A brokerage survey reports that 28% of all individual investors have used a discount broker (one that does not charge the full commission). If a random sample of 125 individual investors is taken, approximate the probability that fewer than 33 have used a discount broker. Use the normal approximation to the binomial with a correction for continuity. Round your answer to at least three decimal places. Do not round any intermediate steps.

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

A: Givenp^=0.05sample size(n)=300

Q: 1. Suppose that X is a binomial random variable with n = 200 and p = 0.4. Find the probability P(X<…

A:

Q: A professional basketball player makes 85% of the free throws he tries. Assuming this percentage…

A: Ans: Given P = 85%  = 0.85          n = 8   and  x = 8      Find  P( X = 8) =?

Q: find the probability of left of z = 2.3456

A: z-score: The area under the Normal distribution curve represents the probability and the total area…

Q: the probability that an individual with a Bachelor Degree in Underwater Basket-weaving will be hired…

A:

Q: The Gallup Poll reported that  52%  of Americans used a seat belt the last time they got into a…

A: Let X be number of people used a seat belt the last time they got into a car from binomial…

Q: The probability that it will rain tomorrow is 0.4.  If it rains tomorrow, the probability that it…

A: The tree diagram for the given scenario is given below:

Q: 8% of Dr. Williams patients end up with 20-30% vision or better. Find the probability that exactly 4…

A: Let the give data be probability of patients getting well = 0.98 The number of patients. n = 4

Q: At a pizza restaurant, the probability that a customer will order pizza is 0.9 and the probability…

A: Conditional probability : The probability of event B given that the event A has already occurred is…

Q: The probability that it will rain in a city is 0.1. Find the probability that it will rain on two…

A: Given that the probability that it will rain in a city is 0.1. Two consecutive days are independent…

Q: Consider the discrete data in the table below. a) Construct a frequency distribution a) Construct a…

A: Frequency Distribution : A frequency distribution is representation of data in a graphical (or)…

Q: Zion Williamson makes 65% of his freethrow attempts. Calculate the probability that he makes exactly…

A: The objective of this question is to calculate the probability that Zion Williamson makes exactly 6…

Q: furnace bills are normally distributed.  With a mean of 273 and an SD of 30.  If 144 bills are…

A: Let M denote the mean of sample of n = 144 bills. Then M follows N(mean = 273, SD = 30/√(144) = 2.5)…

Q: High school seniors who are accepted to TCNJ have a 60% yield rate, meaning that 60% of accepted…

A: Given information, the percentage of accepted students decide to attend TCNJ is 60% and there are 3…

Q: A certain disease has an incident rate of 0.5%. If the false negative rate is 4% and the false…

A: Given that the false-negative rate is 4%. That means the probability of having the disease when the…

Q: The probability that it will rain in a city is 0.1. Find the probability that it will rain on a…

A: Given data: The probability that it will rain in a city is P(R)=0.1. The expression for the…

Q: Calculate the coefficient of alienation.  Predict the Y

A: Given information: The data represents the values of the variables x = hours and y = quiz.

Q: A corporate Web site contains errors on 100 of 750 pages. If 50 pages are sampled randomly without…

A:

Q: Find the probability that: (a) a randomly selected radio lamp will last the warranty period; b) a…

A: Let us define some events A : radio is of first type. B : radio is of second type. E : radio lamp is…

Q: Suppose a weather report indicates that the probability of rain this week is 0.20. According to the…

A: Tree Diagram for this problem :

Q: The probability that it will rain tomorrow is 0.38. If it rains tomorrow, the probability that it…

A: Event A : rain tomorrow Event B : rain day after tomorrow        P(A)= 0.38P(B|A)  = 0.8P(B|A') =…

Q: An ectopic pregnancy is twice as likely to develop when the pregnant woman is smoker compared to…

A: Consider EP represents the event that the women have an ectopic pregnancy.Consider S represents the…

Q: The probability that a salmon swims successfully through a dam is 0.85. Find the probability that…

A: From the provided information, Probability that a salmon swims successfully through a dam is 0.85.…

Q: Write the binomial probability and the normal probability for the shaded region of the graph. Find…

A: Given The data is as follows: Sample size, n=16 Probability of success, p=0.5

Q: You buy a lottery ticket that costs $20. There are only 100 tickets available to be sold in this…

A: The amount for a lottery ticket is $20.

Q: An earth-conscious clothing store offers a 15% discount if you bring in a bag full of old clothing…

A: From the given information, n=20 and p=0.69.

Q: Assume that the probability of a defective computer component is 0.22. Find the probability that the…

A: The probability density function for the geometric distribution with x trails for the first success…

Q: A sample of size 86 will be drawn from a population with mean 90 and standard deviation 24. Use the…

A:

Q: Suppose a weather report indicates that the probability of rain this week is 0.20. According to the…

A: P(No rain for next two weeks) No Rain = N

Q: Hospitals like to have electricity provided when there is a blackout. Assume that the backup…

A: Given: Number of trials (n) = 2 Probability of success (p) = 0.38

Q: Find the average lifetime of the machine part. Calculate the probability that the lifetime of the…

A: fx= 10+x-2; 0&lt;x&lt;40 fx=k 10+x-2; 0&lt;x&lt;40 First, we have to find the value of k Therefore,…

Q: Find the probability that z is greater than -1.72

A: Given: Z is standard normal r.v. i.e. Z~N(0,1)

Q: Write the normal probability for the shaded region of the graph and find its value. Select the…

A: Here , Continuity correction concept is applicable.   The result are about the same

Q: Customers using a self-service soda dispenser take an average of 16 ounces of soda with an SD of 4…

A: Given data  Normal distribution μ = 16σ = 4 P(x&gt;14) = ?

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.