Suppose that the speed at which cars go on the freeway is normally distributed with mean 75 mph and standard deviation 8 miles per hour. Let X be the speed for a randomly selected car. Round all answers to 4 decimal places where possible. b. If one car is randomly chosen, find the probability that it is traveling more than 72 mph. d. 84% of all cars travel at least how fast on the freeway? mph.

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A: Given that  Mean = 0 , Standard deviation = 1

Q: IQR If data are approximately normal, then 1.3 O A. True O B. False

A: We have given that  If data are approximately normal then IQR /s2 = 1.3

Q: he measure of dispersion O a. Interquartile range b. O b. Coefficient of variation O c. Range O d.…

A: Mean = x¯

Q: B. The following table shows the distribution of the number of hours worked each week (on average)…

A:

Q: 9% of all cars fail the emissions inspection, find the probability that in a sample of 125 cars, 16…

A: Given n=125 P=0.09

Q: Fill in the missing values in the table. Round your responses for the expected frequencies to two or…

A: To fill the missing  values.

Q: The number of ants per acre in the forest is normally distributed with mean 42,000 and standard…

A:

Q: Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard…

A: The graph corresponding to P(80)  is Option C which separate bottom 80% from top 20%. Hence option C…

Q: Today, the waves are crashing onto the beach every 4.6 seconds. The times from when a person arrives…

A: The mean of this distribution is  a midpoint between the ends.  Mean = (4.6 + 0)/2 = 2.3 seconds

Q: A bus comes by every 7 minutes. The times from when a person arives at the busstop until the bus…

A: The mean would be midpoint between the ends. μ = (0 + 7 )/2 = 3.5 minutes

Q: Which among the value approximately equal to P(Z>-1.20) A.) 0.1151 B.) 0.3849 C.) 0.7698 D.) 0.8849

A: Let Z be the random variable from normal distribution the we will find the probability    P(Z>…

Q: hts per a 12,370. Let X = number o places where possible.

A: Here it is given that X denotes the no of ants in a randomly selected acre of a forest. Mean (μ) =…

Q: Assume that a randomly selected subject is given a bone density test. Those test scores are normally…

A: From the provided information, Mean (µ) = 0 Standard deviation (σ) = 1 Let X be a random variable…

Q: he mean number of sick days an employee takes per year is believed to be about 10. Members of a…

A: Given: The number of six days per year. μ0=10n=8α=0.05

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A:

Q: The weights of steers in a herd are distributed normally. The standard deviation is 200lbs. and the…

A: Let "X" be the weight of steers in a herd.

Q: 8 The population of a country follows a normal distribution with mean height 175 cm and standard…

A: Given Population mean μ=175, standard deviations σ=6  Let X be the height  X~N(μ=175, σ=6) Note:…

Q: 8 The population of a country follows a normal distribution with mean height 175 cm and standard…

A: Mean(µ) = 175Standard deviations (σ) = 6X ~ N (µ, σ )= N(175, 5)

Q: A 138.

A: Probability is the method used to obtain the chance of an event happening. It never takes negative…

Q: An archer can either hit or miss his target. The probability of hitting a target is 60.0% . Suppose,…

A: Given data : Probability (p) = 0.60 Number of Attempts (n) = 19 Binomial to normal Approximation is…

Q: State whether the z score locates the raw score X within a sample, or within a population. For every…

A: Note: According to bartleby experts question answers guidelines an expert can solve only first three…

Q: Suppose you roll one six-sided die. Let X = the number shown on the die. Calculate μ, the mean value…

A: There are 1,2,3,4,5,6 on a die  Probability of getting a number is = 1/6

Q: Suppose 26% of all small businesses are owned by a particular group of people. In a random sample of…

A:

Q: The average THC content of marijuana sold on the street is 10.8%. Suppose the THC content is…

A: Given, mean= 10.8  Standard deviation= 1 So, variance= 12=1 So, X~N(mean,variance)= N(10.8,1)…

Q: A student takes a multiple-choice test that has 6 questions. Each question has four choices. student…

A: It is given that,  A student takes a multiple-choice test that has 6 questions i.e. n=6 Each…

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A: Obtain the 7th percentile of the distribution.   The 7thpercentile of the distribution is obtained…

Q: The average high temperature in Anchorage, AK in June is 63°F with a standard deviation of 1.6°F.…

A:

Q: Examine the image below and then answer all parts of the question under it. Enter your answers as…

A: a) There are 4 yellow objects in 10 objects.So, P(yellow)=410=0.4b) There are 3 hearts in the 10…

Q: Percentage of 18-to 24-year olds living in parents' homes Refer to the figure at the right. At a =…

A: For the given data perform z test for two proportion test

Q: Refer to the figure at the right. At a= 0.10, can you reject the claim that the proportion of 18 to…

A:

Q: The distances golf balls travel under laboratory testing conditions are normally distributed. The…

A:

Q: ease answer all these question

A: (a) Given: μ=18, σ=4.5 The corresponding z-value needed to be computed is: The probability that a…

Q: Can you reject the claim that the proportion of 18 to 24-year-olds living in their parents' homes…

A: Given that  Sample sizes n1=248 , n2=244 Sample proportion p1^=0.515 , p2^=0.412

Q: Assume that adults have IQ scores that are nomally distributed with a mean of u= 100 and a standard…

A: It is given that the mean is 100 and standard deviation is 15.

Q: 1. Devon is expected to receive 70% of the votes at the student council election. If there are 650…

A: Note: As per our guidelines we are supposed to answer only 1 question per post so i am solving first…

Q: Assume that a randomly selected subject is given a bone density test Bone density test scores are…

A: It is an important part of statistics . It is widely used .

Q: Smith works as a welder inspector in a shipyard. He knows from keeping track of good and poor welds…

A: Let p denote the propprtion of poor welds. Given that p = 5% = 0.05 Sample size n = 300

Q: c. Identify the mean and standard deviation of x. Choose the correct answer below. O A. µ and В. н…

A: If X be a random variable which follows normal distribution. Then mean and standard deviation of…

Q: an ahnual salary for tenured college professors at a certain college is $50,00. o-$1,800. Answer…

A:

Q: a population of normally distributed scores,   = 230 and   = 10. Approximately what percentage of…

A: given data  normal distribution μ = 230σ = 10n = 25P(228<x¯<232) = ?

Q: Q.5. Find the median if the mean and mode are given as 35 and 30 respectively?

A: Step 1: When the mean and mode are given, then the median can be computed by the empirical…