the level of significance.   Significance level:    In order to decide how small the…

Q: Sketch the distribution of heights. What percentage of students are over 73.38 inches tall? What…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: are normally distributed with a mean of 100 and a standard deviation of 15. What IQ is in the 90th…

A: Kwe have to find out given probabiity..

Q: If research samples 28 college students and wants to compare the sample mean of 8 to the population…

A: From the provided information, Sample size (n) = 28 Sample mean (x̄) = 8 Population mean (µ) = 12…

Q: Assume that the number of days from conception to birth is normally distributed with a mean of 271…

A: Given that  Mean = 271, SD = 4 X = 238

Q: you created a survey that measue Depression In you want to test people. the Claim that the mean.…

A: Solution-: Given: x¯=6.7,μ0=6.5,n=145,s=1.5 We test the claim that the mean measurement of…

Q: Home prices in a city have mean = $194,000 and standard deviation = $20,000. For n = 25 randomly…

A: population mean ()=194000standard deviation()=20000sample size(n)=25Mean()=198000

Q: f the class average is 84

A: Here it is given that - Mean (μ) = 84 Standard Deviation (σ) = 5 Let, X be a random variable which…

Q: Suppose that water usages in American showers are normally distributed, with an average shower using…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 16.4 and…

Q: le who did workshop = 156 (standard deviation = 8.2);

A: Let X1 be the random variable such that the test score of people who did the workshop. x¯1 : Sample…

Q: A test was administered for a group of 400 students and scores were obtained. The scores are…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…