Question

Use the information below for the following two questions. The random variable X denotes the monthly amount spent on food by a typical family. The food expenditures follow a normal distribution with a mean of $700 and a variance of $3600, i.e. X~N(700,3600). 1. What is the probability that the expenditures are greater than $600, i.e. P(X ? 600)? 0.667 0.475 0.525 0.952 2. What is the probability that the expenditures are between $650 and $750, i.e. P(650 ? X ? 750)? a. 0.407 b. 0.833 c. -0.5934 d. 0.5934 Use the following information for the next three questions: The cost to process insurance claims is normally distributed with a population variance of $100. The McFarland Insurance Company takes a sample of 49 claims and reports the sample mean cost to process a claim is $67. 3. Construct a 95% confidence interval for the true mean cost to process claims for the McFarland Insurance Company. a. [65.169, 68.831] b. [64.200, 69.800] c. [64.650, 69.350] d. [64.604, 69.396]

          Use the information below for the following two questions.
The random variable X denotes the monthly amount spent on food by a typical family. The food expenditures follow a normal distribution with a mean of $700 and a variance of $3600, i.e. X~N(700,3600).

1. What is the probability that the expenditures are greater than $600, i.e. P(X ? 600)?
0.667
0.475
0.525
0.952

2. What is the probability that the expenditures are between $650 and $750, i.e. P(650 ? X ? 750)?
a. 0.407
b. 0.833
c. -0.5934
d. 0.5934

Use the following information for the next three questions:
The cost to process insurance claims is normally distributed with a population variance of $100. The McFarland Insurance Company takes a sample of 49 claims and reports the sample mean cost to process a claim is $67.

3. Construct a 95% confidence interval for the true mean cost to process claims for the McFarland Insurance Company.
a. [65.169, 68.831]
b. [64.200, 69.800]
c. [64.650, 69.350]
d. [64.604, 69.396]

Use the information below for the following two questions.
The random variable X denotes the monthly amount spent on food by a typical family. The food expenditures follow a normal distribution with a mean of 700 and a variance of3600, i.e. X N(700,3600).

1. What is the probability that the expenditures are greater than 600, i.e. P(X ? 600)?
0.667
0.475
0.525
0.952

2. What is the probability that the expenditures are between650 and 750, i.e. P(650 ? X ? 750)?
a. 0.407
b. 0.833
c. -0.5934
d. 0.5934

Use the following information for the next three questions:
The cost to process insurance claims is normally distributed with a population variance of100. The McFarland Insurance Company takes a sample of 49 claims and reports the sample mean cost to process a claim is 67.

3. Construct a 95% confidence interval for the true mean cost to process claims for the McFarland Insurance Company.
a. [65.169, 68.831]
b. [64.200, 69.800]
c. [64.650, 69.350]
d. [64.604, 69.396]

Added by Gloria R.

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